1% Better Every Day: Marginal Gains and the Math of Tiny Habits
The real math behind 1% better every day, the British Cycling story with its other side, and how to pick a daily 1% you'll actually keep.
Key takeaways
- Getting 1% better every day for a year gives 1.01^365, about 37.78, while getting 1% worse every day gives 0.99^365, about 0.026, or 2.6% of where you started.
- The gains are nearly invisible at first: after 30 days the 1% curve stands at only 1.35, and most of the growth comes in the second half of the year.
- Bad days cost more than they seem: 6 good days and 1 bad day a week end a year at about 13.4x, while 5 good days and 2 bad days end at about 4.7x.
- Dave Brailsford's marginal gains meant improving many parts of competing on a bike by about 1% at once, while James Clear's 1% means one habit getting a little better every day.
- Marginal gains work on top of the basics, not instead of them: Brailsford said his Tour team first focused on the periphery and not on the core, and Team Sky also had far more money than its rivals.
Getting 1% better every day means making tiny improvements that compound like interest: 1.01 to the power of 365 is about 37.78, so in theory you'd be 37 times better after a year. Get 1% worse every day and you end up with 2.6% of where you started (0.99^365 is about 0.026).
Heard "1% better every day" and wondered if it's real math or just a slogan? Below: the math, day by day, what a realistic year looks like, the British Cycling story behind the "aggregation of marginal gains" (and what it leaves out), and how to pick your first 1%.
What does "1% better every day" mean?
1% better every day means making tiny improvements that compound like interest: each day builds on the last, so the gain is invisible day to day but large after months. It's a model of consistency, not a promise of exact growth.
Definition
- 1% better every day
- Improving a skill or habit by a tiny amount each day, so the gains multiply over time instead of simply adding up.
The idea most people know came in three steps. Dave Brailsford hunted for 1% improvements in everything that goes into riding a bike at British Cycling, the aggregation of marginal gains. James Clear turned it into a daily rule, in a 2014 article on marginal gains and in chapter 1 of Atomic Habits (2018), "The Surprising Power of Atomic Habits." Then it spread through coaching and social media, usually without the math.
In practice, "1%" (whether you write "1% better everyday" or "one percent better every day") isn't measured exactly. It's a direction: slightly better than yesterday.
Brailsford's 1% vs James Clear's 1%
These are two different models, often blurred. Brailsford's 1% runs across parts: improve many things (the bike, food, sleep, hygiene) by about 1% each and add them up into an edge on race day. Clear's 1% runs across time: improve one thing by 1% a day, and each day multiplies the last.
Only the second gives you the 37x math.
Atomic Habits and "tiny changes, remarkable results"
Atomic Habits opens with this idea: chapter 1 tells the British Cycling story and shows what 1% better or worse a day adds up to. The book's tagline is "Tiny Changes, Remarkable Results." The rest is about making those changes stick; our Atomic Habits cheat sheet sums up its four laws.
The math: 1.01^365 = 37.78 (and 0.99^365 = 0.026)
Getting 1% better every day for a year gives 1.01^365, which is about 37.78: you'd end the year about 37 times as good as you started. The trick is that each day's 1% is taken from the new level, not the starting one, like interest on interest.
One example shows the difference. Start at 1 and add 1% of that starting level every day: you gain 3.65 over a year and end at 4.65.
Now make each day 1% better than the day before, and you end at 37.78. Same daily step, a very different curve.
Two common misreadings. 37.78 is the end value, so it means "37 times as good" (about 3,678% better), not "37% better." And 0.026 means 2.6% is left, not 3%; the 0.03 you often see is rounded up.
| Day | 1% better (1.01^n) | 1% worse (0.99^n) |
|---|---|---|
| Day 7 | 1.07 | 0.93 |
| Day 30 | 1.35 | 0.74 |
| Day 66 | 1.93 | 0.52 |
| Day 100 | 2.70 | 0.37 |
| Day 180 | 6.00 | 0.16 |
| Day 365 | 37.78 | 0.026 |
After 30 days you're 1.35 times better, hardly noticeable. Day 66 is in the table on purpose: in a 2010 study that followed 96 volunteers, Phillippa Lally and colleagues found a median of 66 days for a daily behavior to feel automatic among the participants whose data fit their model, with estimates from 18 to 254 days (more in how many days it takes to form a habit). Even then you're under 2 times better on paper.
Most of the growth comes in the second half of the year, so the first weeks can feel like nothing is happening, even when the math is working.
The plateau of latent potential
In Atomic Habits, Clear calls this gap the Plateau of Latent Potential. Early on, results lag behind effort, so the work feels wasted.
His image is an ice cube in a cold room: warm it from 25 to 31 degrees Fahrenheit and nothing seems to happen; at 32 it starts to melt. The work wasn't lost. It was stored.
Why the 0.99 side matters more
The curve runs the other way too, and small losses rarely feel like losses: an hour of scrolling in bed, one skipped workout, one more snooze. Each day costs almost nothing, so you never decide to stop. That's why cutting one daily loss can matter as much as adding a new habit.
Calculate your own 1%: the formula and a quick table
No calculator needed. The whole model fits on one line:
Result = (1 + r)^good days × (1 - r)^bad days
Here r is your daily change as a decimal (1% is 0.01). On a phone calculator, turn it sideways, type 1.01, press x^y, type 365 and press equals. For mixed weeks, raise 1.01 to the number of good days, 0.99 to the number of bad days, and multiply. The table below gives common rates.
| Daily improvement | After 30 days | After 90 days | After 365 days |
|---|---|---|---|
| 0.1% | 1.03x | 1.09x | 1.44x |
| 0.5% | 1.16x | 1.57x | 6.17x |
| 1% | 1.35x | 2.45x | 37.78x |
| 2% | 1.81x | 5.94x | 1,377x |
Is 1% better every day realistic?
The math is right, but nobody gets exactly 1% better every day. What the model does show is which patterns pay off and which quietly cancel out. Here's what more realistic years look like, worked out with the same formula (a year counted as 52 weeks plus one day).
| Scenario | After 1 year | What it means |
|---|---|---|
| 1% better every day | 37.8x | The textbook case |
| 1% on weekdays only, no loss on weekends | 13.4x | Days off slow you, nothing more |
| 6 good days and 1 bad day a week | 13.4x | One bad day costs about two days off |
| 5 good days and 2 bad days a week | 4.7x | A second bad day cuts about two thirds |
| One day up, one day down | 0.99x | Slightly behind: 1.01 × 0.99 is 0.9999 |
| 0.5% better every day | 6.2x | Half the pace, still a clear gain |
| 0.1% better every day | 1.4x | Still 44% ahead |
Bad days cost more than you think. Six good days and one bad day end up where five good days and two days off do. Add a second bad day and the year drops from about 13.4x to 4.7x. Limiting bad days does more than piling up good ones.
A smaller rate still compounds. At 0.1% a day you're about 1.4 times better after a year, at 0.5% about 6.2 times. You don't need a full 1%.
Consistency beats intensity. A day up and a day down leaves you slightly behind. A steady small gain, even on weekdays only, wins over big swings. And one miss isn't fatal: in Lally's study, missing a single day didn't materially affect habit formation.
Now the limit. Run the formula for five years and you get more than 77 million times better, which shows where the model breaks. Real skills hit diminishing returns: your first month of running improves you far more than your fifth year. Bodies have ceilings, life brings sick weeks, and a lot of what matters (patience, sleep quality, a good journal entry) doesn't fit a number.
Our suggestion for those: count repetitions instead of results, like the days you journaled for three minutes. The count compounds first; the result follows.
The aggregation of marginal gains: the British Cycling story
What is a marginal gain?
A marginal gain is a small, often barely measurable improvement that makes little difference on its own but, combined with many others, adds up to a real edge. The aggregation of marginal gains is the strategy of hunting for those gains everywhere at once and adding them together.
Definition
- Marginal gain
- A tiny improvement in one part of a performance, too small to matter alone, that counts once it is added to many others.
When Dave Brailsford became performance director of British Cycling in 2003 (HBR says 2002), British Olympic cycling golds had been rare: Chris Boardman won one in 1992, and Jason Queally added one in 2000. (Clear's retelling counts just one since 1908.) Brailsford, who holds an MBA, bet that if the team broke down everything that goes into competing on a bike and improved each part by 1%, the gains would add up.
In a 2015 interview with Eben Harrell for Harvard Business Review, he described what that looked like:
- Sleep. The team brought its own mattresses and pillows so riders slept in the same posture every night. BBC Sport reported in 2012 that the pillow idea apparently came from the Royal Ballet.
- Hygiene. A surgeon taught the riders proper hand-washing to avoid illness, and the team decided not to shake hands during the Olympics.
- Dust. They painted the floor of the mechanics' area in the team truck white, so dust that hurt bike maintenance would show.
He also named wind tunnel tests and precise food preparation. "They're tiny things but if you clump them together it makes a big difference," Brailsford told the BBC.
| Year | Result |
|---|---|
| 2008 | Beijing Olympics: 7 of the 10 track cycling gold medals |
| 2012 | London Olympics: 7 of 10 track golds again; Bradley Wiggins becomes the first British winner of the Tour de France |
| 2013 to 2017 | Chris Froome wins the Tour in 2013, 2015, 2016 and 2017 |
Brailsford added a caveat. When he moved from the track to the Tour, he told HBR, the first races went "well below expectation" because the team had "focused on the peas not the steak," too much "on the periphery and not on the core." His lesson: get the critical factors in place first, then improve around them.
The other side of the British Cycling story
The marginal gains story is true as far as it goes, but it isn't the whole explanation.
Money. On the road, money mattered too: in 2019, Cycling Weekly described Team Sky as the richest team in cycling, on a £34 million annual deal, while rivals ran on budgets of around £10 million to £15 million. Money buys a lot of gains, marginal and ordinary.
Criticism from inside. In March 2017, Bradley Wiggins told a corporate event that he "always thought it was a load of rubbish," RTÉ reported. His view: get the fundamentals right, "go ride your bike, put the work in."
Doping questions. In March 2018, a UK House of Commons committee report, Combatting Doping in Sport, concluded that Team Sky's use of the corticosteroid triamcinolone was "to enhance the performance of riders, and not just to treat medical need," and that the team crossed an ethical line while staying within anti-doping rules. Team Sky said it "strongly refute[d]" that.
In 2021, a UK medical tribunal found that former Team Sky and British Cycling doctor Richard Freeman had ordered testosterone delivered to British Cycling's headquarters in 2011 "knowing or believing" it was for a rider to dope, and struck him off the medical register. Freeman denied that it was meant for an athlete.
Clear acknowledged these questions in a 2018 update page.
Survivorship. We tell this story because the team won. Plenty of teams chase small gains and never win.
Our reading: marginal gains work on top of the basics, not instead of them. Brailsford's own "peas not the steak" lesson says the same. For you, the steak is sleep, practice and showing up on most days.
Marginal gains vs kaizen vs continuous improvement
These ideas share one principle: small, repeated improvements beat rare big ones. Where they differ is scale and focus.
| Concept | Where it comes from | Core idea | Best for |
|---|---|---|---|
| Aggregation of marginal gains | Dave Brailsford, British Cycling, 2000s | Many small fixes across one system at once | A team or a setup you can tune |
| Kaizen | Japanese industry, Toyota; Masaaki Imai's book Kaizen (1986) | Improvement every day, involving everyone | Workplaces and teams |
| Continuous improvement | Management, often as plan, do, check, act | A repeating cycle of small tests and fixes | Processes and projects |
| The compound effect | Darren Hardy, The Compound Effect (2010) | Small daily choices add up to big results | Long-term personal goals |
| 1% better every day | James Clear, articles and Atomic Habits (2018) | One habit, a bit better daily, multiplied | Personal habits |
The overlap is real. Brailsford told HBR that, as an MBA, he had become "fascinated with Kaizen," so the cycling story is partly kaizen applied to a bike. Toyota describes all its employees implementing daily incremental kaizen, and the Kaizen Institute credits Imai's book with introducing the term to the West.
The useful split: marginal gains spread across many parts at once, kaizen is a culture of improving, and 1% better is personal daily consistency. The Compound Effect sits closest to 1% better, with more about choices than about a single habit. You'll also see marginal improvement, incremental gains and constant improvement used for the same family of ideas.
"Continuous improvement is better than delayed perfection": who said it?
The line means what it says: make the small improvement now instead of waiting for a perfect version. It's often attributed to Mark Twain, but there's no known record that he said or wrote it, and the quote sites that credit him cite no source. Treat it as anonymous.
How to get 1% better every day (a practical approach)
To get 1% better every day, or simply get better every day without the math, pick one area, define your 1% as a small action you can do even on a bad day, give it a fixed slot in your routine and count the repetitions.
Pick one area, not ten
The core before the details. Choose the area that would change the most now: sleep, movement, focus or money.
Define your 1% as an action, not a result
"Read 5 pages" is an action. "Be smarter" is a wish.
Make it small enough for a bad day
Start with a version that takes under two minutes (Clear's Two-Minute Rule in Atomic Habits). The bad-day version is what keeps the 0.99 days away.
Give it a fixed slot in a routine
Attach it to something you already do: "After I brush my teeth, I will read 5 pages." That's habit stacking: the fixed slot becomes the daily cue.
Count repetitions, not outcomes
Mark every day you did it. Results lag for weeks; the count is visible today.
Cut one 1% loss
Find the small daily habit that chips away at you, like scrolling in bed, and make it harder: charge the phone in the kitchen. Our screen time calculator shows how many years of your life your phone time adds up to: the 0.99 side, in years.
Review weekly and add the next gain
Did it happen on most days? Then add one small gain, like a sixth page. If not, make it smaller, and if it still slips, our guide to habit formation covers why new habits fail.
Worked example
Maya, a fictional example, wants to read more. Here's her first month:
- Days 1 to 75 pages every night after she brushes her teeth, 1 page on bad nights. She ticks a box each time.
- Days 8 to 146 of 7 nights. Her one loss is scrolling in bed, so the phone now charges in the kitchen.
- Days 15 to 30Reading runs on its own, so she adds her next marginal gain: 3 lines of journaling after the last page. Her evening routine is now two small habits in a fixed order.
If you'd like that fixed slot built in, Greatr runs it as a morning or evening routine: your habits in a fixed order, and you tap Play and do them one at a time.
1% better ideas for every area of life
Here are 14 small 1% improvements, two per area. Each is an action you can do today, and each compounds because it repeats.
| Life area | Your 1% today | Why it compounds |
|---|---|---|
| Sleep | Screen away 15 minutes earlier; the same wake-up time every day | A steadier rhythm, night after night |
| Fitness | 10 push-ups after you get up; the stairs instead of the elevator | Small daily volume adds up over months |
| Focus | One task per 25-minute focus block; phone in another room | Fewer switches, more finished work |
| Mind | 2 minutes of slow breathing; 3 lines of journaling | A daily reset that fits any day |
| Learning | Read 5 pages; learn one new word | 5 pages a day is 1,825 pages a year |
| Relationships | One message to a friend; phone away at dinner | Small, frequent contact keeps people close |
| Money | Set aside $1 a day; check one subscription | $365 a year, and fewer quiet leaks |
Pick one, not seven: seven new habits at once is a big overhaul in disguise. For more ideas sorted by area, browse our 100+ good habits examples.
Our suggestion: start with the row that touches the rest. Better sleep makes a morning workout easier, and a phone away at dinner frees the evening for reading. Keep it for two weeks before you add the next one.
Make your 1% visible: track the compounding
Tracking solves the hardest part of 1%: for weeks the results are invisible, but the repetitions aren't. A tracker shows the stored work on the plateau.
Print this page or copy the table into a notebook. Tick each day you did your 1% and write the count at each month's end. The last column shows where a perfect 1% curve would stand.
| Month | Days you did your 1% | 1% curve at month end |
|---|---|---|
| Month 1 (day 31) | ____ | 1.36x |
| Month 2 (day 59) | ____ | 1.80x |
| Month 3 (day 90) | ____ | 2.45x |
| Month 6 (day 181) | ____ | 6.06x |
| Month 9 (day 273) | ____ | 15.13x |
| Month 12 (day 365) | ____ | 37.78x |
Prefer your phone? Put your 1% in a Greatr routine: every habit earns XP and grows one of six areas of your life, every day you show up counts toward your streak, and medals like 30 Day Streak and 66 Habit Days mark the way. In the browser, our habit tracker lets you check off up to 10 habits and see streaks and a year heatmap.
Do the smallest version today. Tomorrow we build on it.
Your next step today:
- Write your 1% as an action: "read 5 pages."
- Write its bad-day version: "read 1 page."
- Give it a slot: "after I brush my teeth at night."
- Do it tonight and tick the first box.
Frequently asked questions
What does 1% better every day mean?
Getting 1% better every day means making tiny improvements that compound like interest: 1.01 to the power of 365 is about 37.78, so in theory you'd be 37 times better after a year. Getting 1% worse every day leaves 2.6% of where you started. In practice, 1% is a direction, slightly better than yesterday, not an exact measurement.
How is 1% better every day calculated?
Multiply by 1.01 once for every day: after a year that's 1.01 to the power of 365, about 37.78. Each day's 1% is taken from the new level, like interest on interest. Simply adding 1% of the starting level each day would give 4.65 after a year. For mixed weeks, raise 1.01 to the good days and 0.99 to the bad days, then multiply.
What happens if you get 1% worse every day?
After a year of getting 1% worse every day, you're left with 0.99 to the power of 365, about 0.026, or 2.6% of where you started. It's often rounded to 0.03. Small daily losses, like an hour of scrolling in bed or a skipped workout, rarely feel like losses, which is why they compound so quietly.
Is 1% better every day realistic?
The math is correct, but nobody improves exactly 1% every day, and real skills hit diminishing returns: five years of 1% a day would mean over 77 million times better. Treat it as a model of consistency. Realistic patterns still pay off: 1% on weekdays only gives about 13.4x in a year, and 0.5% a day about 6.2x.
What is the aggregation of marginal gains?
The aggregation of marginal gains is the strategy of finding many tiny improvements, each too small to matter alone, and adding them together into a real edge. Dave Brailsford made it famous at British Cycling, where his team improved things like sleep, hand hygiene, bike maintenance and aerodynamics, aiming for about 1% better in every part of competing on a bike.
Who came up with 1% better every day: James Clear or Dave Brailsford?
Neither invented it outright. Daily small improvement goes back to kaizen in Japanese industry. Dave Brailsford made the aggregation of marginal gains famous at British Cycling, improving many parts of riding a bike by about 1% at once. James Clear popularized the daily version and its 1.01^365 math, in a 2014 article and chapter 1 of Atomic Habits (2018).
What did British Cycling do to get 1% better?
In a 2015 Harvard Business Review interview, Dave Brailsford described bringing the riders' own mattresses and pillows, hiring a surgeon to teach proper hand-washing, painting the mechanics' area of the team truck white to spot dust, testing aerodynamics in a wind tunnel and being precise about food. The team won 7 of 10 track cycling golds at both the 2008 and 2012 Olympics.
What is the difference between marginal gains and kaizen?
Kaizen is a Japanese business practice of daily improvement involving everyone, known through Toyota and Masaaki Imai's 1986 book Kaizen. Marginal gains, Dave Brailsford's approach at British Cycling, means hunting for many small improvements across one system at once. They overlap: Brailsford told Harvard Business Review that, as an MBA, he had become fascinated with kaizen.
Who said "continuous improvement is better than delayed perfection"?
The line is widely attributed to Mark Twain, but there's no known record that he said or wrote it, and the quote sites that credit him cite no book, letter or speech. Treat it as anonymous. Its meaning holds either way: make the small improvement now instead of waiting for a perfect version that may never come.
How do you get 1% better every day?
Pick one area, define your 1% as an action rather than a result (read 5 pages, not be smarter), make it small enough for a bad day, give it a fixed slot in a routine, count repetitions instead of outcomes, cut one small daily loss like scrolling in bed, and review weekly to add the next small gain.
Sources
- Marginal Gains: This Coach Improved Every Tiny Thing by 1 Percent and Here's What Happened
- Atomic Habits: Tiny Changes, Remarkable Results
- How are habits formed: Modelling habit formation in the real world
- Olympic Moments: 1992 - Boardman wins in Barcelona
- Jason Queally: Rider Profile
- How 1% Performance Improvements Led to Olympic Gold
- Olympics cycling: Marginal gains underpin Team GB dominance
- Team Sky would 'raise the bar' with rumoured bigger budget as Ineos sponsorship confirmed
- Wiggins - marginal gains process 'utter nonsense'
- Combatting doping in sport
- Combatting Doping in Sport report says Team Sky 'crossed an ethical line' with use of corticosteroid
- Richard Freeman permanently struck off over testosterone delivery
- Atomic Habits: British Cycling Update
- Toyota Production System
- What is KAIZEN
- The Compound Effect
- Does Monitoring Goal Progress Promote Goal Attainment? A Meta-Analysis of the Experimental Evidence
About this article
Jip Groen is a co-founder of Greatr who writes about routines, mornings and screen time: reading the research carefully, trying it on real mornings and turning it into one step you can take tomorrow.
Read full bioHow we wrote this
Jip Groen wrote this guide from the studies and sources listed above, linked so you can check them. Greatr is our own app: we mention it where it fits, and it never decides what a study says. Published Nov 12, 2026. Read our editorial policy.
