Habit Streak Compounding
Calculator
Results
- Final index
- 4.740359 index
- Days held
- 312 d
- Total gain (%)
- 374.035938%
- Cost of missed days
- 1.403573 index
Projected path over the weeks
- Compounded index
- Perfect streak index
Week-by-week schedule
| 1 | 1.03 | 6.00 | 1.04 |
| 2 | 1.06 | 12.00 | 1.07 |
| 3 | 1.09 | 18.00 | 1.11 |
| 4 | 1.13 | 24.00 | 1.15 |
| 5 | 1.16 | 30.00 | 1.19 |
| 6 | 1.20 | 36.00 | 1.23 |
| 7 | 1.23 | 42.00 | 1.28 |
| 8 | 1.27 | 48.00 | 1.32 |
| 9 | 1.31 | 54.00 | 1.37 |
| 10 | 1.35 | 60.00 | 1.42 |
| 11 | 1.39 | 66.00 | 1.47 |
| 12 | 1.43 | 72.00 | 1.52 |
| 13 | 1.48 | 78.00 | 1.57 |
| 14 | 1.52 | 84.00 | 1.63 |
| 15 | 1.57 | 90.00 | 1.69 |
| 16 | 1.61 | 96.00 | 1.75 |
| 17 | 1.66 | 102.00 | 1.81 |
| 18 | 1.71 | 108.00 | 1.87 |
| 19 | 1.77 | 114.00 | 1.94 |
| 20 | 1.82 | 120.00 | 2.01 |
| 21 | 1.87 | 126.00 | 2.08 |
| 22 | 1.93 | 132.00 | 2.16 |
| 23 | 1.99 | 138.00 | 2.23 |
| 24 | 2.05 | 144.00 | 2.31 |
| 25 | 2.11 | 150.00 | 2.39 |
| 26 | 2.18 | 156.00 | 2.48 |
| 27 | 2.24 | 162.00 | 2.57 |
| 28 | 2.31 | 168.00 | 2.66 |
| 29 | 2.38 | 174.00 | 2.75 |
| 30 | 2.45 | 180.00 | 2.85 |
| 31 | 2.53 | 186.00 | 2.95 |
| 32 | 2.61 | 192.00 | 3.06 |
| 33 | 2.68 | 198.00 | 3.16 |
| 34 | 2.77 | 204.00 | 3.28 |
| 35 | 2.85 | 210.00 | 3.39 |
| 36 | 2.94 | 216.00 | 3.51 |
| 37 | 3.03 | 222.00 | 3.64 |
| 38 | 3.12 | 228.00 | 3.77 |
| 39 | 3.21 | 234.00 | 3.90 |
| 40 | 3.31 | 240.00 | 4.04 |
| 41 | 3.41 | 246.00 | 4.18 |
| 42 | 3.51 | 252.00 | 4.33 |
| 43 | 3.62 | 258.00 | 4.49 |
| 44 | 3.73 | 264.00 | 4.65 |
| 45 | 3.84 | 270.00 | 4.81 |
| 46 | 3.96 | 276.00 | 4.98 |
| 47 | 4.08 | 282.00 | 5.16 |
| 48 | 4.21 | 288.00 | 5.34 |
| 49 | 4.33 | 294.00 | 5.53 |
| 50 | 4.46 | 300.00 | 5.73 |
| 51 | 4.60 | 306.00 | 5.93 |
| 52 | 4.74 | 312.00 | 6.14 |
Comparison
| Scenario | Final index | Days held |
|---|---|---|
| Doing nothing | 6.14 | 364.00 |
| Your plan | 4.74 | 312.00 |
Formula
index = (1 + g)^(days held); days held = (7 − missed) × weeks= 4.74
Note
These are deliberately simplified models. They assume a constant rate and ignore metabolic adaptation, water weight, hormones, illness, medication, sleep and stress, so individual results vary widely — two people following the same plan can land far apart. The 7700 kcal per kilogram of body fat figure is a population average, not a personal constant. A large deficit, a fast mileage or load ramp, or a very low target body fat can be harmful; treat any flagged rate as a reason to slow down. This is NOT medical, dietetic or coaching advice — consult a qualified doctor, registered dietitian or accredited coach before acting on any projection here, and especially if you are pregnant, under 18, or managing any medical condition.
More in Health progress
See all →Frequently asked questions
What does 'compounding' mean in the context of a habit streak?+
It refers to small, consistent daily actions producing outsized results over a long time period, similar to compound interest — the calculator models how a marginal daily improvement or consistent habit accumulates value far beyond what a single day's effort would suggest.
Why does missing one day feel like it undoes so much progress?+
Psychologically, breaking a visible streak can feel like starting over, but the actual underlying progress (skill, fitness, savings) from previous days is rarely erased by a single miss — the calculator distinguishes streak length from cumulative benefit, which don't have to reset together.
Does the model assume every single day must be perfect?+
Not necessarily — many versions allow for a minimum threshold ('don't break the chain, but a smaller effort still counts') rather than requiring identical daily effort, since some consistency most days usually outperforms occasional bursts of perfect effort.
How long does it typically take for compounding effects to become noticeable?+
Small daily habits often feel like they produce negligible results for weeks or months before the cumulative effect becomes visible — the calculator's curve is usually flat early and steepens later, which mirrors how compounding works in any domain.
What's the practical lesson from seeing the compounding curve?+
The main takeaway is usually that consistency matters more than intensity — a small habit sustained for a year outperforms a large effort sustained for only a few weeks, which the projected curve illustrates numerically.