Cost of a Habit Calculator
See what a small daily habit really costs per week, month, year, and decade — and what that money could grow to if you invested it instead.
Formula: Yearly cost = cost × times per day × 365.25
About the Cost of a Habit Calculator
The Cost of a Habit Calculator gives you an instant answer from just a few inputs — cost each time, times per day. It runs entirely in your browser, so the numbers you enter stay private and never touch a server, and the result recalculates the moment you change a value. It's free to use with no sign-up, no limits, and nothing to install. Under the hood it applies the formula Yearly cost = cost × times per day × 365.25.
Worth Knowing
The eye-opener here isn't the daily number — it's compounding. Spending five dollars a day feels trivial, but the same money invested steadily at a historical stock-market average would more than double over a decade, which is why the 'if invested instead' figure is usually far larger than the raw ten-year total. That gap is the real cost of a habit. Treat the investment estimate as illustrative: it assumes a constant 7% annual return, and real markets rise and fall.
How to Use
- Enter Cost each time into the first field of the Cost of a Habit Calculator.
- Fill in the rest: Times per day.
- Your result appears instantly as you type — there's no submit button or page reload.
Formula
Yearly cost = cost × times per day × 365.25