Habit Cost Calculator
What a daily habit really costs over time.
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A $5 coffee feels trivial — until you see it as $1,800 a year. Enter what you spend and how often, and this calculator scales it up to the monthly, yearly, and multi-year totals that make a small, repeated spend suddenly feel real.
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What Does a Daily Habit Cost? — The Quick Answer
Multiply the spend by how many times it happens in a year. A daily spend multiplies by about 365, a weekly one by 52, and a monthly one by 12 — then multiply again for the 5- and 10-year picture.
Shortcut
yearly cost = amount × times per year (daily ×365, weekly ×52, monthly ×12)
What a daily spend adds up to
| Per day | Per year | Over 10 years |
|---|---|---|
| $3 | ~$1,096 | ~$10,958 |
| $5 | ~$1,826 | ~$18,263 |
| $10 | ~$3,653 | ~$36,525 |
| $15 | ~$5,479 | ~$54,788 |
This is the plain cash spent. If that money were invested instead of spent, it could grow substantially more over a decade — the What-If-Invested calculator shows the opportunity cost with compound growth.
How It Works
The Method
Scaling a repeated spend
Formula
daily rate = amount ÷ (days in the chosen period) yearly = daily rate × 365.25; 10-year = yearly × 10
Variables
Days per year
Using 365.25 (the average including leap years) rather than 365 keeps multi-year totals accurate. A daily $5 habit is $5 × 365.25 = about $1,826 a year.
The long view
Stretching the yearly figure to 5 and 10 years is what makes a 'small' habit visible: $5 a day is over $18,000 across a decade, before counting what the money could have earned if saved.
Note: This shows money spent, not money lost to inflation or missed investment returns. For the fuller 'what if I'd invested it' picture, pair this with the What-If-Invested calculator.
Last updated: October 6, 2026
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Frequently Asked Questions
How much does a daily coffee cost per year?
A $5 daily coffee costs about $1,826 a year (5 × 365.25) and roughly $18,263 over ten years. A $3 coffee is about $1,096 a year. Seeing the annual and ten-year totals is what makes a 'small' daily spend feel significant.
How do I calculate the cost of a habit?
Multiply the amount by how often it happens in a year: a daily spend by about 365, a weekly spend by 52, a monthly spend by 12. This calculator does that and then projects it over 5 and 10 years so you can see the cumulative effect.
Does this include what the money could have earned if invested?
No — this shows the plain amount spent. Money invested instead would typically grow with compound interest, often making the true opportunity cost noticeably higher. The What-If-Invested calculator estimates that growth.
Why use 365.25 days instead of 365?
Because of leap years, the average year is 365.25 days. Using it keeps the yearly and ten-year totals accurate — over a decade, the quarter-day a year adds up to a couple of extra days' worth of the habit.