What Is the Sobriety Calculator?
The Sobriety Calculator counts exactly how long you have been sober and estimates how much money you have saved by no longer spending on alcohol, tobacco, or other substances. Enter the date you started your sober journey and the amount you used to spend per day, and the calculator instantly shows your days, weeks, and years sober plus your cumulative savings.
How to Use It
Pick your sobriety start date (year, month, day). Enter the amount you previously spent in a typical day. Optionally enter an "as of" date to measure to a specific milestone instead of today. The tool floors partial days so the count reflects only full days completed.
The Formula Explained
Days sober is the difference between today (or your chosen as-of date) and your start date, in whole days: $$\text{SoberDays} = \left\lfloor \frac{\text{Today} - \text{StartDate}}{1\ \text{day}} \right\rfloor$$ Money saved is simply $$\text{SoberDays} \times \text{DailySpend}$$ Weeks are days divided by 7 (floored) and years are days divided by 365.25 to account for leap years.
Worked Example
Suppose you became sober 10 days ago and used to spend $15 a day. Days sober = 10. Money saved = $$10 \times \$15 = \$150$$ Weeks = \(\lfloor 10 / 7 \rfloor = 1\). Years = \(10 / 365.25 \approx 0.03\).
FAQ
Does it count today? The count is full days elapsed from your start date, so the current in-progress day is not counted until it completes.
What currency is money saved in? It uses whatever currency you enter for daily spend — the result is just daily spend \(\times\) days, unit-agnostic.
Why use 365.25 for years? Averaging in the leap day every four years gives a more accurate long-term year count.
