Sobriety Calculator
Enter your sobriety date to see exactly how long you've been sober, and how close you are to your next milestone.
How this is calculated
This tool counts the exact number of calendar days between your sobriety date and today — the same leap-year-safe day count used across ZenCountdown. Once you're past the common early milestones (30, 60, 90 and 180 days) and the 365-day mark, it switches to tracking your actual yearly anniversary date, computed from the real calendar rather than a rounded 365-day estimate, so it stays accurate no matter how many years you've been counting.
The count starts at zero: on your sobriety date the result is 0 days, and the next day it's 1. If you count the sobriety date itself as day one, add one to the figure shown. Total weeks is the day count divided by seven, rounded down; total months counts completed calendar months.
Worked example
A sobriety date of March 1, 2026, checked on October 6, 2026, gives 219 days — 31 total weeks and 7 total months. For that start date, each milestone falls on:
| Milestone | Date reached |
|---|---|
| 30 days | Tuesday, March 31, 2026 |
| 60 days | Thursday, April 30, 2026 |
| 90 days | Saturday, May 30, 2026 |
| 180 days | Friday, August 28, 2026 |
| 365 days | Monday, March 1, 2027 |
With the 180-day mark behind it, the tile shows 146 days to the 365-day milestone.
Day counts versus calendar dates
The milestones are counted in days, so they don't always match calendar months. Thirty days after March 1 is March 31, not April 1. Six calendar months after March 1 is September 1 — 184 days — so the 180-day mark arrives four days earlier. Depending on the start date, six calendar months is 181 to 184 days, which puts the 180-day mark one to four days ahead of it.
The 365-day mark is a day short of the calendar anniversary when a February 29 falls in the first year; after that, the tool counts to each yearly anniversary of your date. A February 29 sobriety date has its anniversary counted on March 1 in years without one. On the day you reach a milestone, the tile has already moved on to the next — on day 90, it shows 90 days to the 180-day mark.
Frequently asked questions
What counts as day one?
Day one is whatever calendar date you enter — most people use the day they stopped. Conventions differ on whether that first day itself counts as a full day, so use whichever your program or app already tracks; this calculator just counts the days between that date and today.
What milestones does this track?
The common recovery milestones: 30, 60, 90 and 180 days, then your 1-year anniversary and every year after that — the same set most 12-step programs and recovery apps mark with chips or badges.
Is my sobriety date stored anywhere?
No. The date you enter never leaves your browser — nothing is saved, logged, or sent to a server, and reloading the page clears it.
Why does the 180-day milestone come before my six-month date?
Because the tool counts days, not months. Six calendar months is 181 to 184 days depending on which months are involved, so the 180-day mark always arrives one to four days before the same date six months on.