🔥 Habit Streak Calculator

See how long your current streak is, how close you are to your next milestone, and your completion rate since you started.

Streak Start Date

Days Missed Since Start

Goal (days) — optional

How to Use

Enter the date you started (or last restarted) your habit streak.
If you've missed any days since then, enter how many — this affects your completion rate, not your current streak.
Optionally set a personal goal in days (many people use 21, 30, 66, or 90).
Click Calculate to see your stats and progress toward the next milestone.

Why Milestones Matter

Research on habit formation generally points to somewhere between 18 and 254 days for a behavior to feel automatic, with 66 days being a commonly cited average — there's no single magic number that fits everyone. Tracking your streak against milestones like 7, 30, 66, and 100 days gives you small wins to aim for along the way, rather than one distant, abstract goal.