Free tool

Habit streak calculator

Put in the day you started and the last day you missed, if there was one. You get your current streak, how consistent you have really been since day one, and the dates of your next milestones.

The Long Haul quest art from XP Tracker, Warrior version

Your streak

How the calculator counts

Your current streak is the number of days in a row from the later of two dates: the day you started, or the day after your last miss. It ends today if you ticked the box, or yesterday if you haven't done today's yet. An unfinished today does not break anything. You still have until bedtime.

Your consistency rate uses the whole period since day one:

consistency = (days since start − days missed) ÷ days since start

Say you started 60 days ago and missed 6 days along the way, the last one 12 days ago. Your streak is 12 days. Your consistency is 54 out of 60, or 90 percent. The streak looks small. The habit is doing well.

Milestone dates assume you keep going from today without a miss. They are targets to aim for, not predictions.

Close the Day quest art from XP Tracker, Druid version — Ending the day with a quick check-in is the easiest place to tick a habit off.

Why consistency matters more than the streak

A streak is a great motivator right up until you miss a day. Then the counter drops to zero, and many people stop altogether because starting from zero feels pointless. The research does not support that feeling. In the habit study by Phillippa Lally and colleagues (2010, European Journal of Social Psychology), 96 people repeated a new daily habit for 12 weeks. Missing a single day did not materially slow the habit becoming automatic.

So keep both numbers in view. Use the streak for the push it gives you on an ordinary Tuesday. Use the consistency rate to judge whether the habit is working. James Clear's rule from Atomic Habits (2018), "never miss twice", sits between the two: one missed day is normal, two in a row is the start of a new pattern.

Tips for keeping a streak alive

Have a minimum version. Decide now what counts on a bad day: one push-up, one page, one minute. A tiny version done on a hard day still counts.
Plan your rest days. A planned day off is part of the plan. A surprise miss is the one that hurts motivation.
Tick it off at the same time each day. Many people check off habits in the evening, so a missed morning habit gets a second chance.
Count the right thing. If you train three times a week, a daily streak will always look broken. Track weeks in a row instead.

Limits

The calculator trusts the dates you enter and uses your device's date. It does not save anything, so keep your start date written down somewhere, on a printable habit tracker for example. If your streak just broke, getting back on track walks through the next three days.

Your next step: check today's box once the habit is done, and write your next milestone date where you will see it.

Questions people ask

How do I calculate my habit streak?

Count the days in a row you have done the habit, ending today if you did it today or yesterday if you haven't yet. If you missed a day, the streak starts again the day after that miss. The calculator does this count for you from two dates.

Does missing one day ruin a habit?

No. In the habit study by Lally and colleagues (2010), missing a single day did not materially change how quickly the habit became automatic. What matters more is that you come back the next day. See what to do after a broken streak.

What is a good consistency rate for a habit?

There is no official number. As a rough guide, if you are doing the habit on 80 percent or more of days, it is well on its way. Below about 50 percent, the habit is usually too big or the cue is unclear, and making it smaller helps more than trying harder.

Should today count in my streak?

Only once you have done it. Tick the box when today is done. If you leave it unticked, the calculator counts up to yesterday, so your streak is still alive and today is still open.

Is a long streak the same as a habit?

Not quite. A streak counts repetitions; a habit is when the action starts to feel automatic in its usual situation. Long streaks help, but some habits feel automatic after a few weeks and others take many months. Our habit formation calculator gives a realistic range.