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Leap Years List Calculator

List every leap year in the range you choose, with the count, the century exceptions highlighted (1700, 1800 and 1900 skipped; 1600 and 2000 kept) and a one-click copy of the whole list.

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Leap Years List Calculator works straight from this page — free, instant, nothing to install. It covers 1700, 1800 and 1900 skipped; 1600 and 2000 kept — adjust any of them and the result follows immediately.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What does Leap Years List Calculator do?

List every leap year in the range you choose, with the count, the century exceptions highlighted (1700, 1800 and 1900 skipped; 1600 and 2000 kept) and a one-click copy of the whole list.

What does it take into account?

It factors in 1700, 1800 and 1900 skipped; 1600 and 2000 kept. Change any of them and the output follows immediately.

When would I actually use this?

Answering a scheduling question exactly: how many working days until a deadline, what date falls sixty days out, and what time that is for a colleague elsewhere.

What is the most common mistake?

Counting days by subtracting dates and forgetting whether the endpoints are included. Inclusive and exclusive counts differ by one, which is the difference between meeting a deadline and missing it.

How is Leap Years List Calculator different from Leap Year Calculator?

They sit next to each other but answer different questions: Leap Year Calculator is the one to open when you need it to check whether any year is a leap year with the /4, /100, /400 rule shown step by step, plus the previous and next leap years, the days left until 29 February and the Julian-calendar caveat before 1582. Pick whichever matches what you're starting from — both are free.

Is there a tool for the next step?

Next Leap Year Calculator is the closest one after this: The next leap year after any year you enter, the twelve that follow, and the gap between each one — including the eight-year jump from 2096 to 2104 that most people never notice.

What else is worth having open alongside it?

When Is a Leap Year? Calculator and Packing list generator — they come up in the same task often enough to be worth a second tab.

Where do the figures come from?

Calendar arithmetic follows the proleptic Gregorian calendar and the IANA time-zone database, so daylight-saving transitions and leap years are handled. Public holidays vary by country and region and are not assumed.

Further reading

All guides →
ExplainerLeap Years: The Rule, the Exception, and the Exception to the ExceptionDivisible by four, except centuries, except centuries divisible by four hundred. The three-line rule exists because the tropical year is not 365.25 days, and the arithmetic behind it explains ten deleted days in 1582 and a calendar that repeats exactly every 400 years.ExplainerWorking Out an AnniversaryCounting back and counting forward are two different sums, and they disagree by a year on the day itself. What this calculator does with 29 February, what other date libraries do, and where the traditional and modern gift lists actually come from.ExplainerDate Arithmetic Is Harder Than It Looks"One month later" has no single correct answer, and every date library has had to pick one. Month addition is neither associative nor invertible, a day is not always 24 hours, and age is not days divided by 365.25.ExplainerWhat Is a Leap Year? The /4, /100, /400 Rule ExplainedWhy some years have a February 29, how the divisible-by-4, -100 and -400 rules combine, and how to check any year quickly.GuideThe Pomodoro Method: How Long to Work and How Long to RestTwenty-five and five come from Francesco Cirillo's method, not from a trial. What the research actually measured is task switching and the cost of getting back in — and the reason a fixed interval helps is not that 25 minutes is optimal. Plus what the planner really returns, including the long break it quietly leaves out.GuideWhat a Meeting Costs the Company, and What the Number Is ForSalary is not the cost. The ticker applies no loaded-cost multiplier of its own, so the rate box is where you have to put it. And the number is for one comparison: a recurring meeting against the written update that would replace it.