Date maths, done right.
Work out your exact age, the days between two dates, a countdown to any date, business days, ISO week numbers and the weekday of any date. Leap years and month-ends handled correctly, with no sign-up.
Why count dates here
Most date calculators bury one tool under a wall of ads and pop-ups, and many quietly round months to 30 days. This is a clean set of calculators that count the real calendar and just give you the answer.
Leap-year accurate
Every calculation counts real calendar days, so leap years and month lengths are handled, not approximated.
100% free
Every calculator, with no paid tier, no locked options and no limit on how many dates you check.
No sign-up
No account, no login, no email wall. Pick a date and read the answer.
Instant as you type
Results update the moment you change a date, with a full breakdown in view.
Works offline
Load a calculator once and it keeps working with no connection.
7 date calculators, no catch
Pick a calculator and start instantly. Every one runs in your browser, free.
Age & differences
Your exact age, gaps between dates and countdowns.
Planning
Add or subtract time, and count working days.
Calendar facts
Week numbers and the weekday of any date.
Counted, not estimated.
Every calculator works day by day across the real calendar, so leap years, the different lengths of months and year boundaries all come out right. It runs in your browser, so nothing is sent anywhere and there is no limit on how many dates you check.
Built by CodingEagles- Leap-year accurate
- 100% free
- No sign-up, no app
- Instant as you type
- Works offline after first load
The full breakdown
Each calculator shows the answer plus the totals behind it, in days, weeks, months and years, so you see the whole picture.
No ads in the way
The calculator is the first thing on the page, with no pop-ups or walls between you and the answer.
Works on any device
Runs in any modern browser on phone, tablet and desktop, with no app to install.