Free Date & Time Tools
Do the date math without counting on your fingers. These free date and time tools calculate ages, differences between dates, durations, business days and timestamps — instantly and in your browser. No signup, nothing uploaded.
Age Calculator
Find your exact age in years, months and days.
Date Difference Calculator
Count the days, weeks, months and years between two dates.
Business Days Calculator
Count working days between two dates, weekends excluded.
Leap Year Checker
Check if any year is a leap year, with the rule explained.
Unix Timestamp Converter
Convert Unix timestamps to dates and back, live.
Date Formatter
Format a date as ISO, US, EU, long or RFC style.
Time Duration Calculator
Work out the duration between two clock times.
Days Until Date
Count down the days and weeks to any future date.
Add Days to Date
Add or subtract days from any date instantly.
Hours Between Times
Hours and minutes between two times, even overnight.
Week Number Calculator
Find the ISO-8601 week number for any date.
Countdown Timer
A simple countdown timer with start, pause and reset.
Date & Time tools — questions
Are these date tools free?
Yes — every date and time tool on FAHAQ is free with no signup and no limits.