Time Converter

Convert between seconds, minutes, hours, days, and weeks.

Fill in the fields below to calculate

About Time Units

The second (s) is the SI base unit of time. All larger units are derived from it — a minute is exactly 60 seconds, an hour 3,600, and a day 86,400.

Month and year values here use average lengths (30.4375 days/month, 365 days/year) and are approximate.

Quick Reference

Related Calculators

Pro Tips

There are 1,000 milliseconds in a second — useful when working with APIs and performance timings.

A leap year has 366 days (31,622,400 seconds) — remember to account for this in date calculations.