Convert hours into seconds, minutes, days and weeks — and convert back again.
seconds
How to use this tool
Type the amount you want to convert.
Choose seconds, minutes, hours, days or weeks.
All five units update at once, so you can read off whichever you need.
Change the unit or value and the equivalents update live — no separate reverse calculator is needed.
Formula & worked example
1 hour = 3,600 seconds = 60 minutes = 0.0417 days = 0.0060 weeks. Conversely, 90 minutes = 1.5 hours = 5,400 seconds.
Limitations — read this before you rely on it
This converts time units only; it does not measure elapsed time between two clock times (use the Time Duration Calculator for that) and it ignores leap seconds and calendar quirks.
Frequently asked questions
3,600 seconds: 60 seconds per minute x 60 minutes. That is the single most-asked hour conversion, and the one this calculator answers first.
60 minutes. To convert minutes to hours, divide by 60 — so 90 minutes is 1.5 hours.
Divide hours by 24. So 48 hours is 2 days and 72 hours is 3 days.
No. This is a unit converter. For elapsed time between two clock times, use the Time Duration Calculator; for shifts with breaks and pay, use the Time Clock Calculator.
Yes — 1 week is 168 hours (7 days x 24 hours).