How this calculator works
These are fixed durations: one day is exactly 24 hours and one week is seven days. Calendar months, leap years and daylight-saving transitions require date tools instead.
The formula
Base amount = value × source factor
Target amount = base amount / target factorA quick example
1 hour = 60 minutes = 3,600 seconds.
How to use this calculator
- Enter a value using a decimal point.
- Choose the source and target units.
- Read the live result or swap units to reverse the direction.
A few common questions
Which convention does this converter use?
These are fixed durations: one day is exactly 24 hours and one week is seven days. Calendar months, leap years and daylight-saving transitions require date tools instead.
Can I reverse the conversion?
Yes. Swap exchanges the units, keeps your input amount and calculates again.
Why is the displayed result rounded?
The calculation uses the full stored factor. Results show up to six decimal places, with scientific notation for very small or large amounts.
Reference: NIST conversion factors