# Time Conversion Calculator

Units of measure conversion calculators and formulas for time units

## Convert time units

This calculator can be used to convert time measurements. Select the unit of measurement that you know and enter its value. Then click on 'Calculate'.

The number of decimal places or the floating point representation can be set.

### Time unit calculator

 Enter the unit of measure and the time Planck time atomic unit nanosecond microsecond millisecond second minute hour day week month (30) year year (Julian) year (Gregorian) century (Julian) Decimal places Float 0 1 2 3 4 6 8 10
 Results Planck time tp atomic unit au nanoseconds ns microseconds µs milliseconds ms seconds s minutes min hours h days d weeks wk month mo year (Calendar) y year (Julian) y year (Gregorian) y century (Julian) C

Planck time:   $$\displaystyle t_P=\sqrt{\frac{hG}{c^5}} ≈ 5.39116 · 10^{-44}s$$

atomic unit:   $$\displaystyle l_{au} = 2.418884326 10^{-17} s$$

$$\displaystyle 1h=60min=3600s$$

$$\displaystyle 1s =10^3ms=10^6µs=10^9ns$$

month:   30 days

year (Calendar) = 365 days

year (Julian) = 365.25 days

year (Gregorian) = 365.256363 days

century (Julian) = 100 year (Julian)