Time Percentage Calculator

Calculate time spans in percent. How much is a certain time span compared to another time span. Enter two time values or one time value and the percentage. The line left empty will be calculated.

Example: if you sleep 7 hours and 45 minutes (time 1) a day (time 2: days=1), you slept 32.29% of the day.

For questions like: in a certain time span x, y% are done, how long does it take to reach 100%, see Rule of Three with Time Values.