Tommis Simple Time Calculator

Simple tool to add and subtract hours and minutes.

Easily add and subtract hours and minutes.

Enter up to three digits to provide only minutes. For example 90 is interpreted as 1 hour 30 minutes.

Enter exactly four digits to provide hours and minutes. For example 0030 is interpreted as 30 minutes.

The colon separates hour and minutes, so :30 is interpreted as 30 minutes, whereas 2: is interpreted as 2 hours.

After you have entered a time, tap + or -. Then enter the next time. Repeat this as often as required or tap = to get a result. The result is used as the next time, so you can continue with + or -.