Time Calculator
Add or subtract hours, minutes and seconds, or find how long there is between two clock times — breaks and overnight sessions included.
How to use the time calculator
Use the first card to add or subtract two durations — leave any field blank and it counts as zero. Use the second card to work out the gap between a start and end time, deducting breaks if you took any.
Worked example
A study session from 18:30 to 21:15 with a 15 minute break is 2 hours 45 minutes minus 15 minutes = 02:30:00, or 2.5 decimal hours.