To calculate in Excel how many hours someone has worked, you subtract the start time from the end time — the difference is the hours worked.

Unlock the full potential of your iPad calculator app with our beginner's guide on how to use math notes on iPad. See how it can automatically calculate math equations and show results as you write.

The new Calculator in Windows 11/10 is elegant and feature-rich. Learn how to use it in the Standard, Scientific, Programmer and Conversion modes.