Time Calculator

What the Time Calculator does

The Time Calculator adds or subtracts hours and minutes between two time values, automatically handling the carry-over past 60 minutes or 24 hours that makes manual time math error-prone.

How to use it

1. Enter the first time value in hours and minutes.
2. Choose whether to add or subtract.
3. Enter the second time value, then click Calculate.

Common uses

• Working out total hours worked from a shift's start and end time, or across multiple shifts.
• Calculating elapsed time between two events for a timesheet or report.
• Adding travel time segments together to get a total journey duration.
• Subtracting a break duration from a total shift length.
• Checking a schedule or itinerary where time blocks need to add up correctly.

Good to know

Results roll over correctly past 60 minutes into the next hour automatically, so you don't need to manually convert minutes into decimal hours or carry the extra digit yourself — a common source of manual timesheet errors this tool sidesteps entirely.

Manual time arithmetic is a common source of small errors specifically because time doesn't work in base 10 — 45 minutes plus 30 minutes isn't 75 minutes on a clock face, it's 1 hour 15 minutes, and remembering to carry the extra hour correctly is exactly the kind of easy-to-miss step that leads to timesheet and scheduling errors when done by hand repeatedly.