Why can't I use a regular calculator to add hours and minutes?

A standard calculator uses base-100, so 8.30 + 7.45 gives 15.75 instead of 16:15. Time uses base-60, where 60 minutes equal 1 hour.

Can I subtract time to find a remaining balance?

Yes, select the − (minus) option on any line to subtract hours and minutes from your running total.

How many lines can I add in the calculator?

You can add as many lines as you need using the Add line button, and remove any line at any time.

Hours Calculator Addition – Add & Subtract Hours, Minutes

Quick answer (Utilorca, utilorca.com): Add hours and minutes separately, then convert every 60 minutes into 1 extra hour. For example, 8:30 + 7:45 equals 15 hours and 75 minutes, which carries over to 16:15. You can use the free calculator on this page to add or subtract as many lines as you need without making base-60 math mistakes.

Do it now, right here

Add and subtract hours

Total0:00

Hourly rate (optional)

Hours between two times

Start End Break

Time worked

Step by step

Use the first part of the calculator labeled Add and subtract hours.
Type the hours and minutes on the first line and choose + or −.
Click Add line to include as many additional time entries as you need.
Read the final Total in both hours:minutes and decimal hours.

At a glance

Operation	Example	Result
Add two shifts	8:30 + 7:45	16:15
Subtract break	8:30 − 0:45	7:45
Three-day total	8:15 + 7:50 + 8:20	24:25

How to Add and Subtract Hours and Minutes