Time Calculator: Add or Subtract Two Times

Written by:

Below is a time calculator. Enter two durations of time using days, hours, minutes, and seconds, and add or subtract the two to combine time math.

We also have a time duration calculator that lets you enter two discrete dates and times, a time multiplication calculator, and a time division calculator.

Time Calculator: Time Arithmetic

Time Calculations: They Can Be Tricky

This tool is useful to find the cumulative amount of time two things took, or alternatively to find the difference in time between two timespans.

For example, you might add two times together to figure out your total duration for two events. Or perhaps, you want to see how long something will be if you've already experienced it for some time and can subtract.

Either way, this tool has you covered - just enter your own hours, minutes, seconds, and days and we'll do the time math.

Using the Time Calculator

In this tool, you add or subtract two time durations or your choice. In order:

  1. At the top of the tool, enter the days, hours, minutes, and seconds for the first timespan.
  2. In the middle of the tool, choose to add or subtract the two timespans.
  3. At the bottom of the tool, enter the days, hours, minutes, and seconds for the second timespan.

When you finish that, hit the Calculate Time button and we will return the combined timespan for both times.

Next, see the other calculators. Have fun!



PK started DQYDJ in 2009 to research and discuss finance and investing and help answer financial questions. He's expanded DQYDJ to build visualizations, calculators, and interactive tools.

PK lives in New Hampshire with his wife, kids, and dog.

Don't Quit Your Day Job...

DQYDJ may be compensated by our partners if you make purchases through links. See our disclosures page. As an Amazon Associate we earn from qualifying purchases.
Sign Up For Emails
linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram