Calculate Several Time Durations at Once

This calculator lets you quickly calculate several units of time. You can perform additions or subtractions.

How additions work

In the "duration or time" area, enter the desired units, adding a "+" between each time to add them together.

How subtractions work

To use subtractions, put a "-" between each duration.

Mixing operations

You can combine addition and subtraction operations.

Duration syntax

The program understands durations in the following formats:

• 5d12h32m6s
• 12h32m6s
• 32m6s
• 1h
• 30m
• 30s
• etc...

With "d" for days, "h" for hours, "m" for minutes and "s" for seconds. To calculate time quickly, several values can be placed one after another.

Spaces and line breaks

Spaces and line breaks are ignored by the calculator.

So you can use as many spaces as you like to keep your calculations organized.

If the first duration on a line has no operator (or sign), it is treated as an addition by default.

Calculation result

The result appears in the dedicated field.

You can choose whether the result should be displayed with days or not.

Changing the result format

You can change the result format by clicking the "Days?" toggle.

Save the results

You can record the results in a table by pressing the Save button. To keep a record of your time data, feel free to export the table in CSV or PDF format.

Use cases

This tool is useful for adding up several work-time durations to find the total, or for summing a large number of lap times for a swimmer, a runner…