Time Math Calculator

This converter requires the use of Javascript enabled and capable browsers.

In the fields below, enter any combination of days, hours, minutes and seconds. Then click on either the Add or the Subtract actuators in order to process your request. You may then process another request that will either add to or subtract from, depending on your actuator choice, the already accumulated total. You may clear all fields and the totals by clicking on the Clear Values actuator. Only positive whole integer numbers are valid; all fractions entered will be disregarded. If you wish to subtract, use the Subtract actuator after entering a positive number. See more details below the calculator. We also have an add only time calculator for your use, similar in intent, but slightly different in operation and entry, if required to use it for some reason.


Enter Any Combination of Days ~ Hours : Minutes : Seconds
Days	Hours	Minutes	Seconds
Total Displayed in Days ~ Hours : Minutes : Seconds
Time Add To Total Time Subtract From Total Reset D ~ H : M : S Values & Total Time

Ver. 9.3.1 The factors for the above calculations are based on 60 seconds per minute, 60 minutes per hour and 24 hours per day. You may enter numbers larger than 2 digits in a designated entry field; for instance 100 minutes will accumulate as 1 hour and 40 minutes. Fractions are ignored but the integer part of the number is considered valid. for instance 1.5 hours will accumulate as 1 hour. If you are looking to convert time instead of calculate it, or see the different time zones, try one of our other converters listed below. You may also wish to try one or more of the other similar in result This calculators in the time menu.

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