Time Calculator – Add Or Subtract (Difference & Duration)

Time Calculator will help you to add or subtract two times with each other. Also, you can find the difference and duration of two times. So, just select the time limit and click on the “Calculate” button.

Years Months Days Hours Minutes Seconds 
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Time is the most important asset. In this universe, time is a thing that you can’t control. “Time and Tide wait for none!” It is a universal truth. We all accept this statement.

Time Calculator - Add Or Subtract (Difference & Duration)

Time being very important. It sometimes becomes a villain if you misuse/waste the time. If you don’t want to waste your time then use this time calculator. It will increase your productivity and you can also save time. And that you can later utilize for something.

Measurement of Time

There are many units we use for measuring time. Like second, minute, hours. Some very small units of time are picosecond, nanosecond, microsecond, and millisecond. These units are least observable by humans. Special slow-motion devices are used for it.

Similarly, there are some units that we are using to measure a very long time. Like an hour, day, week, month, and year. If you go more beyond then you have a quarter, leap year, decade, century, and millennium. The basic or standard unit of time is minutes and seconds.

History of Time

Today we have a clock and watches to watch the time. It will be very interesting to know how ancient people handled time without modern facilities. The concept of measuring time and coining of the terms like minutes, seconds, and hours was first done by Egyptian Civilisation. They only developed the 24 hours day concept.

They used nature as a clock. The day was divided into 12 parts. Ranging between sunrise and sundial. After that more modification was done. Humans developed and introduced new methods to measure time. Such as the use of hourglass. That consisted of two parts in which one portion was filled with sand. The filled portion was kept the upside. While the empty potion was kept downside. Time elapsed was measured using the rate of falling of sand from the upper part to the lower part.

Unit of Time

One minute contains 60 seconds. An hour has 60 minutes. Therefore, one hour ultimately has 60 x 60 seconds = 3600 seconds. For one day it will be 3600 x 24 = 86,400 seconds. As one day has a total of 24 hours. Similarly, you can find out your calculation by this basic conversion. Time calculator can do every type of time calculation.

Features of Time Calculator

It has the best features which make it the best online among all tools. Firstly, it has a very basic and simple user interface. In addition, you can add or subtract the duration of time. Just select the “+” sign if you want to add two times. Select the “-“ sign if you want to find the difference between two times.

You can enter the time in Years, Days, Hours, Minutes, and Seconds. Also, there is an option to fetch the current time. So, click the “Now” button at the side of the input boxes. The resulting time is also shown in Years, Days, Hours, Minutes, and Seconds.

How to Use Time Calculator?


  • An active Internet connection. Because it is an online tool.
  • A device which can access Internet. Preferably a mobile phone, tablet, laptop or PC.
  • Web browser to open the tool.


  1. First of all, open your web browser. Then go to the Time Calculator.
  2. When the website is completely loaded start filling your data. The format for entering data is YYYY, DD, HH, MM and SS. For current time simply click the “Now” button. It is not necessary to enter all the data prescribed in the format. Choose as per your requirements.
  3. After filling both fields, Select the operator (Add(+) or Subtract(-)).
  4. Press Calculate button to calculate the result.
  5. For new calculation click on “Reset” button. It is at the side of the Calculate button.

Advantages of Using Time Calculator

Manually determining the difference or duration between two given times is difficult. Also, it is very time taking. Therefore, in order to reduce your effort as well as to save time. It is better to use this tool.

If you do mathematical calculations on your own, then no one can guarantee your accuracy of the final result. You are prone to commit a mistake. So, this isn’t happening with the Calculator. Also, it is always 100% accurate. Because our expert team has tested it so many times.