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  
: :   : :
: :   : :
: :   : :  

Date Calculator | Hours Calculator | Birthday Calculator | Age Calculator | Days Calculator

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)

Sometimes time becomes a villain if you misuse/waste it. If you don’t want to waste your time then use this time calculator. It will increase your productivity and also you can save it. Then you can utilize it for something else.

Measurement of Time

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

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 up then you have a quarter, leap year, decade, century, and millennium. The basic or standard units are minutes and seconds.

History of Time

Today we have a clock and watches to watch the time. It’s very interesting to know how ancient people watched time without any modern facilities. Egyptian Civilisation first launched the concept of measuring time and units like hours, minutes, and seconds. They only developed 24 hours day concept.

They used nature as a clock. The day was divided into 12 parts. Ranging between sunrise and sundial. After that, they modify it and introduced new methods to measure time. Then people started using an hourglass. That includes two parts. One portion was filled with sand and another one is empty. For measure time, we have to keep a filled portion upside. While the empty potion remained downside. So, time progress was measured using the rate of sand falling 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 do the time calculation using a Time calculator.

Features of Time Calculator

It has the best features which make it the best 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. In the same vein, 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. It will fetch the current time automatically.

How to Use Time Calculator?


  • An active Internet connection. Because it is an online tool.
  • A device that can access Internet like mobile phone, tablet, laptop, or PC.
  • Web browser like chrome, firefox, or, safari to open the tool.


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

Advantages of Using Time Calculator

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

In addition, if you do mathematical calculations on your own, then there is a chance to make mistake in the final result. Because humans can make a mistake. But it isn’t happening with the Calculator. Also, it always gives you 100% accurate output. Because it works on algorithms and our expert team has tested it so many times.