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Time Calculator

Add, subtract, and calculate time differences

Last Updated: July 2026
Enter first time
Enter second time
What to calculate
Hours
—
Complete hours
Minutes
—
Remaining minutes
Total Minutes
—
In minutes

Time Calculation Breakdown

ComponentValue

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What Is a Time Calculator?

A Time Calculator performs arithmetic operations on time values. You can calculate the difference between two times, add time durations, or subtract time. It shows results in hours, minutes, and total minutes.

This calculator is useful for calculating work hours, meeting durations, travel time, project timelines, and any scenario involving time calculations.

Time Calculation Formula

Difference = Time2 - Time1 (in minutes)
Addition = Time1 + Time2
Subtraction = Time1 - Time2
Difference = Time between two timesAddition = Sum of durationsSubtraction = Time1 minus Time2

Frequently Asked Questions

How to calculate time difference?
Convert both times to minutes from midnight, then subtract. For example, 9:00 AM to 5:30 PM: (17×60+30) - (9×60+0) = 1050 - 540 = 510 minutes = 8 hours 30 minutes.
How to add time durations?
Add hours and minutes separately. If minutes exceed 60, convert to hours. For example, 2:45 + 3:30 = 5:75 = 6:15 (6 hours 15 minutes). This calculator handles time addition automatically.
How to calculate work hours?
Subtract start time from end time. For example, 9:00 AM to 6:00 PM with 1 hour lunch break: (18:00 - 9:00) - 1:00 = 8 hours. Use 24-hour format for accuracy.
What is 24-hour time format?
24-hour format runs from 00:00 (midnight) to 23:59. 1:00 PM = 13:00, 5:30 PM = 17:30. This format avoids AM/PM confusion and is used in military, aviation, and many countries.
How to convert time to decimal hours?
Divide minutes by 60. For example, 8 hours 30 minutes = 8 + 30/60 = 8.5 hours. This is useful for payroll calculations and time tracking.

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