Time Add / Subtract Calculator

 Hours  Minutes
 Hours  Minutes
Result :

Days Between Dates:

Date calculator provides you the number of days between two dates. Our date duration calculator helps you find the exact difference between two dates in days, weeks, and months.

What is Date calculator?

Date duration calculator measures the exact time between two dates. To determine the number of days between two dates you need to enter the starting & ending date in month/day/year format. Click on calculate to get exact time difference between two dates in days, weeks, and months.

How to use date duration calculator?

To use the date duration calculator you need to follow below steps.


Open Date Calculator.


Enter the Start and End dates in month/date/year format.


Click on calculate to get time difference between dates in days, weeks, and months.

Convert Time
Time conversions:
1. 60 seconds = 1 minute
2. 60 minutes = 1 hour
3. 24 hours = 1 day
4. 7 days = 1 week
5. 12 months = 1 year
6. 52 weeks = 1 year
7. 365 days = 1 year (366 for leap years)
8. 10 years = 1 decade
9. 100 years = 1 century
10. 1000 years = 1 millennium

Add and Subtract Time Calculator

Adding and subtracting time is crucial for efficient scheduling, planning, and time management in daily activities and projects.

How the Time Calculator Works

This tool allows for easy input of hours and minutes to add or subtract time, providing accurate and instant results for any time management need.

Time Calculation Formula

For addition:

\[ \text{Total Time} = \text{Initial Time} + \text{Added Time} \]

For subtraction:

\[ \text{Remaining Time} = \text{Initial Time} - \text{Subtracted Time} \]

The calculator ensures accuracy by converting minutes to hours when necessary.

Practical Applications

From event scheduling to daily planning and educational purposes, this calculator is a versatile tool for managing time effectively.

Frequently Asked Questions

How do you add and subtract time?
Enter the starting time and the time to add or subtract. The calculator will display the result, including any necessary conversions.

What is 30 minutes after 9:45?
Adding 30 minutes to 9:45 gives you 10:15.

How do you subtract the time difference?
Input your initial time and the time to subtract. The calculator will provide the earlier time, factoring in any conversions needed.

Is 75 minutes an hour and 15 minutes?
Yes, 75 minutes is equal to 1 hour and 15 minutes. The calculator can assist in converting such time units.

How do I calculate time?
Use the calculator by entering hours and minutes for addition or subtraction. It simplifies complex time calculations efficiently.

How long is 90 minutes?
90 minutes is equivalent to 1 hour and 30 minutes. The calculator can break down such durations into hours and minutes.

What is 15 mins before 9?
15 minutes before 9:00 is 8:45. The calculator can subtract minutes from any given hour to find such times.

How to calculate speed?
Speed is calculated as distance divided by time. While this calculator focuses on time, you can use the duration it provides to calculate speed given a distance.

How do you write 8 hours 30 minutes?
8 hours and 30 minutes can be input directly into the calculator to add or subtract from another time value.