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Hazuu Tools

Time Calculator

Calculate, add, and subtract time values easily.

timerTime Calculator
date_range

Time Between Two Dates

Start Date & Time
End Date & Time
Difference

0s

Total: 0.00 hours

add

Add Times

Time 1
Days
Hours
Min
Sec
add
Time 2
Days
Hours
Min
Sec
Sum

0s

remove

Subtract Times

From
Days
Hours
Min
Sec
remove
Subtract
Days
Hours
Min
Sec
Difference

0s

edit_calendar

Modify Date

Starting Date & Time
Add / Subtract Time
Days
Hours
Min
Sec
New Date

Saturday, Feb 21, 2026 at 9:46 AM
info

About Time Calculator

The Time Calculator is a versatile online tool that helps you perform a variety of time-related calculations. Whether you need to find the duration between two dates, add or subtract time values, or modify a date by a specific interval, this calculator handles it all in one place.

All four calculation modes work in real time as you enter values, with results displayed instantly. Every calculation runs entirely in your browser, keeping your data private and ensuring a fast, reliable experience with no server calls.

help

How to Use

01

Choose a Mode

Select from four calculation types: time between dates, add times, subtract times, or modify a date.

02

Enter Values

Fill in the required dates, times, or duration fields for your chosen calculation.

03

View Results

Results are calculated and displayed instantly as you type. No need to click a button.

quiz

Frequently Asked Questions

What is a Time Calculator? expand_more
A Time Calculator is an online tool that performs various time-related operations including finding the difference between two dates, adding or subtracting durations, and modifying dates by specified time intervals.
How do I calculate time between two dates? expand_more
Enter a start date and time, then enter an end date and time. The calculator will instantly show the difference in days, hours, and minutes, plus the total number of hours.
Can I add days, hours, minutes, and seconds together? expand_more
Yes. Use the Add Times section to enter two time durations with days, hours, minutes, and seconds. The calculator sums them and shows the total in a normalized format.
Is this tool free and private? expand_more
Yes. The Time Calculator is completely free to use and all calculations happen locally in your browser. No data is sent to any server.