Time Duration Calculator
Duration between times.
Private — runs in your browser Instant results
Duration
8h 30m
510 minutes total
Introduction
Calculate the duration between two times on the same day. Use The Daily Tools' Time Duration Calculator for private, browser-based processing — no account or server upload required.
What is Time Duration Calculator?
Use this calculator to find the elapsed time between a start and end time. When the end time is earlier than the start time, it treats the end as occurring on the following day, which is useful for overnight shifts.
Definition: Time Duration Calculator finds the elapsed hours and minutes between two times of day.
Calculation steps
- Configure the inputs shown in the Time Duration Calculator form above.
- The tool applies the method described by its inputs and result labels.
- Review the result and the assumptions used to produce it.
- Use the related tools below when you need a different times task.
Worked example
Example: a 9:00 AM to 5:30 PM workday
Inputs: Start = 09:00, End = 17:30
- Convert each time to minutes after midnight: 09:00 = 540 and 17:30 = 1,050.
- Subtract the start from the end: 1,050 − 540 = 510 minutes.
- Convert 510 minutes to hours and minutes: 8 hours 30 minutes.
The duration is 8 hours 30 minutes (510 minutes).
Use cases
- Checking shift length before unpaid breaks
- Calculating elapsed time for travel, events, or study sessions
- Working out an overnight duration that crosses midnight
Advantages
- Browser-based processing — entered values and selected files are not sent to our servers
- No account required
- Instant results with a clean, readable interface
Limitations
- The calculator does not subtract breaks automatically.
- It calculates a duration between two times, not a time-zone conversion.
- For dates spanning more than one day, use the Date Difference Calculator.
Frequently asked questions
- Does this calculator work across midnight?
- Yes. If the end time is earlier than the start time, it is counted as the next day.
- How do I subtract a lunch break?
- Calculate the full duration, then subtract the break length from the total minutes.
- Can I use it for multiple days?
- Use Date Difference Calculator for calendar dates, then add any partial-day time separately.
- Is the Time Duration Calculator free to use?
- Yes. Time Duration Calculator on The Daily Tools is completely free, requires no account, and runs entirely in your browser.
- Does The Daily Tools store my inputs?
- No. Your numbers and text never leave your device. The Daily Tools has no backend database for calculator inputs.
- Who should use the Time Duration Calculator?
- Anyone who needs a clear date and time calculation and wants to check the assumptions used.
- How accurate is the Time Duration Calculator?
- Results are computed locally using established methods for times. Treat outputs as estimates, not professional advice.
- Can I use the Time Duration Calculator on mobile?
- Yes. The Daily Tools is fully responsive and works on phones, tablets, and desktops.
Sources & references
Key points
- Time Duration Calculator is a free, browser-based calculator for duration between times.
- Duration between times.
- Private, browser-only processing
- Private, browser-based processing