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Time Duration Calculator

Calculate same-day time differences or add multiple hours-and-minutes durations.

Select Calculation

Use this for same-day time spans such as a shift, meeting, or focused work block.

Result

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Select Calculation

Use this for same-day time spans such as a shift, meeting, or focused work block.
Time Duration Calculator

Quick Start

1
Choose between calculating a span between two times or adding duration rows.
2
For a time span, enter start and end times. For totals, enter hours and minutes by row.
3
The result shows both hours-and-minutes and total minutes for schedules, invoices, or notes.

Common Scenarios

Work shifts

calculate the same-day span from start to finish.

Meetings and classes

check how long a scheduled block lasts.

Multiple entries

add separate duration rows into one total.

Usage Advice

Between-times mode only calculates same-day spans and does not wrap across midnight.
Minutes should be 0 to 59; enter 90 minutes as 1 hour 30 minutes.
Add-duration mode supports up to 20 rows for quick totals, not a full timesheet.

Limitations & Compatibility

Overnight spans, timezones, daylight saving, and breaks need separate handling or a dedicated timesheet tool.
Payroll, invoicing, or billing may require custom rounding such as 6-minute or 15-minute increments.
Browser time controls may display differently by locale, but the calculation uses HH:mm.

Privacy & Security

Times and duration rows are calculated locally in your browser and are not uploaded.

FAQ

6

Continue with these related tools for the next step.