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Hours calculator

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Calculate duration between two HH:MM timestamps quickly.

Updated

Hours calculator

Calculate duration between two HH:MM timestamps quickly.

Input format: Line 1=start HH:MM, Line 2=end HH:MM

Output

Quick start

How to use hours-calculator

Enter input and view computed output.

  1. Step 1
    Enter input

    Paste or type your data in the input box.

  2. Step 2
    Compute

    The tool processes input instantly in your browser.

  3. Step 3
    Use output

    Copy output and continue your workflow.

In-depth guide

Hours calculator guide

Calculate duration between two HH:MM timestamps quickly. This tool is designed for fast local processing and practical day-to-day use.

Quick start

Paste input, review output instantly, then copy it for your workflow.

Input tips

Use one value per line for structured inputs. Common separators are handled gracefully.

Privacy

Processing runs in your browser tab for the MVP workflow, with no mandatory upload step.

When to use it vs alternatives

Use this calculator for quick everyday estimates, date math, percentages, bill splitting, or simple planning. Use an official source or domain-specific calculator when legal, billing, payroll, or compliance accuracy is required.

Common pitfalls

  • Confirm dates, time zones, percentages, rounding, and currency assumptions before sharing a result.
  • Small input changes can produce noticeably different totals in date ranges, bills, and percentages.
  • Keep the original numbers nearby until the final result is verified.

Frequently asked questions

How does it handle overnight shifts?

If the end time is earlier than the start time, the tool assumes the shift crosses midnight and adds 24 hours so the duration stays positive.

Can I subtract a break?

Yes. Enter the unpaid break minutes and they are deducted from the total worked time.

Does it output decimal hours for payroll?

Yes. It shows both hours-and-minutes and decimal hours, since payroll systems usually expect decimals like 7.5.

Why convert 30 minutes to 0.5 and not 0.30?

Decimal hours are fractions of 60 minutes, so 30 minutes is half an hour, 0.5, not 0.30.

Can I add multiple time ranges?

Calculate each range and sum the decimal results, which avoids manual minute-carrying errors.

Is any data uploaded?

No. All calculations run locally in your browser.

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