Time to Decimal Calculator

Convert between time (HH:MM) and decimal hours instantly. Enter a time or decimal value and choose your conversion direction.

Enter Time (HH:MM)

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Result will appear here.

If you’ve ever worked with time sheets, payrolls, or billing, you’ve probably needed to convert standard time into decimal form. A Time to Decimal Calculator makes this simple by converting minutes and seconds into fractions of an hour.

For example, 1 hour and 30 minutes isn’t written as 1.30 in decimal format — it’s actually 1.5 hours, because 30 minutes is half of an hour. Similarly:

  • 15 minutes = 0.25 hours

  • 45 minutes = 0.75 hours

  • 10 minutes = 0.17 hours

⚙️ The Formula

To convert manually, divide the number of minutes by 60 (since there are 60 minutes in one hour).
Decimal Hours = Hours + (Minutes ÷ 60)

So if you worked 6 hours and 20 minutes, the math is:
6 + (20 ÷ 60) = 6.33 hours

This conversion is essential for accurate time-based calculations like employee pay, productivity tracking, and project billing. When time is stored as a decimal, it’s easier to calculate totals — for example, multiplying your hourly rate by the decimal hours gives instant earnings.

Thinking in decimal hours also simplifies time management and reporting. Instead of entering 7:45, you’d use 7.75 — which systems, spreadsheets, and calculators can handle without confusion. Whether you’re managing payroll, invoices, or personal time tracking, this small step saves you major errors.


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