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Decimal Hours Converter: Hours and Minutes to Decimal

This free decimal hours converter changes hours and minutes into decimal hours and back. It is made for payroll and invoices, where 7 hours 45 minutes must be typed as 7.75.

By Debmedia Technologies LLP · Kolkata, India · Updated

What Is It and When Do You Need It?

Decimal hours write time as a single number, so 1 hour 30 minutes becomes 1.5. Timesheets, payroll software and invoices all use it, while clocks show hours and minutes. Mixing the two causes pay mistakes, since 7.30 on a timesheet is not 7 hours 30 minutes.

Type a value in either form and the tool converts it.

How to Use This Tool

  1. Type a value, such as 7:45 or 7.75.
  2. Leave the mode on automatic, or choose a direction.
  3. Press Convert.
  4. Use the chart for common minutes.

How the Calculation Works

Hours and minutes to decimal: hours + minutes ÷ 60. Decimal to hours and minutes: the whole part is hours and the decimal part times 60 is the minutes, rounded to the nearest second.

Worked Example

7:45 is 7.75 hours. 7.75 hours is 7 hours 45 minutes. 3.2 hours is 3 hours 12 minutes. 0:20 is 0.3333 hours.

Common Uses

  • Payroll and invoices.
  • Timesheets in decimal format.
  • Billing clients by the hour.
  • Spreadsheet formulas.

Tips and Common Mistakes

  • 0:10 is 0.17, not 0.10.
  • Use at least two decimals to avoid drift.
  • Use the time card calculator for many shifts.
  • A timesheet that says 7.30 usually means 7.3 hours, which is 7 hours 18 minutes, so ask which format your payroll uses before you fill it in.

Next, you may need the time card calculator, time duration calculator, military time converter, business days calculator.

Everything runs in your browser. Nothing you type is uploaded, stored or sent to any outside service.

Frequently Asked Questions

Divide the minutes by 60. 15 minutes is 0.25, 30 minutes is 0.5 and 45 minutes is 0.75.
Multiply the part after the decimal point by 60. 0.2 hours is 12 minutes.
Because pay is hours times a rate, and multiplying is easier with a single decimal number than with hours and minutes.
Keep two decimals for most payroll. Your employer or law may set a rounding rule, such as the nearest 6 or 15 minutes.

Disclaimer: results are calculated in your browser from the numbers you enter. Check important results before you rely on them for money, health, safety or legal decisions.