Education
Time to Decimal Calculator
Last updated: June 19, 2026
A time to decimal calculator is a utility used in payroll and scheduling to convert time durations between base-60 hours/minutes (HH:MM) and base-10 decimal hours. It facilitates wage calculation by dividing minutes by 60 to obtain decimal parts, or multiplies decimal parts by 60 to convert them back to standard clock minutes.
Easily convert hours and minutes to decimal hours (and vice versa) for timesheet auditing, wage calculations, and time tracking.
Quick Answer
Convert hours and minutes to decimal hours and back. Easily audit timesheets and payroll by converting minutes to base-10 decimals.
Value must be between 0 and 59.
Decimal hours
7.50 hrs
7h 30m converted to base-10
Examples
7 hours and 30 minutes (HH:MM to Decimal)
7.50 decimal hours
8.25 decimal hours (Decimal to HH:MM)
8 hours and 15 minutes
5 hours and 40 minutes (HH:MM to Decimal)
5.67 decimal hours
How it works
Converting between the base-60 time system and base-10 decimal system involves simple multiplication or division by 60:
Convert Time to Decimal:
Decimal Hours = Hours + (Minutes ÷ 60)
Convert Decimal to Time:
Hours = Floor(Decimal Hours)
Minutes = Round((Decimal Hours − Hours) × 60)
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Frequently asked questions
Because payroll systems and general math calculators run on the base-10 decimal system, while time runs on a base-60 (sexagesimal) system. To multiply work hours by an hourly wage, you must convert the minutes to decimal hours first (e.g., 8 hours 30 minutes becomes 8.5 hours).
Divide the number of minutes by 60. For example, 15 minutes is 15 ÷ 60 = 0.25 decimal hours. 45 minutes is 45 ÷ 60 = 0.75 decimal hours.
Multiply the decimal part (the numbers after the decimal point) by 60. For example, in 7.4 hours, you multiply 0.4 by 60 to get 24 minutes, resulting in 7 hours and 24 minutes.
Yes. Common conversions include: 15 minutes = 0.25, 30 minutes = 0.50, 45 minutes = 0.75. Other values can end in repeating decimals (like 20 minutes = 0.333...) which are rounded to two or three decimal places for payroll.
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