Decimal Hours vs Clock Time: Converting for Payroll and Invoicing
Learn how to convert minutes to decimal hours for accurate payroll, billing, and freelance timesheets.
1. The Base-60 to Base-10 Problem
30 minutes is 0.5 hours (not 0.3 hours). 15 minutes is 0.25 hours. 45 minutes is 0.75 hours. Miscalculating minutes as decimals leads to significant underpayment or billing errors.
2. The Core Conversion Formula
To convert any minute value to decimal, divide the minutes by 60: Decimal = Minutes / 60. For example, 18 minutes / 60 = 0.30 decimal hours.
Related Time & Date Tools
Convert hours, minutes, and seconds (HH:MM:SS) to decimal hours for timesheet billing and payroll.
Convert decimal hours (e.g. 7.75 hours) back into hours, minutes, and seconds (7h 45m 00s).
Free online weekly time card calculator. Enter clock in and clock out times for Monday through Sunday to compute weekly payroll hours.
Frequently Asked Questions
Why does payroll require decimal hours?▼
Accounting software multiplies hours by wage rates using standard base-10 arithmetic, whereas clock minutes operate in base-60 (sexagesimal).