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What are decimal hours?

Invoicing, time cards and scheduling glossary

Hours written as a decimal number for payroll (7.75) instead of hours and minutes (7:45).

Divide the minutes by 60: 15 minutes = 0.25, 30 = 0.5, 45 = 0.75, 6 minutes = 0.1. Payroll multiplies decimal hours by the hourly rate; multiplying 7.45 (a misread 7:45) by the rate underpays by 18 minutes.

Totalling a week is safest in minutes, converting to decimal only at the end, so rounding errors do not pile up.

Example: 7:45 = 7 + 45/60 = 7.75 h; at $18/h that is $139.50, not $134.10.

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