Time to Decimal Converter
Turn hours and minutes into decimal hours for payroll and timesheets — and convert decimal hours back to time. Edit either side and the other updates instantly.
8:30 = 8.50 decimal hours
Minutes to decimal chart
Round any minute to the nearest row for quick timesheet math.
Skip the timesheet math entirely
Chronoid records your work hours automatically on your Mac — every app, website, and document — and totals them in decimal hours, ready for payroll or an invoice. No stopwatch, no manual conversion, no rounding by hand.
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How to convert time to decimal
The rule is simple: minutes divided by 60. So 6 minutes is 0.1 hours, 15 minutes is 0.25, 30 minutes is 0.5, and 45 minutes is 0.75. Add that to your whole hours and you have decimal hours. The donut in the middle fills up as the minutes approach a full hour, so you can see the fraction as well as read it.
Tap any row in the minutes-to-decimal chart to load it, or type your own time on the left and read the decimal on the right.
When you need decimal hours
Almost any time you turn hours into money. Payroll systems, billing spreadsheets, and invoices all multiply an hourly rate by decimal hours, not by HH:MM. If you track your own hours for clients, converting to decimal is the last step before you send a bill — or you can let Chronoid total them in decimal for you.
Frequently Asked Questions
- How do you convert time to decimal hours?
- Divide the minutes by 60 and add them to the hours. For example 8 hours 30 minutes is 30 ÷ 60 = 0.5, so 8:30 becomes 8.50 decimal hours. 8 hours 15 minutes is 15 ÷ 60 = 0.25, or 8.25 hours. Type any time above and the converter does it instantly.
- What is 45 minutes as a decimal?
- 45 minutes is 0.75 hours, because 45 ÷ 60 = 0.75. Other common ones: 15 minutes is 0.25, 20 minutes is 0.33, 30 minutes is 0.50, and 40 minutes is 0.67. The chart below lists every 5-minute step.
- Why do timesheets and payroll use decimal hours?
- Payroll multiplies hours by an hourly rate, and that math only works cleanly in decimals. You cannot multiply 8:30 by $25 an hour directly, but you can multiply 8.50 by $25 to get $212.50. Converting your logged time to decimal hours is the step between a timesheet and a paycheck or an invoice.
- How do I convert decimal hours back to time?
- Take the part after the decimal point and multiply by 60 to get minutes. For 8.75 hours, 0.75 × 60 = 45 minutes, so it is 8:45. Type a decimal value in the right-hand box and this tool shows the HH:MM time for you.
- Is there a way to skip this conversion entirely?
- Yes. Chronoid records your work hours automatically on your Mac — every app, website, and document — and its reports already total your time in decimal hours, ready to drop into payroll or an invoice. No manual conversion, no rounding by hand. It is a $49 one-time purchase with a 7-day free trial.