Hours to Decimal Converter
Free hours to decimal converter: turn hours and minutes into decimal hours for payroll and billing, and convert decimal hours back to hours and minutes.
Hours and minutes to decimal
Enter hours and minutes to get decimal hours.
Decimal to hours and minutes
Enter decimal hours to get hours and minutes.
Decimal hours = hours + minutes / 60. For example, 8 hours 20 minutes is 8 + 20/60 = 8.33 hours. Payroll and billing usually need the decimal form.
Why decimal hours matter
Payroll systems and invoices work in decimal hours, not hours and minutes, so 1 hour 30 minutes has to become 1.5 before it multiplies cleanly by an hourly rate. Converting by hand is where rounding errors and lost minutes creep in.
Sandtime.io can show every duration in decimal hours: set the duration format once and reports, exports, and totals all follow it, so pay and invoices rest on a real record instead of hand conversions.
Decimal hours questions
How do I convert hours and minutes to decimal?
Divide the minutes by 60 and add them to the hours. 1 hour 30 minutes is 1 + 30/60, so 1.5 decimal hours; 7 hours 45 minutes is 7.75.
What is 15, 30, or 45 minutes in decimal hours?
15 minutes is 0.25, 30 minutes is 0.5, and 45 minutes is 0.75. Every 6 minutes is another 0.1, which makes 6, 12, and 18 minutes land on 0.1, 0.2, and 0.3.
How do I turn decimal hours back into minutes?
Multiply the decimal part by 60. In 3.4 hours, 0.4 times 60 gives 24, so it is 3 hours 24 minutes. Minutes never exceed 59, which is why 3.60 is not a valid reading of 3 hours 60 minutes.
Why does payroll use decimal hours?
Because an hourly rate multiplies cleanly against a decimal number and not against a mixed hours-and-minutes value. 7:45 times a rate is meaningless arithmetic; 7.75 times the rate is the amount to pay or invoice.
Skip the manual conversions
Sandtime.io records hours as you work and reports them in decimal for payroll and billing. Free for unlimited users, without surveillance.