Time to Decimal Hours Converter
Convert time between hours-and-minutes and decimal hours.
Turning minutes into decimals
Timesheets, billing and payroll usually want time as decimal hours — 90 minutes as 1.5 hours — because decimals multiply cleanly against a rate, whereas hours and minutes do not. This converts between the two, so an hours-and-minutes figure becomes the decimal your spreadsheet or invoice needs, and back again.
Enter a time either way and see it converted.
The mistake people make by hand
The classic error is treating the minutes as if they were already decimal — writing an hour and thirty minutes as 1.30 hours, when it is actually 1.5, because thirty minutes is half an hour, not thirty hundredths. Minutes run to sixty, decimals to a hundred, so you have to divide the minutes by sixty to get the decimal fraction. That is exactly the arithmetic the converter handles, and getting it wrong on a timesheet quietly under- or over-counts every entry, which adds up over a month.
Common questions
Why is 1 hour 30 minutes 1.5 and not 1.30?
Because thirty minutes is half an hour. Minutes run to sixty, so you divide by sixty to get the decimal fraction, not treat them as hundredths.
Why convert time to decimal at all?
Decimal hours multiply cleanly against an hourly rate for billing, payroll and timesheets, where hours and minutes do not.
Is anything uploaded?
No. The conversion happens in your browser.