Decimal Hours Calculator: Convert Hours and Minutes

Category: Date-Time Format Converters

- November 04, 2026

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Convert hours and minutes to decimal hours

Hours

Minutes

Convert decimal hours to hours and minutes

Decimal hours

Minutes are a fraction of 60: 30 minutes = 0.5 hour, not 0.30 hour.

How to convert hours and minutes to decimal hours

Decimal hours express a duration as one number. Divide the minutes by 60 and add that fraction to the whole hours. For example, 2 hours 45 minutes is 2 + 45/60 = 2.75 hours. A common mistake is writing 2:30 as 2.30 hours; thirty minutes is half an hour, so the correct decimal is 2.5.

Converting decimal hours back to hours and minutes

Multiply decimal hours by 60 to obtain total minutes. Divide the total by 60 for whole hours and use the remainder as minutes. The calculator rounds to the nearest minute because Most schedules and timesheets do not record fractions Of a minute.

Common decimal-hour values

15 minutes = 0.25 hour
30 minutes = 0.5 hour
45 minutes = 0.75 hour
1 hour 6 minutes = 1.1 hours
1 hour 30 minutes = 1.5 hours

Decimal hours are useful for timesheets, payroll estimates, project tracking and invoices. Confirm the rounding policy before submitting paid or billable time, because an employer or client may require a particular increment.