TimeCubby.

Decimal Hours Converter

Turn hours and minutes into decimal hours, or convert decimals back into a readable duration.

Enter a duration

Use H:MM or H:MM:SS, such as 7:30. The first number is hours, even above 24.

Conversions stay in this browser and are not saved. Copy link shares only the single value and its format.

Your converted duration

Enter a value and choose Convert time.

Convert a list of durations

Paste one value per line, up to 200 values and 16,000 characters. Blank lines are ignored. Each row keeps its original line number, including any rows that need correction.

Use the selected format for every line. H:MM always means hours:minutes. Durations can be negative and can exceed 24 hours.

Your converted list will appear here.

Hours and minutes are not decimal hours

Divide the minutes by 60 and add them to the hours. 7 hours 30 minutes is 7 + 30 ÷ 60 = 7.5 hours. In the other direction, multiply the fractional hour by 60: 7.75 hours is 7 hours 45 minutes.

What does 7.30 mean?

In Decimal hours mode, 7.30 means 7 hours 18 minutes. In Hours:minutes:seconds mode, enter 7:30 for 7 hours 30 minutes. The input format controls the interpretation; the decimal point and colon are not interchangeable.

Can I convert a whole timesheet?

Paste one duration per line and select the format used by the whole list. The converter preserves long durations, so 27:30 becomes 27.5 hours. Use the Time Card Calculator when you need to subtract breaks or total clock-in and clock-out intervals.

How is rounding handled?

Inputs are converted to the nearest millisecond. Decimal outputs show up to six places, with unnecessary trailing zeros removed. This is a format conversion: it does not apply an employer's rounding policy, overtime rules or pay rates.