Decimal Hours Converter

Hours and Minutes to Decimal Hours

Decimal hours = sign × (whole hours + minutes ÷ 60). In the starting example, 7 hours 30 minutes is 7.50 hours at two decimal places because 30 minutes is half an hour. The entry 7.30 decimal hours means 7 hours 18 minutes.

Enter hours and minutes as H:MM. A minus sign applies to the whole duration, so -0:30 converts to -0.50 hours at two decimal places. The hours are elapsed time and can exceed 24. For example, 25:15 is 25.25 hours. The limit is 100,000 hours in either notation, with or without a minus sign.

Decimal Hours Back to a Duration

Multiply the absolute decimal hours by 60 to get total minutes. Round that total to a whole minute, divide by 60 for the whole hours and keep the remainder as minutes. Then restore any minus sign.

For example, 1.75 hours is 105 minutes, or 1 hour 45 minutes. An adjustment of -1.75 hours deducts the full 1 hour 45 minutes. At the nearest whole minute, 1.999 hours gives 2 hours 0 minutes because 119.94 minutes rounds to 120.

Rounding and Payroll Worksheet Checks

The result shows the exact conversion and the display rounding. At a halfway point, nearest rounding increases the magnitude. When converting to whole minutes, Down shortens the duration and Up lengthens it before any minus sign is restored.

Twenty minutes is exactly 20 ÷ 60 hours. It displays as 0.3 hours at one decimal place and 0.333 hours at three. Converting 0.3 hours back gives 18 minutes, so keep the original duration if you need to check the worksheet later.

For hours and minutes, use one optional sign and a two-digit minute component from 00 to 59. Zero is valid. A result that rounds to zero displays without a minus sign.

Choose the decimal places your worksheet accepts. The converter changes the display of one duration. Apply your employer’s time-rounding policy separately when recording paid hours.