Time to Decimal Calculator
Decimal hours = hours + minutes / 60.
Enter hours and minutes
Enter hours and minutes, then convert the value into decimal hours. The calculator divides minutes by 60 and adds the result to the hour value.
Use this for payroll, invoicing, timesheets and spreadsheet math. It is also useful when a system asks for 7.75 instead of 7 hours 45 minutes.
If your source value is written like 7:45, treat it as hours and minutes first. Do not paste it as 7.45.
Decimal hours explained
Decimal hours are hours written in base 10. The part after the decimal is a fraction of an hour, not minutes.
That means 1.5 hours is 1 hour 30 minutes. It does not mean 1 hour 50 minutes. This is the key idea behind most decimal time mistakes.
Once the value is decimal, it can be multiplied by a rate or added to other decimal hour values cleanly.
Minutes divided by 60
The formula is decimal hours = hours + minutes / 60. For 8 hours 45 minutes, divide 45 by 60 to get 0.75. Add that to 8 for 8.75 hours.
To convert decimal hours back, keep the whole number as hours. Multiply the decimal part by 60 to get minutes.
This two way check is useful. If 8.75 converts back to 8 hours 45 minutes, the decimal value is consistent.
Converting 7 h 30 min
For 6 hours 20 minutes, calculate 20 / 60 = 0.3333. Add that to 6. The decimal result is about 6.33 hours when rounded to two decimals.
For 2 hours 5 minutes, calculate 5 / 60 = 0.0833. The result is about 2.08 hours, not 2.5 hours.
Small minute values are where mistakes stand out. Five minutes is only one twelfth of an hour, so the decimal is small.
Payroll rounding is separate
The most common mistake is writing minutes directly after the decimal point. 7 hours 30 minutes becomes 7.5, not 7.30.
Another mistake is rounding too early. Keep enough decimal places while calculating pay or totals, then round the final result according to the rule you need.
Also check whether your spreadsheet stores time as a day fraction. Some spreadsheet cells need to be multiplied by 24 before they become decimal hours.
Time to Decimal Calculator FAQ
How do I convert minutes to decimal hours?
Divide the minutes by 60. Thirty minutes divided by 60 is 0.5. Fifteen minutes divided by 60 is 0.25.
Then add the result to the whole hours. That gives the decimal hour value.
For example, 9 hours 40 minutes is 9 + 40 / 60. That gives about 9.67 hours.
Why is 1 hour 30 minutes equal to 1.5 hours?
Because 30 minutes is half of an hour. Half of an hour is 0.5 in decimal form.
So 1 hour plus 0.5 hours equals 1.5 hours. The decimal part is not a minute label.
This is the easiest anchor value to remember. If 30 minutes is .5, then 15 minutes is .25 and 45 minutes is .75.
What is 15 minutes in decimal hours?
15 minutes is 0.25 hours because 15 divided by 60 equals 0.25.
This is why 8 hours 15 minutes becomes 8.25 decimal hours.
Think of it as a quarter hour. Four blocks of 15 minutes make one full hour.
How many decimal places should I use for payroll?
Use the rule your payroll system requires. Many systems accept two decimal places, but some keep more precision or round to set time blocks.
If you are unsure, keep the exact minutes in your records and use decimal hours only for the final entry.
How do I convert decimal hours back to hours and minutes?
Keep the whole number as hours. Multiply the decimal part by 60 to get minutes. For 7.75 hours, the whole number is 7 and 0.75 x 60 is 45.
The result is 7 hours 45 minutes.
If the minutes have decimals after multiplying, round only according to the precision your timesheet or invoice requires.