Hours to minutes conversion: formula and examples
Quick answer: Multiply hours by 60 to convert them to minutes. Divide minutes by 60 to convert back to hours. Example: 2.5 hours equals 150 minutes.
Convert hours to minutes
Multiply the number of hours by 60. For example, 3.25 hours × 60 = 195 minutes.
Convert minutes to hours
Divide the number of minutes by 60. For example, 90 minutes ÷ 60 = 1.5 hours.
Keep decimal hours and clock time separate
A decimal such as 1.5 hours means 1 hour 30 minutes. Do not read the digits after the decimal point as ordinary minutes.
Source & methodology
NIST explicitly states that one minute is 60 seconds and one hour is 60 minutes (3,600 seconds).