Hours to minutes and time unit converter

To turn hours into minutes, multiply by 60: 2.5 hours × 60 = 150 minutes. To turn minutes into hours, divide by 60: 200 minutes ÷ 60 = 3.33 hours.

Payroll systems and many time-tracking apps record hours as decimals, while clocks show hours and minutes. The box under the converter does both directions:

• Decimal to h:mm: multiply the decimal part by 60. 7.75 h → 0.75 × 60 = 45 min → 7:45.
• h:mm to decimal: divide the minutes by 60. 8:20 → 20 ÷ 60 = 0.333 → 8.33 h.

A common mistake is to read 7.30 as seven hours thirty minutes. In decimal hours, 7.30 is 7 hours 18 minutes, and 7:30 is 7.5 hours.

Calendar months have 28 to 31 days and years have 365 or 366, so a converter has to use averages. This tool uses the Gregorian calendar averages: a year of 365.2425 days and a month of one twelfth of that, 30.436875 days. That's right for long-run comparisons, such as how many hours are in an average year, but not for a specific date range. To count the days between two actual dates, use a date calculator instead.

• A 40-hour work week is 2,400 minutes or 144,000 seconds.
• A 90-minute movie is 1.5 hours.
• One million seconds is about 11.6 days; one billion seconds is about 31.7 years.
• Billing in tenths: law firms and consultants often bill in 6-minute increments, so 0.1 h = 6 min and 0.3 h = 18 min.
• Video and audio: a 3,600-second recording is exactly one hour.

Pick 0 to 8 decimal places, and use the copy button to paste the result into a spreadsheet.

Overtime is a common case: if you worked 8:50, 9:10 and 7:45 on three days, convert each to decimal hours (8.83, 9.17 and 7.75) and add them for a total of 25.75 hours, or 25:45.

Software timers, APIs and performance tools often report time in milliseconds. 1 second is 1,000 ms, 1 minute is 60,000 ms, and 1 hour is 3,600,000 ms. Enter a millisecond value and convert it to seconds or minutes to make it readable. All calculations run in your browser, so nothing you type is sent to a server.