Hours to Minutes Converter
Convert hours to minutes — sixty to the hour, including the awkward decimal ones. Results update as you type; exact factors shown.
One hour is 60 minutes — see the exact factor, not a rounded rule of thumb.
How the hours to minutes converter works
Time converts through the second. Minutes, hours, days and weeks are exact multiples. A month is taken as the Gregorian average (30.436875 days) and a year as the Gregorian average (365.2425 days = 31,556,952 s); calendar months and leap years vary from these averages.
The UK is metric for most trade and science but keeps miles, pints, stone and mpg (with the imperial gallon) in daily life.
Common time conversions
| From | To | Units |
|---|---|---|
| 0.25 h | 15 min | hours to minutes |
| 0.5 h | 30 min | hours to minutes |
| 0.75 h | 45 min | hours to minutes |
| 1 h | 60 min | hour to minutes |
| 1.5 h | 90 min | hours to minutes |
| 2 h | 120 min | hours to minutes |
| 2.5 h | 150 min | hours to minutes |
| 3 h | 180 min | hours to minutes |
| 4 h | 240 min | hours to minutes |
| 6 h | 360 min | hours to minutes |
| 8 h | 480 min | hours to minutes |
| 12 h | 720 min | hours to minutes |
Units in this converter and their exact factors
| Unit | Symbol | One unit in seconds |
|---|---|---|
| millisecond | ms | 0.001 second |
| second | s | 1 second |
| minute | min | 60 second |
| hour | h | 3,600 second |
| day | d | 86,400 second |
| week | wk | 604,800 second |
| month (average, 30.4369 days) | mo | 2,629,746 second |
| year (365.2425 days) | yr | 31,556,952 second |
FAQFrequently asked questions about time conversion
How many minutes in 1.5 hours?
90 minutes.
What is 7.75 hours in hours and minutes?
7 hours 45 minutes — the decimal 0.75 is three quarters of an hour.
Why do timesheets use decimal hours?
Because they multiply cleanly by an hourly rate; 7 h 45 min is awkward to multiply, 7.75 is not.
How many minutes in a working day?
Typically 456 for a 7.6-hour day, or 480 for eight hours.
What is 0.1 of an hour?
Six minutes — a common billing increment.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Physical Laboratory (NPL) — United Kingdom's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.