Minutes to hours
Multiply minutes by 0.0166667 to get hours.
90 min = 1.5 h
How to convert minutes to hours
The hour is exactly 60 minutes (3600 seconds). The minute is exactly 60 seconds.
Worked example — 90 min: 90 × 0.0166667 = 1.5 h.
Minutes to hours table
| Minutes | Hours |
|---|---|
| 15 min | 0.25 h |
| 30 min | 0.5 h |
| 45 min | 0.75 h |
| 60 min | 1 h |
| 90 min | 1.5 h |
| 120 min | 2 h |
| 180 min | 3 h |
| 240 min | 4 h |
| 480 min | 8 h |
Reverse and related
About minutes and hours
Minute (min)
1 min = 0.0166667 hDefinition. Exactly 60 seconds
History and origin
The minute, exactly 60 seconds, comes from the Babylonian base-60 system passed down through astronomy, the same system that gives 60 minutes to the hour. Its name means a small part.
Current use
Minutes are an everyday unit for timing, scheduling and cooking.
Source: BIPM SI Brochure (2019); the second is defined by the caesium-133 transition
Hour (h)
1 h = 60 minDefinition. Exactly 60 minutes (3600 seconds)
History and origin
The hour divides the day into 24 parts, a scheme inherited from ancient Egypt, and equals exactly 60 minutes or 3600 seconds. Fixed-length hours replaced older seasonal hours as mechanical clocks spread.
Current use
Hours structure the working day, schedules and pay, and are read off every clock.
Source: BIPM SI Brochure (2019); the second is defined by the caesium-133 transition
Where people use this
Minutes: everyday timing, cooking. Hours: schedules, work and pay. 90 minutes is 1.5 hours.
Every value is carried to full double precision; the display is rounded.
Both units are defined in BIPM SI Brochure (2019); the second is defined by the caesium-133 transition.
Questions people ask
How many hours is 90 minutes?
90 minutes is 1.5 hours.
How many minutes in an hour?
One hour is exactly 60 minutes.
How many hours is 120 minutes?
120 minutes is 2 hours.