Which tool should I use?
The quickest way to the right one.
| If you want to… | Use |
|---|---|
| Convert several units at once | Time Unit Converter |
| Turn “90 minutes” into hours | Minutes to Hours |
| Turn a duration into seconds for code | Minutes to Seconds / Hours to Seconds |
| Turn an estimate in hours into days | Hours to Days |
The numbers behind the conversions
Every conversion here rests on a handful of fixed relationships: 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, and 7 days in a week. Because those are exact, the results are exact — 90 minutes is precisely 1.5 hours, and 2 days is precisely 48 hours.
Results are shown in decimal form (1.5 hours, not 1 hour 30 minutes). If you need to move between decimal and hours-and-minutes for payroll, the time to decimal and decimal to time tools handle that step, and developers will find the timestamp tools useful for milliseconds and epoch values.
Frequently asked questions
How many minutes are in a day?
There are 1,440 minutes in a day (24 hours × 60 minutes), and 86,400 seconds.
How do I convert 90 minutes to hours?
Divide by 60: 90 ÷ 60 = 1.5 hours.
Do these converters use decimals?
Yes. Results are given as decimals — for example 1.5 hours — which is what spreadsheets and payroll systems expect.
Are they free?
Yes, every converter is free and runs entirely in your browser.
Explore other categories
Every tool here is built and reviewed by Fletcher Langley, with the method shown on each page and examples verified by hand — see our editorial policy.