Hrs Minutes Calculator
Hrs to minutes calculator works out Duration in hours and Duration in minutes from Durations, Start time and Start date (optional). The default figures on this page give duration in hours of 4.2500 h; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
2 steps
- Total of 2 duration(s): 1:30:00 + 2:45:00 = 4:15:00.
- 255 minutes total = 4.25 hours (60 s = 1 min, 60 min = 1 h).
Each durationtable
| index | clock | minutes | hours |
|---|---|---|---|
| 1 | 1:30:00 | 90 | 1.5 |
| 2 | 2:45:00 | 165 | 2.75 |
Its 10 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
3 sources
What the hrs to minutes calculator calculates
Elapsed time between two clock times, including overnight and multi-day spans, adding or subtracting hours, minutes and seconds from a time, totalling a list of durations such as a playlist or a set of videos, halving or splitting a duration, and rescaling a runtime for playback speed.
How to use this hrs to minutes calculator
Enter Durations, Start time, Start date (optional) and End date (optional). Duration in hours updates as you type. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Duration in hours, Duration in minutes and Duration in seconds.
The method follows ISO 8601-1:2019, Date and time - Representations for information interchange, clauses 5.3 and 5.5, BIPM SI Brochure, 9th edition, Table 8 (non-SI units accepted for use with the SI) and US Department of Labor, Fact Sheet #22: Hours Worked Under the FLSA.
What you can compare
Change one input at a time to see how it affects Duration in hours, Duration in minutes and Duration in seconds. The inputs you can vary are Durations, Start time, Start date (optional) and End date (optional).
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How do you manually convert hours to minutes?
Elapsed time between two clock times, including overnight and multi-day spans, adding or subtracting hours, minutes and seconds from a time, totalling a list of durations such as a playlist or a set of videos. Open “How this is worked out” beside the result to see each step for your own figures.
What is 8hr in minutes?
Elapsed time between two clock times, including overnight and multi-day spans, adding or subtracting hours, minutes and seconds from a time, totalling a list of durations such as a playlist or a set of videos. On this page it is computed from Durations, Start time and Start date (optional) and shown as Duration in hours, Duration in minutes and Duration in seconds.
How do I convert hours to minutes?
It needs Durations, Start time, Start date (optional) and End date (optional). Nothing else is required, and the figures stay in your browser.
What information do I need for the hrs to minutes calculator?
You need Durations, Start time, Start date (optional) and End date (optional). The page opens with default figures that give duration in hours of 4.2500 h, so you can see the scale before entering your own.
What does this hrs to minutes calculator show?
It shows Duration in hours, Duration in minutes, Duration in seconds, Whole days, Hours part, Minutes part, Seconds part and Duration as h:mm, with the working and any warnings for your entries.
Can I check how the hrs to minutes calculator result was calculated?
Yes. The “How this is worked out” section shows the calculation steps, and the sources section identifies the references used for the method.