Quick answer
Multiply when going from larger units to smaller ones, and divide when going from smaller units to larger ones. The remainder gives the leftover minutes or seconds.
Step by step
- To convert hours to minutes, multiply by 60. To convert minutes to seconds, multiply by 60 again. An hour has 3,600 seconds.
- For a mixed duration, convert each part to the target unit and add. In seconds, use 3,600 × hours + 60 × minutes + seconds.
- For mixed units from total seconds, take as many whole hours as fit. Divide the leftover seconds into whole minutes and a final seconds remainder.
Worked examples
Minutes to mixed units
90 minutes = 1 hour 30 minutes. The exact decimal equivalent is 1.5 hours.
Seconds to mixed units
95 seconds = 1 minute 35 seconds.
Mixed units to seconds
1:02:30 = 3,600 + 120 + 30 = 3,750 seconds.
Quick reference
| Starting amount | Equivalent |
|---|---|
| 1 minute | 60 seconds |
| 1 hour | 60 minutes or 3,600 seconds |
| 1 conventional day | 24 hours or 86,400 seconds |
What to check
Decide whether you want one unit, a decimal fraction, or mixed units. For example, 1.5 minutes and 1 minute 30 seconds express the same duration in different forms.
Related guides
Sources
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