Everyday & Conversions
Add Time Calculator
Add hours, minutes and seconds together and see the total as a clean duration and in decimal hours.
Your inputs
Change any value to update the result instantly.
Total time
4 h 26 min 15 s
Hours : minutes : seconds
4:26:15
Total seconds
15,975 s
Total minutes
266.25 min
Decimal hours
4.438 h
What this calculator does
Adds two durations expressed in hours, minutes and seconds.
What your result means
The combined duration, shown as HH:MM:SS and in decimal hours.
Formula and working
Total seconds = Σ(hours × 3600 + minutes × 60 + seconds)
- 1
Collect the inputs
First duration — hours = 2 h; First duration — minutes = 45 min; First duration — seconds = 30 s; Second duration — hours = 1 h; Second duration — minutes = 40 min; Second duration — seconds = 45 s
- 2
Apply the formula
Total seconds = Σ(hours × 3600 + minutes × 60 + seconds)
- 3
Result
Total time = 4 h 26 min 15 s hours
Frequently asked questions
Symbols and assumptions
- T
- Total duration in seconds
- • All inputs are durations, not clock times.
Sources and review
Reviewed 2026-09-22 · Next review 2027-09-22
- • Durations are summed exactly; no rounding is applied before the final display.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Report a mistake or request an improvement
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