Add Hours and Minutes
Sum of two durations in hours and minutes, in decimal hours, and the difference between them.
Results
Hours
10
h
Minutes
35
min
Hours
10.5833
h
Minutes
295
min
What this tool does
Adding 7 h 45 and 2 h 50 in your head usually goes wrong at the sixty-minute carry. This does the carry properly and also gives the decimal form that payroll and spreadsheets expect.
Formula
total = (h₁×60 + m₁) ± (h₂×60 + m₂)
Variables
| Symbol | Meaning | Unit |
|---|---|---|
h1 | Hours | — |
m1 | Minutes | — |
h2 | Hours | — |
m2 | Minutes | — |
TH | Hours | h |
TM | Minutes | min |
DEC | Hours | h |
DIF | Minutes | min |
Worked example
- Hours7
- Minutes45
- Hours2
- Minutes50
- Hours10 h
- Minutes35 min
- Hours10.5833 h
- Minutes295 min
Limitations
- The calculation runs at full precision and only the display is rounded. If you copy an intermediate value and retype it, small differences can appear.