CALCULATOR
Adding Hours Calculator
Add two elapsed durations supplied in decimal hours. Example: First hours: 1.5 hours, Second hours: 2.25 hours gives 3.75 hours. Elapsed nonnegative durations only; hours are not wall-clock times. No dates, timezone, midnight crossing or daylight-saving inference.
Elapsed nonnegative durations only; hours are not wall-clock times. No dates, timezone, midnight crossing or daylight-saving inference. Derivation: Ordinary addition of durations expressed in one unit.
Accepted inputs: First hours: 0 to 1,000,000 hours; Second hours: 0 to 1,000,000 hours.
How the calculation works
total hours = first hours + second hours
Worked example
With first hours 1.5 hours, second hours 2.25 hours, add two elapsed durations supplied in decimal hours is 3.75 hours.
Assumptions and limits
Elapsed nonnegative durations only; hours are not wall-clock times. No dates, timezone, midnight crossing or daylight-saving inference. Derivation: Ordinary addition of durations expressed in one unit.