Add and subtract hours, minutes, and seconds — or add a duration to a clock time to see when something ends.
Adding times on a normal calculator fails because 1.30 is not 1 hour 30 minutes. TCalc treats durations and clock times as real time values: 2h 45m + 1h 30m carries the minutes correctly, and 14:00 + 90m knows the answer is a time of day, not a number.
Type expressions naturally — hours as "2h", minutes as "45m", clock times as "14:00" — and chain as many additions and subtractions as you need.
Add two durations — minutes carry over into hours automatically.
Add minutes to a clock time to get a time of day.
When does the movie end? Start time plus runtime.
Subtract time — how much is left.
Keep hours and minutes separate and let the minutes carry: 2h 45m + 1h 30m = 3h 75m = 4h 15m. In TCalc you type "2h 45m + 1h 30m" and it handles the carry for you.
Yes — mixing clock times and durations is exactly what TCalc is built for. 14:00 + 90m gives 3:30 PM, and 19:40 + 2h 12m gives 9:52 PM. The result type switches to a time of day automatically.
Yes, chain as many values as you like: 1h 20m + 45m + 2h 35m = 4h 40m. You can also multiply a duration, e.g. 45m * 6 for six meetings.