Калькулятор Додавання і Віднімання Часу

Як користуватися цим калькулятором

1. Введіть Start Time
2. Введіть Operation
3. Введіть Hours
4. Введіть Minutes
5. Натисніть кнопку Розрахувати
6. Прочитайте результат, відображений під калькулятором

How to Add and Subtract Time

Adding or subtracting time requires working in a base-60 system for minutes and a base-24 system for hours. Unlike regular arithmetic, 75 minutes becomes 1 hour 15 minutes, and adding 3 hours to 22:00 wraps around to 01:00 the next day.

This calculator handles all wrapping automatically — so adding 5 hours to 22:30 correctly gives 03:30, not 27:30.

Common Use Cases for Time Calculation

Time addition and subtraction is useful for: scheduling meetings across time zones, calculating shift end times, figuring out arrival times, meal planning and cooking timers, and sports timing.

For example, if a flight departs at 14:45 and takes 7h 20m, it arrives at 22:05. Or if your shift starts at 07:00 and lasts 8.5 hours, it ends at 15:30.

24-Hour vs 12-Hour Time Format

This calculator uses 24-hour (military) time format. To convert: PM hours add 12 (3:00 PM = 15:00). 12:00 PM = 12:00. 12:00 AM = 00:00. Midnight wraps from 23:59 to 00:00.

For crossing midnight, the result will correctly wrap to the early hours of the next day.