Time Calculator
Add or subtract time durations, measure the gap between two dates and times, shift a date by a duration, or convert between time units. Everything is calculated instantly in your browser — nothing is uploaded or stored.
Enter hours, minutes and seconds for each duration. Use the + / − button on the left of a row to add or subtract that duration, then calculate the total.
Find how much time passes between two moments. Great for shifts, travel time, events and project durations. Enter a break in minutes if you need to subtract it.
Start from a specific date and time, then add or subtract a duration to find the resulting moment — useful for deadlines, reminders and delivery windows.
Convert any time value into weeks, days, hours, minutes and seconds at once.
