Calculate work hours, durations, dates, and age in seconds.

Add, subtract multiple time values in sequence. Instant results, calculation history saved. Convert between time units.

Enter any start and end time to calculate the exact duration. Organize into separate categories. Export PDF reports with Premium.

From any starting date, add or subtract years, months, weeks, days, hours, and minutes to get the resulting date. Calendar-accurate arithmetic.

Calculate exact age in years, months, and days from a birthdate. Save multiple birthdays to track.