Use this calculator to add or subtract time (days, hours, minutes, seconds) from a starting time and date. The result will be the new time and date based on the subtracted or added period of time. To calculate the amount of time (days, hours, minutes, seconds) between times on two different dates, use the … See moreAncient Greece There exist various concepts of time that have been postulated by different philosophers and scientists over an extensive period of human history. … See moreThere are two distinct forms of measurement typically used today to determine time: the calendar and the clock. These measurements of time are based on the … See moreThe Egyptian civilization is often credited as being the first civilization that divided the day into smaller parts, due to documented evidence of their use of sundials. … See moreEarly devices for measuring time were highly varied based on culture and location, and generally were intended to divide the day or night into different periods … See more

Enter a date and time, then use the calculator to add or subtract any number of units …

Use this calculator to perform math operations with time in days, hours, …

Save yourself time and effort and use this add time calculator to automate mundane tasks related to time addition. Have you been asked to calculate your hours and minutes worked? The time …