Time Calculator
With the help of this Time Calculator, you can quickly add or subtract hours, minutes, or seconds from any given time, as well as add or remove time to any date. Adaptable web timer to find the time in X minutes, X hours, X days, etc.
Share This Time Calculator
Related Calculators
How to calculate times
Here, we try to understand how time is calculated. Here, we have to remember a few things. Here, we take an example. It is important to note that many broad assumptions have exceptions when estimating time. For example, a month is approximately four weeks but not exactly 28 days; a year is usually considered to be 365 days but can sometimes be 366 days, et cetera. So, be careful to include it if it applies to your situation. But whether you’re dealing with a leap year or not, this online time calculator will give the exact answer. Just make sure you fill in the above fields with accurate information.
To use the time calculator to add and subtract time, you must first set the starting time.
Second: Base Unit
Minutes: 60 seconds
Hour: 60 minutes
Day: 24 hours
Week: 7 days
Month: 28 to 31 days
Year: 12 months (365 to 366 days)
Let’s say, for example, April 12, 2010, 11:00 (British) or April 12, 2011, 10:00 (American). If necessary, you can calculate the final value to the exact second by adding or subtracting that time using the clock.
Regularly used time units
| Time unit | Equal to | In seconds |
|---|---|---|
| Millennium / kiloyear | 1000 years | it depends |
| Century | 100 years | it depends |
| Decade | 10 years | it depends |
| Year | 365 or 366 days* ~52 weeks | ~31,557,600 seconds |
| Month | ~4 weeks 28-31 days | 2,419,200 - 2,678,400 seconds |
| Week | 7 days 168 hours 10,080 min | 604,800 seconds |
| Day | 24 hours 1,440 min | 86,400 seconds |
| Hour | 60 minutes | 3,600 seconds |
| Minute | 60 seconds | 60 seconds |
| Second | base unit** | - |
History of time ( Clocks )
Early days (sundial and water clock). Thousands of years ago, people believed in nature. The sundial, perhaps the first, used the position of the sun in the sky to determine the date. Another early invention was the water clock, which measured time by passing water from one vessel to another. Used by the Egyptians, Babylonians, and Chinese as early as 1200 B.C.
Magic in the Middle Ages (and Beyond). With the invention of mechanical clocks in Europe in the fourteenth century, timekeeping underwent a big change. The gears used on these early clocks were driven by weights or springs for accuracy. This was a breakthrough when Christian Huygens invented the pendulum clock in the eighteenth century. He made it perfect by using the act of swinging the pendulum to check the clock’s progress.
Atomic Time and Beyond Standardisation: The growth of railroads and communications brought with it the necessity of keeping track of time over great distances. As a result, England established standardized time zones based on the sun’s location at noon on the Greenwich Meridian, sometimes known as Greenwich Mean Time or GMT.
Atomic clocks are now the most precise timekeeping technologies. These clocks measure time to billionths of a second with remarkable accuracy because they rely on the very steady vibrations of atoms.
Compute Time: The evolution of the calendar has always been linked to the computation of time. Agricultural seasons, or lunar cycles, served as the basis for early calendars. It is thought that the Babylonians, who employed the base-60 system of arithmetic, are the source of the idea that a day is divided into 24 hours and an hour into 60 minutes. To keep time, this approach is still in use today. This calculator makes it simple to determine the time difference between two close dates. But you cannot simply compute if there is a significant difference (several years) between two dates. Counting would be quite challenging. To enable our time calculator to be used.
If you have any confusion or doubt then double-check with our Time Calculator.
| Unit | Definition |
|---|---|
| millennium | 1,000 years |
| century | 100 years |
| decade | 10 years |
| year (average) | 365.242 days or 12 months |
| common year | 365 days or 12 months |
| leap year | 366 days or 12 months |
| quarter | 3 months |
| month | 28-31 days Jan., Mar., May, Jul., Aug. Oct., Dec.—31 days Apr., Jun., Sep., Nov.—30 days. Feb.—28 days for a common year and 29 days for a leap year |
| week | 7 days |
| day | 24 hours or 1,440 minutes or 86,400 seconds |
| hour | 60 minutes or 3,600 seconds |
| minute | 60 seconds |
| second | base unit |
| millisecond | 10-3 second |
| microsecond | 10-6 second |
| nanosecond | 10-9 second |
| picosecond | 10-12 second |