What Is a Time Converter?
A time converter translates a duration from one unit of time to another. The second is the base unit of time in the International System of Units (SI), defined by the cesium-133 atom: one second is the duration of 9,192,631,770 periods of radiation corresponding to the transition between two hyperfine levels of the ground state. Every larger unit of time builds on the second. Sixty seconds make a minute, sixty minutes make an hour, and twenty-four hours make a day.
Beyond the day, conversions become approximate. A week is exactly seven days. A month varies from 28 to 31 days, so this converter uses the Gregorian calendar average of 30.436875 days (365.2425 divided by 12). A year is 365.2425 days on average, accounting for leap years. For adding and subtracting time values, try our Time Calculator.
What This Calculator Does
This time converter supports seven common units: seconds, minutes, hours, days, weeks, months, and years. Enter a value, pick the source and target units, and the result appears instantly. A swap button reverses the conversion, and a full table shows your input in every supported unit.
- Inputs: A numeric value, source unit, and target unit
- Outputs: Converted result, conversion details, and a table of all units
How the Conversion Works
The calculator first converts the input to seconds, the base unit, then divides by the target unit's factor in seconds. For example, converting 2 hours to minutes: 2 hours times 3,600 equals 7,200 seconds. Dividing by 60 gives 120 minutes. For calculating total hours between two times, use our Hours Calculator.
Common Conversion Factors
- 1 minute = 60 seconds
- 1 hour = 60 minutes = 3,600 seconds
- 1 day = 24 hours = 86,400 seconds
- 1 week = 7 days = 604,800 seconds
- 1 month = 30.436875 days = 2,629,746 seconds (Gregorian average)
- 1 year = 365.2425 days = 31,556,952 seconds (Gregorian average)
How to Use the Calculator
- Enter the time value you want to convert
- Select the unit you are converting from
- Select the unit you are converting to
- Read the result, or click swap to reverse the direction
Real World Scenarios
A project manager wants to express a 90-day deadline in weeks: 90 days divided by 7 equals approximately 12.86 weeks. A scientist needs to convert 2.5 years into seconds for a calculation: 2.5 times 31,556,952 equals 78,892,380 seconds. For calculating the exact duration between two dates and times, see our Time Duration Calculator.