Time Converter
Convert between time units from milliseconds to years instantly. Enter a value, choose your unit, and see all conversions at once.
How to Use the Time Converter
Converting between time units is quick and simple:
- Enter a numeric value in the input field. Decimals are fully supported.
- Select the source unit from the dropdown (milliseconds, seconds, minutes, hours, days, weeks, months, or years).
- View all conversions in the results table. Calculations happen instantly as you type.
- Click Copy next to any result to copy the value to your clipboard.
About Time Measurement
Time is one of the seven fundamental physical quantities in the International System of Units (SI). The second is the SI base unit of time, defined by the cesium-133 atomic clock. Common time units scale predictably: 1 minute = 60 seconds, 1 hour = 60 minutes, 1 day = 24 hours, and 1 week = 7 days.
Months and years are less uniform. Calendar months range from 28 to 31 days, so an average month of 30.44 days is used for calculations. A Julian year of 365.25 days accounts for leap years. These conversions are important for project planning, scientific research, age calculations, and software development where time precision matters.
Frequently Asked Questions
There are exactly 86,400 seconds in one day (24 hours × 60 minutes × 60 seconds).
A common year has 365 days. Accounting for leap years, the average year length is 365.25 days, which is the Julian year used in astronomical calculations.
For conversion purposes, one month is defined as 30.44 days (365.25 days ÷ 12 months). This represents the average month length accounting for varying month lengths and leap years.