1. Convert to base units
seconds = input value x input unit factor
Every supported time unit is stored as a factor relative to seconds.
Common unit converter
Time Unit Converter
Convert time units from nanoseconds to years for engineering, physics, programming, testing, scheduling, and everyday calculations.
Live time conversion
Convert time units
Enter a value, choose the starting unit, and select a target unit. The full time conversion table updates automatically.
Converted value
All units
Time conversion table
Compare the entered value across sub-second, everyday, calendar-style, and engineering time units.
Common conversions
Useful time conversion factors
| Conversion | Factor | Typical use |
|---|---|---|
| Milliseconds to seconds | s = ms / 1000 | Timing, controls, testing |
| Seconds to minutes | min = s / 60 | Cycle times and schedules |
| Minutes to hours | h = min / 60 | Work estimates and logs |
| Hours to days | d = h / 24 | Long tests and operations |
| Days to weeks | wk = d / 7 | Planning and schedules |
| Years to seconds | s = yr x 31,536,000 | Science and reliability estimates |
How it works
Time conversion method
2. Convert to target units
target value = base value / target unit factor
The selected result and table values are calculated from the same base value.
3. Check precision
rounding depends on scale
Very small and very large values use compact scientific notation to stay readable.
FAQ
Time converter questions
How do you convert milliseconds to seconds?
Divide milliseconds by 1000 to convert milliseconds to seconds.
How many seconds are in an hour?
There are 3600 seconds in one hour.
Are months and years exact in this converter?
Months use 30 days and years use 365 days, so they are practical engineering approximations rather than calendar-exact values.
Related
Common Unit Converters
Distance Unit Converter
Convert length and distance units including millimeters, meters, kilometers, inches, feet, yards, and miles.
Mass Unit Converter
Convert mass units including grams, kilograms, ounces, pounds, tons, and tonnes.
Velocity Unit Converter
Convert speed and velocity units such as m/s, km/h, mph, ft/s, and knots.