Conversion Calculators
Time Converter
Convert time between milliseconds, seconds, minutes, hours, days, weeks, average months, and years.
Quick guide
Enter a duration and choose the units to convert between milliseconds, seconds, minutes, hours, days, weeks, months, and years. Months and years use average lengths (30.44 and 365.25 days) because calendar lengths vary.
Read the full explanationHow It Works
Time converts through seconds. Months and years use astronomical averages (month = 30.44 days, year = 365.25 days) since calendar lengths vary.
Formula Used
value × from-factor ÷ to-factor (base unit: second).
Example Calculation
1 week = 168 hours; 1 average year ≈ 31,557,600 seconds.
Practical Use Cases
- Convert durations for projects and contracts.
- Translate seconds into human-readable spans.
- Estimate totals for billing or training hours.