Calculator Suite
Time Converter
Convert between seconds, minutes, hours, days, weeks, months and years
Popular Time Converter Conversions
Quick Presets
Base Unit Method
= Value in target unit
= Value in input unit
= Conversion factor to base
= Conversion factor from base
Category-Specific Formula
Time Standards
The second is defined by cesium-133 atoms. All other time units build from this precise foundation.
Calendar Systems
A year averages 365.2425 days (leap years). Months vary 28-31 days.
Work/Productivity
Time conversion helps with scheduling. 1 work week = 40 hours = 2,400 minutes.
Scientific Use
Science uses precise milliseconds and microseconds for experiments and data logging.
Key conversions: 1 day = 86,400 seconds, 1 week = 168 hours, 1 year ≈ 365.25 days. Quick mental math: 1 hour = 3,600 seconds. 1 million seconds ≈ 11.6 days.
Select Units
Choose "From" (e.g., Hours) and "To" (e.g., Minutes).
Enter Duration
Type the time value to convert.
View Result
Get the converted duration instantly.
⏱️ Example: Work Week
40 hours = 2,400 minutes = 144,000 seconds
Assumes:
- • 365.25 days per year (average)
- • 30.4375 days per month (average)
- • No leap second adjustments
Does NOT include:
- • Timezone conversions
- • Daylight saving time
- • Calendar date calculations
How many seconds in a day?
86,400 seconds = 60 × 60 × 24. In a week: 604,800 seconds.
Is a year exactly 365 days?
Average year = 365.2425 days (Gregorian calendar). That's why leap years exist every 4 years (with exceptions).
How long is a million seconds?
1 million seconds ≈ 11.57 days. 1 billion seconds ≈ 31.7 years.
How many hours in a month?
Average month ≈ 730 hours (30.4 days × 24). Ranges from 672 (Feb) to 744 (31-day months).
What is a nanosecond?
1 nanosecond = 10⁻⁹ seconds. Light travels about 30 cm in one nanosecond.