Time Converter

1 hour = 3600 s · 1 day = 86400 s · 1 year = 31536000 s

Speed, Time & Data

How to Use This Tool

Time Conversion Reference

Convert between time units for scheduling, project planning, and scientific work.

Common Time Equivalents

  • 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 year (365 days) = 31,536,000 seconds

Note: This converter uses the calendar year (365 days). For leap years (366 days) or astronomical years, adjust manually.

Formula & Explanation

Time conversions are based on the SI second, defined as the duration of 9,192,631,770 cycles of radiation from the transition between two hyperfine levels of the ground state of cesium-133.

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Frequently Asked Questions

How many seconds are in a day?

There are exactly 86,400 seconds in a 24-hour day (24 u00d7 60 u00d7 60).

How many hours are in a week?

There are exactly 168 hours in a 7-day week (7 u00d7 24).

Does this converter account for leap years?

No. We use the standard calendar year of 365 days. For a leap year (366 days), multiply our 'year' result by 366/365 = 1.00274.