Time units converter — seconds, minutes, hours, days

One hour has 3600 seconds: 1 hour = 60 minutes, and 1 minute = 60 seconds, so 60 × 60 = 3600 seconds.

One day (24 hours) has 1440 minutes: 24 × 60 = 1440 minutes.

One day has 86,400 seconds: 24 × 60 × 60 = 86,400.

A regular year has 365 days; a leap year has 366 days. For averaged calculations, 365.25 days per year is used, accounting for a leap year every 4 years.

A year has 52 full weeks and 1 or 2 extra days. Precisely: 365 ÷ 7 ≈ 52.14 weeks. A leap year (366 days) gives ≈ 52.29 weeks.

One week has 604,800 seconds: 7 × 24 × 60 × 60 = 604,800.

The average month is approximately 30.4375 days (365.25 ÷ 12). Calendar months have 28, 29, 30 or 31 days; the calculator uses the averaged value for accurate conversions.

Divide the number of hours by 24. For example, 72 hours ÷ 24 = 3 days. The calculator does this automatically.

Divide the number of minutes by 60. For example, 150 minutes ÷ 60 = 2.5 hours (2 hours and 30 minutes). The calculator displays the result as a decimal.

This converter is useful for project planning (converting work hours), travel time calculations, physics and maths (SI unit conversions), and data analysis where time is expressed in different units.