Time converter
Convert seconds, minutes, hours, days, weeks, months and years.
How the calculation works
Time conversion goes through the second. Small units are exact; larger ones (month, year) use averages.
Equivalences
- 1 min = 60 s · 1 h = 3,600 s
- 1 day = 86,400 s · 1 week = 7 days
- 1 year ≈ 365.25 days (average, counting leap years)
- 1 month ≈ 30.44 days (year ÷ 12)
Step-by-step example
How many seconds in 2 hours? 2 × 3,600 = 7,200 s.
Why month and year are approximate
Months have 28–31 days and years 365 or 366. For a generic amount we use the average; for specific dates, use the days-between-dates calculator.
Examples
- 1 day = 1,440 minutes = 86,400 seconds.
- 90 minutes = 1.5 hours.
Frequently asked questions
How many seconds in a day?
86,400 (24 × 60 × 60).
Why is a year 365.25 days here?
It is the average that folds in the leap day every 4 years.
How to add specific hours and dates?
This converter swaps units. To add times or count days between real dates, use the dedicated calculators.
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Updated on June 17, 2026 · by Rafael Rossi · Methodology & sources