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Time Converter

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Convert between seconds, minutes, hours, days, weeks, months, and years instantly.

Time Converter

Live
Converted value
1.5 hours
Months and years use calendar averages (30.44 days/month, 365.25 days/year) to account for leap years.

The formula

Result = Value x (seconds per "From" unit) / (seconds per "To" unit)
Example

90 minutes converts to 1.5 hours, or 5,400 seconds, or 0.0625 days.

Step-by-step guide

  1. Enter the value you want to convert.
  2. Choose the "from" and "to" units.
  3. Read the converted result.

Why "months" and "years" need an average, not an exact number

Unlike seconds-to-minutes-to-hours (which are always fixed, exact ratios), months vary from 28 to 31 days and years vary between 365 and 366 days for leap years - there's no single exact "seconds per month" that's always correct. This converter uses standard calendar averages (30.44 days per month, 365.25 days per year) that account for this variation over time, which is accurate for general estimates but won't exactly match a specific calendar month or year.

Common mistakes

Assuming every month is exactly 30 days - this converter uses a more accurate calendar average, which will differ slightly from a flat 30-day assumption.
Using this for calculating the exact duration between two specific calendar dates - for that, use our Date Difference Calculator instead, which accounts for the actual number of days in each specific month involved.

Frequently asked questions

Why isn't there an exact conversion for months?

Because calendar months genuinely vary in length (28-31 days), there's no single "correct" exact answer - only an average that's reasonable for general estimates, not tied to a specific calendar month.

Should I use this for calculating someone's exact age or a specific date range?

No - use our Age Calculator or Date Difference Calculator for exact calendar-based calculations, since this tool uses averages rather than actual calendar dates.

Is a year always treated as exactly 365.25 days here?

Yes - this converter uses 365.25 days as a standard average that accounts for leap years occurring roughly every four years, rather than a plain 365-day year that would drift out of sync with the actual calendar over time.

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