Time Unit Converter

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

Time Unit Converter

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

Duration

From

Enter values above and click Calculate — results will appear here with the formula explained.

fixed seconds per unit; month = 30.44 days average, year = 365.25 days

How does this work?

Most time units divide cleanly — 60, 60, 24, 7 — until calendar reality interrupts. Months range 28–31 days, so converters adopt the average: 30.44 days (365.25 ÷ 12). Years carry the .25 leap allowance for long-run accuracy.

Treat month/year outputs as planning approximations. A 'six-month' project quoted at 182.6 days will actually land wherever its specific six months fall — check a calendar when precision matters.

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Quick Answer

Time Unit Converter: Convert seconds, minutes, hours, days, weeks, months and years. Formula: fixed seconds per unit. Example: 90 minutes equals 1.

How to Use This Calculator

1Enter the duration in whichever unit feels natural.
2Pick the source and target units from the menus to define the direction of conversion.
3Note the averaging assumptions for months and years in longer conversions.

Formula Used

fixed seconds per unit; month = 30.44 days average, year = 365.25 days

Treat month/year outputs as planning approximations. A 'six-month' project quoted at 182.6 days will actually land wherever its specific six months fall — check a calendar when precision matters.

AdSense ready — add NEXT_PUBLIC_GOOGLE_ADSENSE_PUBLISHER_ID

728×90 — AdSense

Worked Example

90 minutes equals 1.5 hours or 0.0625 days. A 90-day trial spans 12.86 weeks — closer to three months minus a few days than 'three months' implies.

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Frequently Asked Questions

QHow many seconds in a day?

86,400 (except leap-second days, which add one — rare and mostly historical now).

QHow many weeks in a year?

52.18 on average; calendars fit either 52 or occasionally 53 full weeks.

QWhy isn't a month just 30 days?

Twelve 30-day months total 360, leaving five-plus days unaccounted — lunar and political history shaped the uneven calendar we inherit.

Formula Used

fixed seconds per unit; month = 30.44 days average, year = 365.25 days

Treat month/year outputs as planning approximations. A 'six-month' project quoted at 182.6 days will actually land wherever its specific six months fall — check a calendar when precision matters.

Frequently Asked Questions

QHow many seconds in a day?

86,400 (except leap-second days, which add one — rare and mostly historical now).

QHow many weeks in a year?

52.18 on average; calendars fit either 52 or occasionally 53 full weeks.

QWhy isn't a month just 30 days?

Twelve 30-day months total 360, leaving five-plus days unaccounted — lunar and political history shaped the uneven calendar we inherit.