HesapHanem

Time Converter

Convert between time units.

How it is calculated

Every unit is first converted to seconds, then divided down to the others. The factors are: 1 minute = 60 s, 1 hour = 3,600 s, 1 day = 86,400 s and 1 week = 604,800 s. So seconds = value × factor of the unit you chose, minutes = seconds ÷ 60, hours = seconds ÷ 3,600, days = seconds ÷ 86,400 and weeks = seconds ÷ 604,800. The tool shows all five results at once, with two decimals, and with more digits for values below 1. A day is exactly 24 hours here, so calendar effects such as daylight-saving changes, leap seconds, and months of different length are not part of the calculation.

Worked example

Convert 90 minutes. Seconds = 90 × 60 = 5,400. Minutes = 5,400 ÷ 60 = 90. Hours = 5,400 ÷ 3,600 = 1.5. Days = 5,400 ÷ 86,400 = 0.0625, which rounds to 0.06. The tool shows 5,400.00 seconds, 90.00 minutes, 1.50 hours and 0.06 days.

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Common mistakes

  • Leaving the unit on the wrong setting. The default is hours, so typing 90 meaning minutes gives 90 hours (5,400 minutes) instead.
  • Reading 1.5 hours as 1 hour 5 minutes. The decimal is a fraction of an hour: 0.5 hour is 30 minutes.
  • Expecting a month or year result. The tool stops at days; a month has no fixed length in seconds.
  • Assuming rounding hides nothing. 0.06 days is rounded from 0.0625, so use the seconds or hours column for precision.
  • Mixing it up with clock time. 90 minutes is a duration, not 9:00 or 1:30 on a clock.

About this calculator

This tool converts a duration between seconds, minutes, hours, days and weeks, handling the mixed base-60/base-24/base-7 arithmetic (60 seconds to a minute, 60 minutes to an hour, 24 hours to a day, 7 days to a week) that makes time awkward to convert by hand compared to metric units.

Project managers converting a task estimate given in hours into days for a schedule, developers converting a timeout or delay value between milliseconds-adjacent units, and students working through physics or chemistry problems that mix units (a reaction time in seconds within a process measured in hours) all use this to avoid an off-by-60 or off-by-24 error.

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Comments (1)

  • Editorial team

    A common use is turning a task estimate into schedule days. The days column divides by 24 hours, so 36 hours shows 1.50 days, but a working day is closer to 8 hours, so divide the hours result by 8 instead. Which time conversion do you end up doing most often?

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