Hours Converter
Convert hours into days, weeks, minutes, seconds and milliseconds, or combine hours/minutes/seconds into decimal hours.
Input Data
Results
At a glance:The hours converter switches between decimal hours and days/weeks/minutes/seconds/ms. 1 day = 24 h, 1 week = 168 h, 1 h = 60 min = 3600 s.
Formula
toUnits: days = hours ÷ 24; weeks = hours ÷ 168; minutes = hours × 60; seconds = hours × 3,600; ms = hours × 3,600,000.
toHours: decimalHours = h + m ÷ 60 + s ÷ 3,600; other units derived from decimalHours.
How to Use
- Pick a mode: hours to other units, or H/M/S to hours.
- Enter hours (or hours/minutes/seconds); results update instantly.
FAQ
Why are weeks shown as decimals?
Because 1 week = 168 hours; non-integer hours become a decimal number of weeks, handy for comparing work time and durations.
What is decimal hours for?
Payroll and timesheets usually bill in decimal hours (e.g. 7.5 h = 7 h 30 min), so you can multiply directly by an hourly rate.
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References
Content reviewed by the Calculatorism editorial team. Results are for reference only; please refer to the relevant authorities for the official figures.