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Time to Decimal Calculator

Time to Decimal Calculator

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This calculator converts an h:m:s time into a single decimal hours number (e.g. 7:30:00 → 7.5).

The reverse of Decimal to Time — useful for entering clock-format hours into a spreadsheet or payroll system that expects a single decimal number.

The conversion adds the hours to the minutes divided by 60 and the seconds divided by 3600 — 7 hours 30 minutes works out to 7 + 30/60, or exactly 7.5 decimal hours. This is the direction most useful when a timesheet was originally recorded in clock format (perhaps from a physical time clock or a calendar app) but needs to go into a payroll system or spreadsheet formula that expects decimal hours, since decimal values sum correctly across multiple shifts without the manual carrying that clock-format addition requires.

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  • Formula: Decimal Hours = Hours + Minutes ÷ 60 + Seconds ÷ 3600.
  • Example: 7 hours 30 minutes = 7 + 30/60 = 7.5 decimal hours.
  • Tip: for payroll, decimal hours make it easy to sum multiple shifts (7.5 + 8.25 = 15.75) without manual carrying.

What is 8 hours 15 minutes as a decimal?

8 + 15/60 = 8.25 decimal hours.

How do I convert just minutes to decimal hours?

Leave hours and seconds at 0, enter your minute value — e.g. 45 minutes = 0.75 decimal hours.