Time to Decimal Calculator

Convert HH:MM:SS to decimal

Enter hours, minutes, and seconds. Tap Calculate to get decimal hours, decimal minutes, and total seconds.

Hours
Minutes
Seconds
hrs
min
sec
Enter a time and tap Calculate.
Time conversion calculators
24-Hour → 12-Hour Military Time Decimal Hours → HH:MM:SS Minutes → HH:MM:SS Seconds → HH:MM:SS Time → Hours Time → Minutes Time → Seconds Any unit ↔ any unit

Time → decimal — quick FAQ

What do the three results mean?

We show decimal hours (e.g., 6.2583 hours), decimal minutes (e.g., 375.5 minutes), and total seconds (e.g., 22,530 seconds) so you can use whatever a system expects.

Can minutes or seconds exceed 59?

Yes. We compute from total duration, so over-60 values still produce the correct decimal totals.

Do you round?

We format up to 6 decimal places and trim trailing zeros. You can round further in your spreadsheet or billing tool.

Turn HH:MM:SS into decimal hours, decimal minutes, and seconds

Why show all three?

Different tools want different units. Payroll and invoicing often use decimal hours, scheduling apps live in minutes, and automation scripts frequently rely on seconds. Instead of making you pick an option first, this page gives you all three totals at once so you can copy the number that fits your workflow.

The formulas behind the scenes

We first convert your entry to a single count of seconds using (hours × 3600) + (minutes × 60) + seconds. From there, decimal minutes are seconds ÷ 60, and decimal hours are seconds ÷ 3600. Because these are fixed unit conversions, time zones and daylight saving never affect the result.

Fast, forgiving input

The three fields sit inside one rounded group with colons, just like a digital time entry. Any empty box counts as zero. Seconds accept decimals using a dot or a comma. If you paste over-60 values into minutes or seconds, that’s fine—we compute from the total duration, not clock rules.

Simple, copy-ready output

After you calculate, the result box shows three clean lines—decimal hours, decimal minutes, and total seconds—using your locale’s number separators. No extra words to strip out, no animations, and no scrolling. Copy the line you need and paste it directly into your invoice, spreadsheet, or config.

Examples you can check
  • 01:45:00 → 1.75 hours, 105 minutes, 6,300 seconds.
  • 00:30:30 → 0.508333 hours, 30.5 minutes, 1,830 seconds.
  • 02:90:00 → 3.5 hours, 210 minutes, 12,600 seconds (overflow accepted).
Related tools when you need formatting

To turn a decimal hour back into a clock string, use Decimal Hours → HH:MM:SS. If you want a single total in a specific unit, try Time → Hours, Time → Minutes, or Time → Seconds. For conversions across weeks, days, milliseconds, and more, open Time Unit Conversions.

From day counts to smaller units

Starting with whole days? Jump straight to Days → Minutes or Days → Seconds. Planning around a specific calendar date? See what date is 365 days from today and related date tools.

Tips for clean exports
  • Confirm the unit your system expects (hours, minutes, or seconds) and copy that line.
  • Round inside your sheet or app to the precision you’re paid for (e.g., two decimals or quarter-hour blocks).
  • Keep the original HH:MM:SS next to the decimal in invoices for easy auditing.
Private and predictable

All arithmetic runs locally in your browser; nothing leaves your device. Results are the same online or offline and don’t depend on locale rules beyond number formatting. If something looks off, check for stray characters—each field should contain digits only (and an optional decimal point/comma for seconds).