Time to Decimal Calculator

Convert hours and minutes to decimals, or back to time.

Hours

Minutes

Or paste 7:45 into Hours.

0.00hours

0 = 0.00 hours · 2 decimal places.

Quick examples

Seconds & decimal places

Seconds (optional)

Decimal places

Batch conversion

Convert a list · CSV

One duration per line

Example

Durations (h:mm or h:mm:ss)

Sum source durations first, then round once.

16.50hours

Input	Exact min	Decimal h
8:30	510	8.50
7:45	465	7.75
0:15	15	0.25

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How to convert time to decimal hours

Divide the minutes by 60, then add the hours. For example, 7 hours 45 minutes is 7 + 45 ÷ 60 = 7.75 hours.

Hours + minutes ÷ 60 = decimal hours

7:45 means 7 hours 45 minutes. 7.45 is a decimal value and represents a different duration.

Common time conversions

Find any minute →

Choose a duration to fill the calculator. Values below use two decimal places.

Show all 60 minute conversions

Minutes to Decimal Hours Chart

Click a minute value to fill the converter. Every row is generated from integer seconds, then rounded to two places.

timetodecimals.com · Whole minutes divided by 60 · Display precision: 2 places

Minutes	Decimal h
	0.02
	0.03
	0.05
	0.07
	0.08
	0.10
	0.12
	0.13
	0.15
	0.17
	0.18
	0.20
	0.22
	0.23
	0.25
	0.27
	0.28
	0.30
	0.32
	0.33
	0.35
	0.37
	0.38
	0.40
	0.42
	0.43
	0.45
	0.47
	0.48
	0.50

Minutes	Decimal h
	0.52
	0.53
	0.55
	0.57
	0.58
	0.60
	0.62
	0.63
	0.65
	0.67
	0.68
	0.70
	0.72
	0.73
	0.75
	0.77
	0.78
	0.80
	0.82
	0.83
	0.85
	0.87
	0.88
	0.90
	0.92
	0.93
	0.95
	0.97
	0.98
	1.00

More about time conversion

Accepted formats and extra minutes

Use a colon for hours and minutes. A decimal point means a fraction of one hour.

Divide minutes by 60 and seconds by 3,600, then add the whole hours. A duration of 8:30 contains eight whole hours and half an hour, so its decimal value is 8.50. The colon separates time units; a decimal point represents a fraction of one hour. These two notations are not interchangeable.

For example, 8.30 decimal hours means eight hours plus 0.30 of an hour. That fraction is eighteen minutes, making the duration 8:18. Use a colon when entering hours and minutes in the Time → Decimal card. Choose Decimal → Time when the value already comes from a spreadsheet or invoice as a decimal.

The result is a duration, not a time of day. Long projects can exceed twenty-four hours without wrapping back to zero. Entering 25:30 gives 25.50 hours. Minutes or seconds greater than fifty-nine automatically carry into the next unit; a notice explains the normalization. Negative entries and unrecognizable formats need correction.

Decimal hours = hours + minutes ÷ 60 + seconds ÷ 3,600

Batch Conversion and Rounding

Add the source durations first, then round the total once.

Paste one duration on each line in Batch. The example list 8:30, 7:45, and 0:15 converts to 8.50, 7.75, and 0.25, for a combined 16.50 hours. Original inputs remain beside their values so you can compare the output with the records you started from. Blank lines are ignored, while invalid lines keep their original line number.

All totals use whole seconds before display rounding. Three one-minute entries each display as 0.02 hours at two places, but their combined duration is three minutes, or 0.05 hours. Adding the rounded rows would incorrectly produce 0.06. Choose more display places when comparing short tasks, but keep the exact total as the basis for further calculations.

CSV exports contain original input, exact minutes, displayed decimal hours, and a final total row. A repeating minute fraction is written as a fraction instead of an approximate decimal. Export and copy are disabled while any row is invalid. Correct those rows first so an incomplete list cannot silently become a final report.

Decimal Hours to Time

Recover hours, minutes and seconds from a decimal-hour value.

Multiply a decimal value by 3,600 to recover total seconds, then divide that total into hours, minutes, and seconds. For example, 1.01 hours becomes 1:00:36. The reverse converter keeps the seconds that a nearest-minute conversion would hide. Decimal entries with finer resolution are resolved once to the nearest whole second.

Copy uses the value currently displayed. Clear returns an empty state and disables copying, while Undo clear restores the previous entries. Calculation inputs are processed in this browser. Downloads are created locally, and no account is needed. Use the related tools for signed adjustments, weekly records, or separate hour and minute fields.

Frequently Asked Questions

What input formats are accepted?

Enter whole hours, h:mm, or h:mm:ss. For example, 8:30 is eight hours and thirty minutes. Negative durations and malformed values are rejected.

Is 8:30 the same as 8.30?

No. Eight hours and thirty minutes equals 8.50 decimal hours. A decimal entry of 8.30 hours is eight hours and eighteen minutes.

How much is one minute?

One minute is 1/60 of an hour. It displays as 0.02 at two decimal places, while three one-minute entries total 0.05 hours.

Can I convert decimal hours back?

Yes. Choose Decimal → Time or open the reverse tool. For example, 1.01 hours becomes 1:00:36. Values are resolved to the nearest whole second.

When does rounding happen?

Time input is stored as whole seconds. Decimal input is resolved once to the nearest second. Totals use those seconds; only the final display is rounded to 2, 3, 4, or 6 places.

Can I export a batch to Excel?

Yes. Paste one duration per line, fix any flagged rows, and download CSV. It includes original input, exact minutes, displayed decimal hours, and the total.

What if minutes or seconds exceed 59?

The tool automatically carries them into the next unit and shows a normalization notice. A duration of 1:90 becomes 2:30, or 2.50 decimal hours.

Is there a daily limit or sign-up?

No sign-up is required. These are durations, not clock times: 25:30 remains 25.50 hours. Calculation inputs are processed locally and are not submitted.