Decimal Hours Calculator

Convert in either direction between H:MM and decimal-hour formats.

Decimal hours represent time as a base-10 number instead of hours and minutes. Convert exact minutes by dividing by 60; for example, 30 minutes is 0.50 hours and 45 minutes is 0.75 hours.

Time format conversion

Examples:

Converted time

Not calculated

Breakdown

Total minutes
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Exact decimal (4 places)
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Displayed decimal
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What are decimal hours?

Decimal hours represent time as a base-10 number instead of hours and minutes. Convert exact minutes by dividing by 60; for example, 30 minutes is 0.50 hours and 45 minutes is 0.75 hours.

Exact minutes remain authoritative. The calculator shows the unrounded conversion before any selected display rounding.

Decimal hours = total minutes ÷ 60.

Worked example

Seven hours 30 minutes is 450 minutes, and 450 divided by 60 equals 7.50 decimal hours.

Important cases
  • 7:59 is 7.9833 before display rounding.
  • Decimal inputs that do not map exactly to a minute are converted to the nearest minute and labeled accordingly.
Complete minutes to decimal hours chart (00–59)

Showing all 60 minute values.

Complete minutes to decimal hours chart (00–59)
MinuteExact decimal (4 places)Rounded hundredth
000.00000.00
010.01670.02
020.03330.03
030.05000.05
040.06670.07
050.08330.08
060.10000.10
070.11670.12
080.13330.13
090.15000.15
100.16670.17
110.18330.18
120.20000.20
130.21670.22
140.23330.23
150.25000.25
160.26670.27
170.28330.28
180.30000.30
190.31670.32
200.33330.33
210.35000.35
220.36670.37
230.38330.38
240.40000.40
250.41670.42
260.43330.43
270.45000.45
280.46670.47
290.48330.48
300.50000.50
310.51670.52
320.53330.53
330.55000.55
340.56670.57
350.58330.58
360.60000.60
370.61670.62
380.63330.63
390.65000.65
400.66670.67
410.68330.68
420.70000.70
430.71670.72
440.73330.73
450.75000.75
460.76670.77
470.78330.78
480.80000.80
490.81670.82
500.83330.83
510.85000.85
520.86670.87
530.88330.88
540.90000.90
550.91670.92
560.93330.93
570.95000.95
580.96670.97
590.98330.98

Conversion values generated from exact minute ÷ 60 calculations. Four-place values are shown before the separately labeled hundredth-hour rounding.

Common questions

Is 7:30 the same as 7.30 hours?

No. Seven hours and 30 minutes equals 7.50 decimal hours.

What are decimal hours?

Decimal hours represent time as a base-10 number instead of hours and minutes. Convert exact minutes by dividing by 60; for example, 30 minutes is 0.50 hours and 45 minutes is 0.75 hours.

Calculated using whole-minute arithmetic. Review the calculation methodology and rounding rules.

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