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
Converted time
Not calculated
Breakdown
- Total minutes
- Not calculated
- Exact decimal (4 places)
- Not calculated
- Displayed decimal
- Not calculated
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.
| Minute | Exact decimal (4 places) | Rounded hundredth |
|---|---|---|
| 00 | 0.0000 | 0.00 |
| 01 | 0.0167 | 0.02 |
| 02 | 0.0333 | 0.03 |
| 03 | 0.0500 | 0.05 |
| 04 | 0.0667 | 0.07 |
| 05 | 0.0833 | 0.08 |
| 06 | 0.1000 | 0.10 |
| 07 | 0.1167 | 0.12 |
| 08 | 0.1333 | 0.13 |
| 09 | 0.1500 | 0.15 |
| 10 | 0.1667 | 0.17 |
| 11 | 0.1833 | 0.18 |
| 12 | 0.2000 | 0.20 |
| 13 | 0.2167 | 0.22 |
| 14 | 0.2333 | 0.23 |
| 15 | 0.2500 | 0.25 |
| 16 | 0.2667 | 0.27 |
| 17 | 0.2833 | 0.28 |
| 18 | 0.3000 | 0.30 |
| 19 | 0.3167 | 0.32 |
| 20 | 0.3333 | 0.33 |
| 21 | 0.3500 | 0.35 |
| 22 | 0.3667 | 0.37 |
| 23 | 0.3833 | 0.38 |
| 24 | 0.4000 | 0.40 |
| 25 | 0.4167 | 0.42 |
| 26 | 0.4333 | 0.43 |
| 27 | 0.4500 | 0.45 |
| 28 | 0.4667 | 0.47 |
| 29 | 0.4833 | 0.48 |
| 30 | 0.5000 | 0.50 |
| 31 | 0.5167 | 0.52 |
| 32 | 0.5333 | 0.53 |
| 33 | 0.5500 | 0.55 |
| 34 | 0.5667 | 0.57 |
| 35 | 0.5833 | 0.58 |
| 36 | 0.6000 | 0.60 |
| 37 | 0.6167 | 0.62 |
| 38 | 0.6333 | 0.63 |
| 39 | 0.6500 | 0.65 |
| 40 | 0.6667 | 0.67 |
| 41 | 0.6833 | 0.68 |
| 42 | 0.7000 | 0.70 |
| 43 | 0.7167 | 0.72 |
| 44 | 0.7333 | 0.73 |
| 45 | 0.7500 | 0.75 |
| 46 | 0.7667 | 0.77 |
| 47 | 0.7833 | 0.78 |
| 48 | 0.8000 | 0.80 |
| 49 | 0.8167 | 0.82 |
| 50 | 0.8333 | 0.83 |
| 51 | 0.8500 | 0.85 |
| 52 | 0.8667 | 0.87 |
| 53 | 0.8833 | 0.88 |
| 54 | 0.9000 | 0.90 |
| 55 | 0.9167 | 0.92 |
| 56 | 0.9333 | 0.93 |
| 57 | 0.9500 | 0.95 |
| 58 | 0.9667 | 0.97 |
| 59 | 0.9833 | 0.98 |
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.