## Calculator Use

- Convert hours to minutes, and
- Convert hours to minutes and seconds, and
- Convert hours to hh:mm:ss

## How to Convert Hours to Minutes

Since there are 60 minutes in an hour, minutes equals hours times 60 minutes per hour or, minutes = hours × 60 minutes/hour.

Example: 5 hours to minutes conversion.

- Identify the unit conversion ratio for
*hr*to*min*- Use the known equality:

1 hr = 60 min - Divide both sides by minutes to find the conversion ratio,

60 min / 1 hr = 1

- Use the known equality:
- Multiply hours by the conversion ratio and cancel units to convert the value to
*min*- 5
~~hr~~× 60 min / 1~~hr~~= (5 × 60) min = 300 min

- 5

For quick conversions multiply by 60

min × 60 = hr

Quick Conversion

Multiply by

or Divide by

convert hours to minutes

60

0.0166667

convert minutes to hours

0.0166667

60

To convert among other time units use the Time Converter.

### Formula

Mathematically, converting say 3 hours to minutes, we write our equation with units that will convert to minutes.

3 hours × 60 minutes per 1 hour = 3 hr × 60 min/hr

Cancel out the hours and we are left with minutes

3 ~~hr~~ × 60 min/~~hr~~ = **180 min**

\[ \text{total minutes} = \text{total hours} \times 60 \dfrac{\text{minutes}}{\text{hour}} \]

## Hour

An hour is a unit of time. The symbol for hour is **h** and is often abbreviated **hr** in everyday usage. Relating hours to other units of time 1 hour = 60 minutes = 3600 seconds = 1/24 day = 0.0416 days. Hours is abbreviated **hh** when used as part the worldwide format of time **hh:mm:ss**. It indicates hours expressed in two digits from 00 to 12 for a twelve-hour clock or 00 to 24 for a twenty-four-hour clock. **mm** is minutes and **ss** is seconds.

## Minute

A minute is a unit of time. The symbol for minutes, and its abbreviation, are both **min**. Relating minutes to other units of time 1 minute = 60 seconds = 1/60 hour = 0.016 hours = 1/1440 day = 0.000694 days. Minutes is abbreviated **mm** when used as part the worldwide format of time **hh:mm:ss**. It indicates minutes expressed in two digits from 00 to 59. **hh** is hours and **ss** is seconds.

### Hours to Minutes Charts of Common Conversions

Charts are printable by using the **Print Chart** link at the bottom of each chart.

Decimal Hours | Minutes | Decimal Hours | Minutes | Decimal Hours | Minutes | ||
---|---|---|---|---|---|---|---|

0.02 | 1 | 0.35 | 21 | 0.68 | 41 | ||

0.03 | 2 | 0.37 | 22 | 0.70 | 42 | ||

0.05 | 3 | 0.38 | 23 | 0.72 | 43 | ||

0.07 | 4 | 0.40 | 24 | 0.73 | 44 | ||

0.08 | 5 | 0.42 | 25 | 0.75 | 45 | ||

0.10 | 6 | 0.43 | 26 | 0.77 | 46 | ||

0.12 | 7 | 0.45 | 27 | 0.78 | 47 | ||

0.13 | 8 | 0.47 | 28 | 0.80 | 48 | ||

0.15 | 9 | 0.48 | 29 | 0.82 | 49 | ||

0.17 | 10 | 0.50 | 30 | 0.83 | 50 | ||

0.18 | 11 | 0.52 | 31 | 0.85 | 51 | ||

0.20 | 12 | 0.53 | 32 | 0.87 | 52 | ||

0.22 | 13 | 0.55 | 33 | 0.88 | 53 | ||

0.23 | 14 | 0.57 | 34 | 0.90 | 54 | ||

0.25 | 15 | 0.58 | 35 | 0.92 | 55 | ||

0.27 | 16 | 0.60 | 36 | 0.93 | 56 | ||

0.28 | 17 | 0.62 | 37 | 0.95 | 57 | ||

0.30 | 18 | 0.63 | 38 | 0.97 | 58 | ||

0.32 | 19 | 0.65 | 39 | 0.98 | 59 | ||

0.33 | 20 | 0.67 | 40 | 1.00 | 60 | ||

© CalculatorSoup |

Decimal Hours | Minutes | Decimal Hours | Minutes | Decimal Hours | Minutes | ||
---|---|---|---|---|---|---|---|

0.0167 | 1 | 0.3500 | 21 | 0.6833 | 41 | ||

0.0333 | 2 | 0.3667 | 22 | 0.7000 | 42 | ||

0.0500 | 3 | 0.3833 | 23 | 0.7167 | 43 | ||

0.0667 | 4 | 0.4000 | 24 | 0.7333 | 44 | ||

0.0833 | 5 | 0.4167 | 25 | 0.7500 | 45 | ||

0.1000 | 6 | 0.4333 | 26 | 0.7667 | 46 | ||

0.1167 | 7 | 0.4500 | 27 | 0.7833 | 47 | ||

0.1333 | 8 | 0.4667 | 28 | 0.8000 | 48 | ||

0.1500 | 9 | 0.4833 | 29 | 0.8167 | 49 | ||

0.1667 | 10 | 0.5000 | 30 | 0.8333 | 50 | ||

0.1833 | 11 | 0.5167 | 31 | 0.8500 | 51 | ||

0.2000 | 12 | 0.5333 | 32 | 0.8667 | 52 | ||

0.2167 | 13 | 0.5500 | 33 | 0.8833 | 53 | ||

0.2333 | 14 | 0.5667 | 34 | 0.9000 | 54 | ||

0.2500 | 15 | 0.5833 | 35 | 0.9167 | 55 | ||

0.2167 | 16 | 0.6000 | 36 | 0.9333 | 56 | ||

0.2833 | 17 | 0.6167 | 37 | 0.9500 | 57 | ||

0.3000 | 18 | 0.6333 | 38 | 0.9667 | 58 | ||

0.3167 | 19 | 0.6500 | 39 | 0.9833 | 59 | ||

0.3333 | 20 | 0.6667 | 40 | 1.0000 | 60 | ||

© CalculatorSoup |

Decimal Hours | Fraction Hours | Minutes | |||||
---|---|---|---|---|---|---|---|

0.1 | 1/10 | 6 | |||||

0.2 | 2/10 = 1/5 | 12 | |||||

0.3 | 3/10 | 18 | |||||

0.4 | 4/10 = 2/5 | 24 | |||||

0.5 | 5/10 = 1/2 | 30 | |||||

0.6 | 6/10 = 3/5 | 36 | |||||

0.7 | 7/10 | 42 | |||||

0.8 | 8/10 = 4/5 | 48 | |||||

0.9 | 9/10 | 54 | |||||

1.0 | 10/10 = 1 | 60 | |||||

0.083 | 1/12 | 5 | |||||

0.16 | 2/12 = 1/6 | 10 | |||||

0.25 | 3/12 = 1/4 | 15 | |||||

0.3 | 4/12 = 1/3 | 20 | |||||

0.416 | 5/12 | 25 | |||||

0.5 | 6/12 = 1/2 | 30 | |||||

0.583 | 7/12 | 35 | |||||

0.6 | 8/12 = 2/3 | 40 | |||||

0.75 | 9/12 = 3/4 | 45 | |||||

0.83 | 10/12 = 5/6 | 50 | |||||

0.916 | 11/12 | 55 | |||||

1.0 | 12/12 = 1 | 60 | |||||

1 | 1 | 60 | |||||

1.25 | 1 1/4 | 75 | |||||

1.5 | 1 1/2 | 90 | |||||

1.75 | 1 3/4 | 105 | |||||

2 | 2 | 120 | |||||

3 | 3 | 180 | |||||

4 | 4 | 240 | |||||

5 | 5 | 300 | |||||

6 | 6 | 360 | |||||

7 | 7 | 420 | |||||

8 | 8 | 480 | |||||

9 | 9 | 540 | |||||

10 | 10 | 600 | |||||

11 | 11 | 660 | |||||

12 | 12 | 720 | |||||

24 | 24 | 1440 | |||||

© CalculatorSoup |

### Example:

Convert 7.25 hours to minutes.

7.25 hr × 60 min/hr

= 7.25 ~~hr~~ × 60 min/~~hr~~

= 435 min

Convert 435 minutes to seconds.

435 min × 60 sec/min

= 435 ~~min~~ × 60 sec/~~min~~

= 26,100 sec

Convert 7.25 hours to hh:mm:ss format.

We have 7 hours with 0.25 decimal hours.

From the table above we see 0.25 hours = 15 minutes

Alternatively, 0.25 hours × 60 minutes/hour = 15 minutes.

Therefore, **7.25 hours = 07:15:00**