# Convert 40 miles to nautical miles

How many nautical miles are 40 miles?

miles (mi)
40 miles = 34.759 nautical miles

## Precise decimal and fraction answers

The conversion in nautical miles rounded to six significant decimal places is 40 mi = 34.759050 nmi. The precise fraction answer is 34 671/884 nmi.

### Decimal Precision

Conversion from one to ten decimal places

• 40 mi = 34.8 nmi
• 40 mi = 34.76 nmi
• 40 mi = 34.759 nmi
• 40 mi = 34.7590 nmi
• 40 mi = 34.75905 nmi
• 40 mi = 34.759050 nmi
• 40 mi = 34.7590497 nmi
• 40 mi = 34.75904968 nmi
• 40 mi = 34.759049676 nmi
• 40 mi = 34.7590496760 nmi

## How many nautical miles are in a mile?

There are 0.869 nautical miles in one mile. A mile is 86.90% of a nautical mile. A nautical mile is 15.08% longer than one mile.

## Miles to nautical miles conversion factor and formulas

Formula

The conversion factor between miles and nautical miles is 1.151. This represents the ratio of miles per one nautical mile. To calculate the value in nautical miles, we can either divide by the conversion factor or multiply by its inverse.

### Division

To convert from miles to nautical miles, divide miles by 1.151.
The formula is expressed as:
mi ÷ 1.151 = nmi

### Multiplication

Alternatively we can multiply by the inverse conversion factor to get the same result.
The inverse of 1.151 is 1/1.151 or 0.869. To convert from miles to nautical miles, multiply miles by 0.869.
The formula is expressed as:
mi × 0.869 = nmi

To convert 40 miles to nautical miles, divide 40 miles by 1.151.
40 mi ÷ 1.151 = 34.759 nmi

## How long are 40 miles?

Real world scale examples to visualize the length of 40 miles / 34.759 nautical miles

• 1.5 times the length of a marathon race (26.6 mi)
• 19% of the distance from London to Paris (214 mi)
• 16% of the altitude of the International Space Station (254 mi)

Converting miles to nautical miles is a conversion between units from separate unit systems - miles are US Customary / UK Imperial defined units while nautical miles are International Hydrographic .

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Customary/Imperial Unit

The mile is a measure of distance between two points used within the US Customary and British Imperial units of measure. It is customarily used to measure large geographical distances. The mile is officially defined as 5,280 feet, 1,760 yards or 1,609.344 meters. The abbreviation or for miles is 'mi' or sometimes 'm' as in miles per hour. The mile's origin stems from the Roman mile, which marked the distance the Roman army could march over 1,000 (mille) paces.

International Hydrographic Unit

The nautical mile is a distance measurement, usually between two geographic points. It is officially defined as being equal to 1,852 meters. The nautical mile, or international nautical mile can be found abbreviated as either M, NM, nmi or nm. Historically the nautical mile was defined as 1/16th of a degree of the earth's latitude. Given this correlation with latitude and longitude, the nautical mile has closely been associated with measurements for navigation. This tradition continues to this day as it remains the unit used to measure distance by the maritime and aviation industries. The prevalent unit of speed over water and air is the knot (nautical miles per hour).

## Reverse this conversion

Convert from nautical miles to miles instead.

## 40 miles to other length units

### Metric

• 40 mi = 64.374 km
• 40 mi = 64,373.76 m
• 40 mi = 643,737.6 dm
• 40 mi = 6,437,376 cm
• 40 mi = 6.437×107 mm
• 40 mi = 6.437×1010 µ
• 40 mi = 6.437×1013 nm

### Imperial/U.S.

• 40 mi = 40 mi
• 40 mi = 70,400 yd
• 40 mi = 211,200 ft
• 40 mi = 2,534,400 in

## References and Citations

1. National Institute of Standards and Technology (NIST) General Tables of Units of Measurement
2. International Hydrographic Organization Resolutions of the International Hydrographic Organization

## Decimal conversions for 40 mi to nmi

mi nmi
40.01 mi 34.768 nmi
40.02 mi 34.776 nmi
40.03 mi 34.785 nmi
40.04 mi 34.794 nmi
40.05 mi 34.802 nmi
40.06 mi 34.811 nmi
40.07 mi 34.82 nmi
40.08 mi 34.829 nmi
40.09 mi 34.837 nmi
40.1 mi 34.846 nmi
40.11 mi 34.855 nmi
40.12 mi 34.863 nmi
40.13 mi 34.872 nmi
40.14 mi 34.881 nmi
40.15 mi 34.889 nmi
40.16 mi 34.898 nmi
40.17 mi 34.907 nmi
40.18 mi 34.915 nmi
40.19 mi 34.924 nmi
40.2 mi 34.933 nmi
40.21 mi 34.942 nmi
40.22 mi 34.95 nmi
40.23 mi 34.959 nmi
40.24 mi 34.968 nmi
40.25 mi 34.976 nmi
40.26 mi 34.985 nmi
40.27 mi 34.994 nmi
40.28 mi 35.002 nmi
40.29 mi 35.011 nmi
40.3 mi 35.02 nmi
40.31 mi 35.028 nmi
40.32 mi 35.037 nmi
40.33 mi 35.046 nmi
40.34 mi 35.055 nmi
40.35 mi 35.063 nmi
40.36 mi 35.072 nmi
40.37 mi 35.081 nmi
40.38 mi 35.089 nmi
40.39 mi 35.098 nmi
40.4 mi 35.107 nmi
40.41 mi 35.115 nmi
40.42 mi 35.124 nmi
40.43 mi 35.133 nmi
40.44 mi 35.141 nmi
40.45 mi 35.15 nmi
40.46 mi 35.159 nmi
40.47 mi 35.167 nmi
40.48 mi 35.176 nmi
40.49 mi 35.185 nmi
40.5 mi 35.194 nmi
mi nmi
40.51 mi 35.202 nmi
40.52 mi 35.211 nmi
40.53 mi 35.22 nmi
40.54 mi 35.228 nmi
40.55 mi 35.237 nmi
40.56 mi 35.246 nmi
40.57 mi 35.254 nmi
40.58 mi 35.263 nmi
40.59 mi 35.272 nmi
40.6 mi 35.28 nmi
40.61 mi 35.289 nmi
40.62 mi 35.298 nmi
40.63 mi 35.307 nmi
40.64 mi 35.315 nmi
40.65 mi 35.324 nmi
40.66 mi 35.333 nmi
40.67 mi 35.341 nmi
40.68 mi 35.35 nmi
40.69 mi 35.359 nmi
40.7 mi 35.367 nmi
40.71 mi 35.376 nmi
40.72 mi 35.385 nmi
40.73 mi 35.393 nmi
40.74 mi 35.402 nmi
40.75 mi 35.411 nmi
40.76 mi 35.419 nmi
40.77 mi 35.428 nmi
40.78 mi 35.437 nmi
40.79 mi 35.446 nmi
40.8 mi 35.454 nmi
40.81 mi 35.463 nmi
40.82 mi 35.472 nmi
40.83 mi 35.48 nmi
40.84 mi 35.489 nmi
40.85 mi 35.498 nmi
40.86 mi 35.506 nmi
40.87 mi 35.515 nmi
40.88 mi 35.524 nmi
40.89 mi 35.532 nmi
40.9 mi 35.541 nmi
40.91 mi 35.55 nmi
40.92 mi 35.559 nmi
40.93 mi 35.567 nmi
40.94 mi 35.576 nmi
40.95 mi 35.585 nmi
40.96 mi 35.593 nmi
40.97 mi 35.602 nmi
40.98 mi 35.611 nmi
40.99 mi 35.619 nmi