# Convert feet to millimeters

Enter the number of feet you want to convert to millimeters in the text box below. The conversion to length in millimeters will update as you type.

feet (ft)
1 feet = 304.8 millimeters

## Precise decimal and fraction answers

The conversion in millimeters rounded to six significant decimal places is 1 ft = 304.800000 mm. The precise fraction answer is 304 4/5 mm.

### Decimal Precision

Conversion from one to ten decimal places

• 1 ft = 304.8 mm
• 1 ft = 304.80 mm
• 1 ft = 304.800 mm
• 1 ft = 304.8000 mm
• 1 ft = 304.80000 mm
• 1 ft = 304.800000 mm
• 1 ft = 304.8000000 mm
• 1 ft = 304.80000000 mm
• 1 ft = 304.800000000 mm
• 1 ft = 304.8000000000 mm

## How many millimeters are in a foot?

There are 304.8 millimeters in one foot. A foot is 304.8 times longer than a millimeter. A millimeter is 0.33% of a foot

## Feet to millimeters conversion factor and formulas

Formula

The conversion factor between feet and millimeters is 304.8. This represents the ratio of millimeters per one foot. To calculate the value in millimeters, we can either multiply by the conversion factor or divide by its inverse.

### Multiplication

To convert from feet to millimeters, multiply feet by 304.8.
The formula is expressed as:
ft × 304.8 = mm

### Division

Alternatively we can divide by the inverse conversion factor to get the same result.
The inverse of 304.8 is 1/304.8 or 0.003. To convert from feet to millimeters, divide feet by 0.003.
The formula is expressed as:
ft ÷ 0.003 = mm

Converting feet to millimeters is a conversion between units from separate unit systems - feet are US Customary / UK Imperial defined units while millimeters are metric (SI) .

Customary/Imperial Unit

The foot is a length unit of measure within the US Customary and UK Imperial systems. It is commonly abbreviated as ft or using the ' symbol. The official definition of the foot is 0.3048 meters. Within the Imperial system, the foot is equal to 12 inches or 1/3 of a yard. The foot is very widely used within the United States in situations where nearly the rest of the world would measure in meters. Globally, the foot is used by the aviation community as the standard measurement of flight altitude eg. 35,000 feet.

SI Unit

Within the SI (metric) system of measurement, the millimeter is officially defined as one thousandth (1/1,000) of a meter. It is commonly used when measuring very short lengths. Internationally it is spelled 'millimetre' whereas the U.S. spells it 'millimeter'. The symbol for millimeters is mm.

## Reverse this conversion

Convert from millimeters to feet instead.

## 1 feet to other length units

### Metric

• 1 ft = 3.048×10-4 km
• 1 ft = 0.305 m
• 1 ft = 3.048 dm
• 1 ft = 30.48 cm
• 1 ft = 304.8 mm
• 1 ft = 304,800 µ
• 1 ft = 3.048×108 nm

### Imperial/U.S.

• 1 ft = 1.894×10-4 mi
• 1 ft = 0.333 yd
• 1 ft = 1 ft
• 1 ft = 12 in

## References and Citations

1. National Institute of Standards and Technology (NIST) General Tables of Units of Measurement
2. International Bureau of Weights and Measures (BIPM) The International System of Units (SI)

## Feet to millimeters conversion table

ft mm
1 ft 304.8 mm
2 ft 609.6 mm
3 ft 914.4 mm
4 ft 1,219.2 mm
5 ft 1,524 mm
6 ft 1,828.8 mm
7 ft 2,133.6 mm
8 ft 2,438.4 mm
9 ft 2,743.2 mm
10 ft 3,048 mm
ft mm
20 ft 6,096 mm
30 ft 9,144 mm
40 ft 12,192 mm
50 ft 15,240 mm
60 ft 18,288 mm
70 ft 21,336 mm
80 ft 24,384 mm
90 ft 27,432 mm
100 ft 30,480 mm
1,000 ft 304,800 mm