How do I convert feet to kilometres?

Divide by 3,280.8399. So 100 feet ÷ 3,280.8399 = 0.03048 kilometres. Because a kilometre is the larger unit, the number always gets smaller — a useful check that you have not multiplied where you should have divided.

What is 1,000 feet in kilometres?

1,000 feet is 0.3048 kilometres. The full sequence for round numbers: 1 foot = 0.0003048 kilometres, 10 feet = 0.003048 kilometres, 100 feet = 0.03048 kilometres, 1,000 feet = 0.3048 kilometres. The relationship is strictly linear, so any value can be scaled from any other.

Is there a quick way to estimate feet to kilometres mentally?

Treat a kilometre as 3,300 feet instead of the exact 3,280.8399. That is out by about 0.58%, which is fine for judging whether something fits and not fine for cutting it. Anything that will be built to should use the exact figure — and there is no reason not to, since it is exact rather than an approximation of something messier.

What is the difference between a mile and a nautical mile?

A nautical mile is 1,852 metres, about fifteen percent longer than the statute mile of 1,609.344 metres, and it exists because it means something geographically: one nautical mile is one minute of arc of latitude. That makes navigation arithmetic trivial on a chart — sixty nautical miles to a degree of latitude, everywhere — which is why it survived in marine and aviation use long after the rest of the imperial system retreated. Speeds in knots are nautical miles per hour, so the two conventions travel together.

Which countries still use imperial length units?

Only three have not formally adopted the metric system — the United States, Liberia and Myanmar — but the practical picture is messier than that suggests. The United Kingdom uses miles and miles per hour on roads while buying petrol in litres and building in millimetres. Canada signs its roads in kilometres and sells lumber in feet. Even in fully metric countries, screen sizes are in inches, plumbing is in inches, and aviation altitudes are in feet worldwide. Conversions are not a legacy problem; they are a permanent feature.

How do I convert an area or a volume?

Square or cube the length factor rather than using it directly. Converting square metres to square feet uses the square of 3.28084, which is 10.7639, and cubic metres to cubic feet uses the cube, 35.3147. The mistake of applying the linear factor to an area is common and produces an answer wrong by a factor of three or so, which is large enough to notice but not always large enough to be obviously absurd. The same logic applies to any derived unit.

Why is an inch exactly 25.4 millimetres?

Because that was the number chosen when the inch was redefined in metric terms. Before 1959 the British and American inches differed very slightly, both being derived from physical standards rather than from each other, and industry had already settled on 25.4 as a working figure for engineering. The International Yard and Pound Agreement made it official by defining the yard as exactly 0.9144 metres, which puts the inch at exactly 25.4 millimetres and removes any residual disagreement. The number is a decision, not a discovery.

Why are there twelve inches in a foot?

Because twelve divides well. It has factors of two, three, four and six, which means a foot can be halved, thirded and quartered without leaving a fraction — a genuine advantage in an era of dividing lengths by eye and by rule rather than by calculation. Ten divides only by two and five. The duodecimal habit runs through older measures generally: twelve pennies to a shilling, twelve hours to a half-day, twelve lines to an inch. Metric traded that divisibility for the ability to convert between units by moving a decimal point, which turned out to matter more.

Feet to Kilometres Converter

Feet to kilometres is the elevation conversion in reverse, and it belongs mainly to hiking, aviation and cycling. American trail guides and aviation charts give heights in feet; European and Asian maps, and almost all scientific data, give them in metres and kilometres. Anyone planning a route or reading a chart across…

VALUE & FROM

0.0003048

1 foot = 0.0003048 kilometer · 1 foot = 0.0003048 kilometer

1 foot IN EVERY UNIT

METRIC (SI)

IMPERIAL / US

NAUTICAL

TYPOGRAPHIC

ASTRONOMICAL

SCIENTIFIC

HISTORICAL & FUN

Created with❤️byeaglecalculator.com

HOW TO USE

1
Type the number of feet into the value box. The converter opens with feet and kilometres already selected, so the answer appears as you type.
2
Read the result in kilometres. The conversion is a division by 3,280.8399, applied at full precision — the displayed rounding is for readability only.
3
Use the search box to switch either unit if you need a different pair. The same converter handles every length unit from the Planck length to the megaparsec.
4
Check the direction as a sanity test: converting to kilometres must make the number smaller, because a kilometre is the larger unit.

FOOT TO KILOMETER TABLE

foot (ft)

kilometer (km)

1 ft

0.0003048 km

2 ft

0.0006096 km

3 ft

0.0009144 km

4 ft

0.0012192 km

5 ft

0.001524 km

10 ft

0.003048 km

15 ft

0.004572 km

20 ft

0.006096 km

25 ft

0.00762 km

50 ft

0.01524 km

100 ft

0.03048 km

1 foot = 0.0003048 kilometer · 1 kilometer = 3,280.8399 foot

QUICK REFERENCE

1 inch

2.54 cm

1 foot

30.48 cm

1 yard

0.9144 m

1 mile

1.609344 km

1 nautical mile

1.852 km

1 kilometer

0.621371 mi

1 meter

3.28084 ft

1 light-year

9.4607×10¹² km

1 AU

149,597,870.7 km

1 parsec

3.26156 ly

ABOUT LENGTH UNITS

Length is measured against the metre, the SI base unit, defined by the speed of light. Every unit here is stored as its exact number of metres, so a conversion is simply the input turned into metres and then into the target unit. The metric prefixes run the full modern range — from the quectometre (10⁻³⁰ m) to the quettametre (10³⁰ m), including the ronna and quetta prefixes added in 2022. The imperial and US units use their exact international definitions (an inch is exactly 2.54 cm), while astronomical units such as the light-year, astronomical unit and parsec, and sub-atomic scales like the ångström, Bohr radius and Planck length, extend the range in both directions. Historical and regional units — cubits, ells, versts, the Scandinavian mile — and playful ones like the smoot use common modern equivalents and can vary by source.

FREQUENTLY ASKED QUESTIONS

One foot is 0.0003048 kilometres. Put the other way round, there are 3,280.8399 feet in a kilometre. That figure is exact rather than approximate: it descends from the 1959 international yard agreement, which defined the yard as precisely 0.9144 metres and the inch as exactly 25.4 millimetres.

1 foot = 0.0003048 kilometres
1 kilometre = 3,280.8399 feet
Exact by definition, not a measurement
10 feet = 0.003048 kilometres

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Last updated: — · 74 length units · Exact SI & imperial definitions · Verified by the EagleCalculator team · Eagle-eyed accuracy for every calculation.