Convert Foot to Decimetre
1 foot = 3.048 decimetre (dm). For example, 10 foot = 30.48 decimetre and 100 foot = 304.8 decimetre. Type any value below to convert foot to decimetre both ways — it runs entirely in your browser.
Quick answer: Foot to Decimetre
1 Foot = 3.048 Decimetre (ft → dm). To convert foot to decimetre, multiply by 3.048. To convert decimetre to foot, multiply by 0.328084. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common foot-to-decimetre questions.
How to convert Foot to Decimetre
To convert foot to decimetre, multiply the number of foot by the conversion factor 3.048, because 1 ft = 3.048 dm. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 dm = 0.328084 ft, so you divide by 3.048 (or multiply by 0.328084) to turn decimetre back into foot.
dm = ft × 3.048 ·
ft = dm × 0.328084
- Write down the value you want to convert, in foot.
- Multiply it by 3.048.
- The result is the same area/length/quantity expressed in decimetre.
Foot to Decimetre — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 foot is 15.24 decimetre because 5 ft × 3.048 = 15.24 dm.
| Foot | Calculation | Decimetre |
|---|---|---|
| 1 ft | 1 ft × 3.048 = 3.048 dm | 3.048 dm |
| 2 ft | 2 ft × 3.048 = 6.096 dm | 6.096 dm |
| 3 ft | 3 ft × 3.048 = 9.144 dm | 9.144 dm |
| 5 ft | 5 ft × 3.048 = 15.24 dm | 15.24 dm |
| 7 ft | 7 ft × 3.048 = 21.336 dm | 21.336 dm |
| 10 ft | 10 ft × 3.048 = 30.48 dm | 30.48 dm |
| 12 ft | 12 ft × 3.048 = 36.576 dm | 36.576 dm |
| 15 ft | 15 ft × 3.048 = 45.72 dm | 45.72 dm |
| 20 ft | 20 ft × 3.048 = 60.96 dm | 60.96 dm |
| 25 ft | 25 ft × 3.048 = 76.2 dm | 76.2 dm |
| 50 ft | 50 ft × 3.048 = 152.4 dm | 152.4 dm |
| 100 ft | 100 ft × 3.048 = 304.8 dm | 304.8 dm |
Common Foot to Decimetre conversions
These are the foot-to-decimetre values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 foot = 3.048 decimetre
- 2 foot = 6.096 decimetre
- 2.5 foot = 7.62 decimetre
- 3 foot = 9.144 decimetre
- 4 foot = 12.192 decimetre
- 5 foot = 15.24 decimetre
- 6 foot = 18.288 decimetre
- 7 foot = 21.336 decimetre
- 8 foot = 24.384 decimetre
- 9 foot = 27.432 decimetre
- 10 foot = 30.48 decimetre
- 12 foot = 36.576 decimetre
- 15 foot = 45.72 decimetre
- 20 foot = 60.96 decimetre
- 25 foot = 76.2 decimetre
- 30 foot = 91.44 decimetre
- 50 foot = 152.4 decimetre
- 75 foot = 228.6 decimetre
- 100 foot = 304.8 decimetre
- 200 foot = 609.6 decimetre
- 500 foot = 1,524 decimetre
- 1000 foot = 3,048 decimetre
Foot to Decimetre conversion chart (both directions)
The chart below converts foot to decimetre and decimetre to foot side by side, so it works whichever way you need. 1 foot = 3.048 decimetre, and 1 decimetre = 0.328084 foot.
| Foot → Decimetre | Decimetre → Foot |
|---|---|
| 0.25 ft = 0.762 dm | 0.25 dm = 0.082021 ft |
| 0.5 ft = 1.524 dm | 0.5 dm = 0.164042 ft |
| 1 ft = 3.048 dm | 1 dm = 0.328084 ft |
| 2 ft = 6.096 dm | 2 dm = 0.656168 ft |
| 3 ft = 9.144 dm | 3 dm = 0.984252 ft |
| 4 ft = 12.192 dm | 4 dm = 1.312336 ft |
| 5 ft = 15.24 dm | 5 dm = 1.64042 ft |
| 6 ft = 18.288 dm | 6 dm = 1.968504 ft |
| 7 ft = 21.336 dm | 7 dm = 2.296588 ft |
| 8 ft = 24.384 dm | 8 dm = 2.624672 ft |
| 9 ft = 27.432 dm | 9 dm = 2.952756 ft |
| 10 ft = 30.48 dm | 10 dm = 3.28084 ft |
| 12 ft = 36.576 dm | 12 dm = 3.937008 ft |
| 15 ft = 45.72 dm | 15 dm = 4.92126 ft |
| 20 ft = 60.96 dm | 20 dm = 6.56168 ft |
| 25 ft = 76.2 dm | 25 dm = 8.2021 ft |
| 30 ft = 91.44 dm | 30 dm = 9.84252 ft |
| 40 ft = 121.92 dm | 40 dm = 13.12336 ft |
| 50 ft = 152.4 dm | 50 dm = 16.4042 ft |
| 75 ft = 228.6 dm | 75 dm = 24.6063 ft |
| 100 ft = 304.8 dm | 100 dm = 32.8084 ft |
| 150 ft = 457.2 dm | 150 dm = 49.2126 ft |
| 200 ft = 609.6 dm | 200 dm = 65.6168 ft |
| 250 ft = 762 dm | 250 dm = 82.021 ft |
| 500 ft = 1,524 dm | 500 dm = 164.042 ft |
| 1000 ft = 3,048 dm | 1000 dm = 328.084 ft |
Foot vs Decimetre: which is bigger?
A foot is the larger unit: one foot equals 3.048 decimetres. Put another way, you need 3.048 decimetres to make a single foot.
What is a Foot? History, origin and usage
The foot is one of the most ancient units, based on the length of a human foot, and appeared in the Greek, Roman, Chinese and English systems with values ranging from about 250 to 335 mm. The English foot was eventually fixed at 12 inches, and since the 1959 international agreement it equals exactly 0.3048 metres.
The foot is still used in the US and UK for human height, building dimensions and, worldwide, aviation altitudes, since pilots almost everywhere report altitude in feet. It divides into 12 inches, and three feet make a yard.
Aircraft altitudes are measured in feet even in fully metric countries, a legacy of aviation's English-speaking origins. Historically the foot's length differed not only between countries but sometimes between trades within a single city.
What is a Decimetre? History, origin and usage
The decimetre is the metre divided by ten, using the prefix 'deci-' from the Latin decimus, 'tenth'. It was one of the original submultiple prefixes introduced with the metric system in France in 1795.
The decimetre is rarely used in everyday speech, overshadowed by the centimetre and the metre. It appears mostly in classrooms illustrating decimal place value, though it stays quietly relevant because a cubic decimetre is exactly one litre.
Because a cubic decimetre equals one litre, the decimetre underpins the metric measurement of liquid volume. Its prefix 'deci-' is Latin, unlike the Greek-derived prefixes used for the larger metric steps.
Convert 1 Foot to other units
It can help to see a foot next to the other units it is commonly compared with. One foot (ft) is equal to:
| 1 Foot equals | Unit |
|---|---|
| 0.0003048 km | Kilometre |
| 0.3048 m | Metre |
| 3.048 dm | Decimetre |
| 30.48 cm | Centimetre |
| 304.8 mm | Millimetre |
| 304,800 µm | Micrometre |
| 0.0001893939 mi | Mile |
| 0.3333333 yd | Yard |
| 12 in | Inch |
| 0.0001645788 nmi | Nautical Mile |
| 0.001515152 fur | Furlong |
| 0.01515152 ch | Chain |
| 1.515152 li | Link |
| 0.06060606 rd | Rod |
| 0.06060606 pole | Pole |
| 0.1666667 ftm | Fathom |
| 3 hand | Hand |
| 1.333333 span | Span |
| 2.666667 finger | Finger |
| 0.6666667 cubit | Cubit |
| 0.05 rope | Rope |
| 0.16764 ken | Ken |
| 0.00006313131 lea | League |
| 864 pt | Point |
| 0.000000000002037462 AU | Astronomical Unit |
| 0.00000000000000003221739 ly | Light-year |
| 0.03048 dam | Decametre |
| 0.003048 hm | Hectometre |
| 0.00005485961 nl | Nautical League |
Convert 1 Decimetre to other units
One decimetre (dm) is equal to:
| 1 Decimetre equals | Unit |
|---|---|
| 0.0001 km | Kilometre |
| 0.1 m | Metre |
| 10 cm | Centimetre |
| 100 mm | Millimetre |
| 100,000 µm | Micrometre |
| 0.00006213712 mi | Mile |
| 0.1093613 yd | Yard |
| 0.328084 ft | Foot |
| 3.937008 in | Inch |
| 0.00005399568 nmi | Nautical Mile |
| 0.000497097 fur | Furlong |
| 0.00497097 ch | Chain |
| 0.497097 li | Link |
| 0.01988388 rd | Rod |
| 0.01988388 pole | Pole |
| 0.05468066 ftm | Fathom |
| 0.984252 hand | Hand |
| 0.4374453 span | Span |
| 0.8748906 finger | Finger |
| 0.2187227 cubit | Cubit |
| 0.0164042 rope | Rope |
| 0.055 ken | Ken |
| 0.00002071237 lea | League |
| 283.4646 pt | Point |
| 0.0000000000006684587 AU | Astronomical Unit |
| 0.00000000000000001057001 ly | Light-year |
| 0.01 dam | Decametre |
| 0.001 hm | Hectometre |
| 0.00001799856 nl | Nautical League |
Tips for converting Foot to Decimetre
- To go from foot to decimetre, multiply by 3.048; to go back, divide by 3.048 (or multiply by 0.328084).
- For a quick mental estimate, remember that 1 foot ≈ 3.048 decimetre, so 10 foot ≈ 30.48 decimetre.
- The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
- Both fields update live as you type — change either side to convert in that direction.
How to use this Foot to Decimetre converter
Type a number into the Foot field and the equivalent in Decimetre appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the Decimetre field to convert the other way (decimetre to foot). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 ft = 3.048 dm), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for foot-to-decimetre conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.
Sources
- NIST Special Publication 811 — Guide for the Use of the SI — publishes the exact metric equivalents of the customary units. The inch, foot, yard and mile are defined exactly in metres by the 1959 international yard-and-pound agreement, so every imperial figure on this page is exact, not rounded.
- BIPM — The International System of Units (SI Brochure) — the defining document for the SI, published by the International Bureau of Weights and Measures. It fixes the base unit that this conversion resolves to, which is why the factor here can be exact rather than approximate.
The metric units (km, m, cm, mm, µm) are exact by definition, and the imperial units (mile, yard, foot, inch, nautical mile) use their exact international values. Traditional units (hand, span, finger, cubit, rod/pole, link, rope, ken, league) are given at their commonly accepted standard sizes — historical local values sometimes differed, so confirm against a primary source before relying on them for legal or historical work.
Frequently asked questions
- How many decimetre are in 1 foot?
- 1 foot = 3.048 decimetre (dm). To convert any number of foot to decimetre, multiply by 3.048.
- How do I convert foot to decimetre?
- Multiply the number of foot by 3.048. For example, 10 foot = 10 × 3.048 = 30.48 decimetre, and 25 foot = 76.2 decimetre.
- How many foot are in 1 decimetre?
- 1 decimetre = 0.328084 foot. So to convert decimetre back to foot, multiply by 0.328084.
- What is the formula to convert foot to decimetre?
- decimetre = foot × 3.048. The reverse formula is foot = decimetre × 0.328084.
- How much is 100 foot in decimetre?
- 100 foot = 304.8 decimetre. (And 1000 foot = 3,048 decimetre.)
- Which is bigger, a foot or a decimetre?
- A foot is larger: 1 foot = 3.048 decimetre.
- Is this foot to decimetre converter accurate?
- Yes — every value is computed from the exact 3.048 dm per ft factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert decimetre to foot too?
- Yes. The converter works both ways — enter a value in either field. 1 decimetre = 0.328084 foot.