Convert Foot to Decimeter
Convert feet to decimeters instantly. 1 foot = 3.048 decimeter — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Decimeter to Foot converter for the reverse conversion.
Units explained
Foot
A foot is an Imperial and US customary unit of length equal to 12 inches or exactly 0.3048 meters. It is the most commonly used unit of length in everyday measurement in the United States.
The foot's origin is literally the length of a human foot, used as a measurement standard since antiquity. The English foot was standardized at various points in history; the modern international foot (0.3048 m exactly) was fixed by the 1959 International Yard and Pound Agreement.
Feet are used in the US for body height, building dimensions, room sizes, road sign clearances, aviation altitude (feet above sea level), and most everyday distance estimation. The UK uses feet informally for height despite officially being metric.
Used since antiquity; standardized to 0.3048 m exactly by the International Yard and Pound Agreement of 1959. Aviation worldwide uses feet for altitude despite metric adoption elsewhere.
Decimeter
A decimeter is a metric unit of length equal to one tenth of a meter (1/10 m). Though uncommon in English-speaking countries, it remains a standard SI unit and is used in some scientific and educational contexts.
Like the centimeter and millimeter, the decimeter was defined when France adopted the metric system in 1795, using the SI prefix deci- (from Latin decimus, "tenth").
Decimeters are rarely used in everyday measurement in English-speaking countries but appear in some European technical specifications and in volume conversions (1 cubic decimeter = 1 liter).
Defined in 1795 as part of the original French metric system; remains a recognized SI unit though uncommonly used in commerce.
Foot to Decimeter conversion formula
The relationship between feet and decimeters:
To convert feet to decimeters, multiply the value in feet by 3.048. To reverse, multiply decimeters by 0.3280839895.
How to use this converter
Type a value into the calculator. The result in decimeters updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Decimeter to Foot converter for the reverse direction.
Step-by-step: convert feet to decimeters
- Write down the value in feet (ft).
- Multiply that value by the factor 3.048.
- The product is the equivalent value in decimeters (dm).
- To reverse, multiply the decimeter value by 0.3280839895.
Worked examples
Example 1 — Convert 1 ft to dm:
1 × 3.048 = 3.048 dm
Example 2 — Convert 100 ft to dm:
100 × 3.048 = 304.8 dm
Real-world example — Adult height conversion
A 1.8-foot-tall person measures a value in decimeters that converts the height to the unit favoured by American forms, schools, or driver's licences. This is daily routine for anyone living between metric and imperial systems.
1.8 ft × 3.048 = 5.4864 dm
Real-world example — Fabric purchase length
Two feet of fabric equals a value in decimeters essential for tailors and textile buyers sourcing material from international suppliers that quote in different units.
2 ft × 3.048 = 6.096 dm
Real-world example — Maritime depth conversion
A 10-foot sounding depth converts cleanly into decimeters. Recreational divers and sailors translate between the two units whenever they read legacy charts against modern depth-sounder displays.
10 ft × 3.048 = 30.48 dm
Foot to Decimeter conversion table
Standard reference values for converting feet to decimeters:
| Foot [ft] | Decimeter [dm] |
|---|---|
| 0.01 | 0.03048 |
| 0.1 | 0.3048 |
| 1 | 3.048 |
| 2 | 6.096 |
| 3 | 9.144 |
| 4 | 12.192 |
| 5 | 15.24 |
| 10 | 30.48 |
| 20 | 60.96 |
| 30 | 91.44 |
| 40 | 121.92 |
| 50 | 152.4 |
| 100 | 304.8 |
| 500 | 1524 |
| 1000 | 3048 |
Frequently asked questions
How many decimeters is 1 foot?
How do I convert feet to decimeters?
How do I convert decimeters back to feet?
How many decimeters is 100 feet?
Popular length unit conversions
Convert Foot to other length units
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Metric / SI (18 units)
Imperial / US Customary (26 units)
Nautical (1 units)
Astronomical (9 units)
Atomic / Physics (6 units)
Typographic (3 units)
Sources & references
Conversion factor (1 ft = 3.048 dm) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.