Feet to Decimeters
Type a value in either box to convert between feet and decimeters. The factor is 3.048.
| Feet | Decimeters |
|---|---|
| 1 ft | 3.048 dm |
| 2 ft | 6.096 dm |
| 3 ft | 9.144 dm |
| 5 ft | 15.24 dm |
| 10 ft | 30.48 dm |
| 25 ft | 76.2 dm |
| 50 ft | 152.4 dm |
| 100 ft | 304.8 dm |
How to use
- Enter a value in the Feet field.
- The Decimeters figure appears immediately — no button to press.
- Typing in the Decimeters field converts back to Feet the same way.
- Use the reference table for the values that come up most often.
Feet to Decimeters formula
The factor from feet to decimeters is 3.048.
dm = ft × 3.048
Put another way, one foot is exactly 381/125 decimeters.
Why this factor: the foot and the decimeter are both defined against the meter, so dividing one definition by the other gives 3.048 directly. Both definitions are set out in full below.
To go the other way, divide by 3.048 — or use the Decimeters to Feet converter, which is the same calculation reversed.
Worked example
Take 100 ft and multiply by the factor 3.048: the result is 304.8 dm.
100 ft × 3.048 = 304.8 dm
The converter above does this for any value you type, in either direction.
What is a foot?
A foot is twelve inches, the primary unit for human-scale dimensions in the US.
Definition: Exactly 0.3048 meter since 1959 — one third of the international yard.
Where it is used: Building heights, room dimensions, aviation altitude worldwide, and personal height in the US and UK.
Worth knowing: The US survey foot, very slightly longer, was used in land surveying until it was officially retired at the end of 2022.
What is a decimeter?
A decimeter is one tenth of a meter — 10 centimeters.
Definition: Exactly 0.1 meter by SI prefix definition.
Where it is used: Rare in everyday speech, but it matters because a cubic decimeter is exactly one liter.
Worth knowing: The decimeter's real importance is volumetric: 1 dm³ = 1 L exactly, which is where the liter comes from.
Feet vs Decimeters
The foot is an imperial unit while the decimeter is a metric unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many decimeters are in a foot?
One foot equals 3.048 decimeters.
What is the formula to convert feet to decimeters?
Multiply the number of feet by 3.048. To reverse it, divide by 3.048 instead.
How do I convert decimeters back to feet?
Divide by 3.048, which is the same as multiplying by 0.32808399.
How many decimeters are in 10 feet?
10 ft works out to 30.48 dm.
Is there anything to watch out for with feet?
The US survey foot, very slightly longer, was used in land surveying until it was officially retired at the end of 2022.
How is the foot defined?
Exactly 0.3048 meter since 1959 — one third of the international yard.