Feet to Chain Converter
Length · unit-converter
Convert Feet to Chain with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use SI-based definitions (international yard, nautical mile, etc.).
Calculator
From: Feet (ft)
To: Chain (chain)
About Feet
Feet are imperial and US customary units of length; each is exactly 0.3048 meters. Twelve inches make one feet; feet are common in construction and human-scale dimensions.
About Chain
The chain is a surveying unit equal to 66 feet (20.1168 meters) exactly. It appears in land measurement and legacy civil engineering records.
How to convert feet to chains
1 feet is equal to 0.01515151515152 chain:
1 ft = (0.3048 m ÷ 20.1168 m) chain = 0.01515151515152 chain
Each feet is defined as 0.3048 m and each chain as 20.1168 m, so one ft equals 0.3048 ÷ 20.1168 chain = 0.01515151515152 chain.
Let d(ft) be the numeric value of the same length measured in Feet (ft), and d(chain) the value in Chain (chain). Then:
d(chain) = d(ft) × (0.3048 / 20.1168)
Equivalently, divide by how many ft fit into one chain (meters per chain divided by meters per ft):
d(chain) = d(ft) ÷ 66
Or: chain = feet ÷ 66
Examples
Example #1: Convert 20 ft to chain
20 ft = 20 ft × (0.3048/20.1168) chain = 0.303030303 chain
20 ft = 20 ft ÷ 66 = 0.303030303 chain
Example #2: Convert 50 ft to chain
50 ft = 50 ft × (0.3048/20.1168) chain = 0.7575757576 chain
50 ft = 50 ft ÷ 66 = 0.7575757576 chain
Summary
To convert Feet to Chain, multiply the value in ft by the ratio of meters per ft divided by meters per chain. Equivalently: value_chain = value_ft × (0.3048 / 20.1168). Numerically, 1 ft equals 0.015151515151515152 chain.
Relationship context
Both units belong to US customary / imperial length. Conversions often use simple ratios (for example inches and feet), while miles relate to yards and feet through fixed definitions. The numeric factor used here is traceable to the international inch (0.0254 m) and related definitions.
Conversion tables
| Feet (ft) | Chain (chain) |
|---|---|
| 0.1 | 0.0015151515 |
| 1 | 0.0151515152 |
| 2 | 0.0303030303 |
| 3 | 0.0454545455 |
| 4 | 0.0606060606 |
| 5 | 0.0757575758 |
| 6 | 0.0909090909 |
| 7 | 0.1060606061 |
| 8 | 0.1212121212 |
| 9 | 0.1363636364 |
| Feet (ft) | Chain (chain) |
|---|---|
| 10 | 0.1515151515 |
| 20 | 0.303030303 |
| 30 | 0.4545454545 |
| 40 | 0.6060606061 |
| 50 | 0.7575757576 |
| 60 | 0.9090909091 |
| 70 | 1.0606060606 |
| 80 | 1.2121212121 |
| 90 | 1.3636363636 |
| 100 | 1.5151515151 |