How many rods are in 1 chain?

One chain equals exactly 4 rods (also called perches or poles). This is an exact defining relationship: 1 chain = 4 rods = 66 feet.

How do I convert chains to rods?

Multiply the number of chains by 4. For example, 15 chains = 60 rods. The conversion is exact with no rounding needed.

Why does 1 chain equal 4 rods?

The chain (66 feet) was designed as 4 rods (4 x 16.5 feet) to maintain compatibility with existing rod-based land measurements. The rod was already established when Gunter introduced his chain around 1620.

Chains to Rods (ch to rd) Converter

1 ch = 4 rd

1 Chain equals 4 Rods (1 ch = 4 rd). Convert Chains to Rods with formula, table, and examples.

One chain equals exactly 4 rods (perches/poles). This is a fundamental relationship in the English land measurement system: the chain was deliberately designed as 4 rods. Both units come from the same surveying tradition, and this conversion appears frequently in historical property descriptions.

How to Convert Chains to Rods

rd = ch × 4

Multiply the value in Chains by 4

Take your value in Chains
Multiply by 4
Read the result in Rods

Common Chains to Rods Conversions

Chains (ch)	Rods (rd)	Status
0.25 ch	1 rd
0.5 ch	2 rd
1 ch	4 rd
2 ch	8 rd
5 ch	20 rd
10 ch	40 rd
20 ch	80 rd
40 ch	160 rd
80 ch	320 rd
100 ch	400 rd
200 ch	800 rd
500 ch	2,000 rd
1,000 ch	4,000 rd

Good to Know About Chains to Rods Conversion

The chain-rod relationship (4:1) is one of the few clean ratios in the imperial system. Gunter designed his chain to be compatible with the existing rod, just as he designed it to create clean acre calculations. The chain was a masterpiece of backward compatibility.

Chains to Rods: What You Need to Know

Since 1 rod = 16.5 feet and 1 chain = 66 feet, the ratio is exactly 66/16.5 = 4. A furlong (10 chains) equals 40 rods. One mile (80 chains) equals 320 rods. Old deeds often mix chains and rods in the same boundary description, making this conversion practically important for historical land research.

What is a Chain? ch

Exactly 66 feet or 4 rods (20.1168 m). Invented by Edmund Gunter for land surveying. 80 chains make one mile. Still used in US public land surveys.

Imperial land surveying US public land

Learn more about Chain →

What is a Rod? rd

Exactly 16.5 feet or 5.5 yards (5.0292 m). Also called a perch or pole. Historically used in land surveying.

Imperial land surveying historical

Learn more about Rod →

Going the other way? Use our Rods to Chains converter.

Chains to Rods FAQ

One chain equals exactly 4 rods (also called perches or poles). This is an exact defining relationship: 1 chain = 4 rods = 66 feet.
Multiply the number of chains by 4. For example, 15 chains = 60 rods. The conversion is exact with no rounding needed.
The chain (66 feet) was designed as 4 rods (4 x 16.5 feet) to maintain compatibility with existing rod-based land measurements. The rod was already established when Gunter introduced his chain around 1620.

Non-Frequently Asked Questions About Chains to Rods

Questions nobody should ask - but someone did.

A chain (66 feet / 4 rods) is four times longer than a rod (16.5 feet). But a rod (also called perch or pole) is a solid stick, while a chain is flexible metal links. In a hypothetical unit fight, the rod has better structural integrity but shorter reach. We do not endorse unit violence.
Because 4 x 16.5 feet = 66 feet = 1 chain. Gunter designed the chain as 4 rods to make area calculation simple: 1 rod x 1 furlong = 1 rood (quarter acre), 1 chain x 1 furlong = 1 acre. Everything connects through the rod.
No. A fishing rod is for catching fish. A surveying rod (perch/pole) is exactly 16.5 feet and measures land. One rod feeds you; the other tells you where to farm. Both are useful sticks but in very different ways.