A surveyor's chain is 66 feet.
Chains to Points Converter — ch to pt
Convert Chain (ch) to Point (pt) using the exact conversion factor (1 chain = 57,024 point). See the formula, worked examples, and conversion table.
Chains to Points converter
Converter
Length Converter
Convert SI, imperial, US customary, astronomical, scientific, and historical length units.
Context values
Some unit families need one extra value for a physically accurate result.
A desktop publishing point is 1/72 inch.
Result = input x 20.1168 / 0.0003527777778.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Chains to Points
Chain and Point both measure length. Specifically: A surveyor's chain is 66 feet, and a desktop publishing point is 1/72 inch.
Formula
points = chains × 57023.9999964
This factor comes from each unit's defined relationship to the category's base unit: 1 chain equals 20.1168 base units, and 1 point equals 0.0003527777778 base units, so dividing one by the other gives the direct chain-to-point factor of 57023.9999964.
Simple example
1 ch × 57024 = 57,024 pt
1 chain = 57,024 points.
Real-world example
10 ch × 57024 = 570,240 pt
10 chains = 570,240 points.
Conversion table
| Chain (ch) | Point (pt) |
|---|---|
| 1 ch | 57,024 pt |
| 5 ch | 285,120 pt |
| 10 ch | 570,240 pt |
| 21.0975 ch | 1,203,063.84 pt |
| 42.195 ch | 2,406,127.68 pt |
| 100 ch | 5,702,400 pt |
Reverse conversion: Point to Chain
1 pt × 0.00001753647587 = 0.0000175365 ch
1 point = 0.0000175365 chains.
chains = points × 0.0000175364758709
For a page dedicated to this direction, see Point to Chain.
Understanding the Chain (ch)
A surveyor's chain is 66 feet.
Understanding the Point (pt)
A desktop publishing point is 1/72 inch.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many points are in 1 chain?
1 chain equals 57,024 points, using the exact defined conversion factor rather than an estimate.
How do I convert chain to point?
Multiply the chain value by 57024. The converter above does this instantly to whatever precision you set.
How do I convert point back to chain?
Use the reverse factor: 1 point equals 0.0000175365 chains. You can also use the swap control in the converter above to flip the direction instantly.
What is a chain?
Chain (ch) is a unit of length.
What is a point?
Point (pt) is a unit of length.
Is the chain to point conversion exact?
Yes. Both chain and point are defined by fixed standards rather than physical artifacts, so the factor of 57024 used above is exact to as many digits as you choose to display.