A surveyor's chain is 66 feet.
Chains to Exameters Converter — ch to Em
Convert Chain (ch) to Exameter (Em) using the exact conversion factor (1 chain = 2.01168e-17 exameter). See the formula, worked examples, and conversion table.
Chains to Exameters 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.
Exameter is 1000000000000000000 meter units.
Result = input x 20.1168 / 1e+18.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Chains to Exameters
Chain and Exameter both measure length. Specifically: A surveyor's chain is 66 feet, and exameter is 1000000000000000000 meter units.
Formula
exameters = chains × 2.01168e-17
This factor comes from each unit's defined relationship to the category's base unit: 1 chain equals 20.1168 base units, and 1 exameter equals 1e+18 base units, so dividing one by the other gives the direct chain-to-exameter factor of 2.01168e-17.
Simple example
1 ch × 2.01168e-17 = 2.01168e-17 Em
1 chain = 2.01168e-17 exameters.
Real-world example
10 ch × 2.01168e-17 = 2.01168e-16 Em
10 chains = 2.01168e-16 exameters.
Conversion table
| Chain (ch) | Exameter (Em) |
|---|---|
| 1 ch | 2.01168e-17 Em |
| 5 ch | 1.00584e-16 Em |
| 10 ch | 2.01168e-16 Em |
| 21.0975 ch | 4.244142e-16 Em |
| 42.195 ch | 8.488284e-16 Em |
| 100 ch | 2.01168e-15 Em |
Reverse conversion: Exameter to Chain
2.01168e-17 Em × 4.97097e+16 = 1 ch
2.01168e-17 exameters = 1 chain.
chains = exameters × 4.97097e+16
For a page dedicated to this direction, see Exameter to Chain.
Understanding the Chain (ch)
A surveyor's chain is 66 feet.
Understanding the Exameter (Em)
Exameter is 1000000000000000000 meter units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many exameters are in 1 chain?
1 chain equals 2.01168e-17 exameters, using the exact defined conversion factor rather than an estimate.
How do I convert chain to exameter?
Multiply the chain value by 2.01168e-17. The converter above does this instantly to whatever precision you set.
How do I convert exameter back to chain?
Use the reverse factor: 1 exameter equals 4.97097e+16 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 exameter?
Exameter (Em) is a unit of length.
Is the chain to exameter conversion exact?
Yes. Both chain and exameter are defined by fixed standards rather than physical artifacts, so the factor of 2.01168e-17 used above is exact to as many digits as you choose to display.