A surveyor's chain is 66 feet.
Chains to Gigameters Converter — ch to Gm
Convert Chain (ch) to Gigameter (Gm) using the exact conversion factor (1 chain = 2.01168e-8 gigameter). See the formula, worked examples, and conversion table.
Chains to Gigameters 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.
Gigameter is 1000000000 meter units.
Result = input x 20.1168 / 1e+9.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Chains to Gigameters
Chain and Gigameter both measure length. Specifically: A surveyor's chain is 66 feet, and gigameter is 1000000000 meter units.
Formula
gigameters = chains × 2.01168e-8
This factor comes from each unit's defined relationship to the category's base unit: 1 chain equals 20.1168 base units, and 1 gigameter equals 1000000000 base units, so dividing one by the other gives the direct chain-to-gigameter factor of 2.01168e-8.
Simple example
1 ch × 2.01168e-8 = 2.01168e-8 Gm
1 chain = 2.01168e-8 gigameters.
Real-world example
10 ch × 2.01168e-8 = 2.01168e-7 Gm
10 chains = 2.01168e-7 gigameters.
Conversion table
| Chain (ch) | Gigameter (Gm) |
|---|---|
| 1 ch | 2.01168e-8 Gm |
| 5 ch | 1.00584e-7 Gm |
| 10 ch | 2.01168e-7 Gm |
| 21.0975 ch | 4.244142e-7 Gm |
| 42.195 ch | 8.488284e-7 Gm |
| 100 ch | 0.0000020117 Gm |
Reverse conversion: Gigameter to Chain
2.01168e-8 Gm × 49709695.38 = 1 ch
2.01168e-8 gigameters = 1 chain.
chains = gigameters × 49709695.379
For a page dedicated to this direction, see Gigameter to Chain.
Understanding the Chain (ch)
A surveyor's chain is 66 feet.
Understanding the Gigameter (Gm)
Gigameter is 1000000000 meter units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gigameters are in 1 chain?
1 chain equals 2.01168e-8 gigameters, using the exact defined conversion factor rather than an estimate.
How do I convert chain to gigameter?
Multiply the chain value by 2.01168e-8. The converter above does this instantly to whatever precision you set.
How do I convert gigameter back to chain?
Use the reverse factor: 1 gigameter equals 49,709,695.38 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 gigameter?
Gigameter (Gm) is a unit of length.
Is the chain to gigameter conversion exact?
Yes. Both chain and gigameter are defined by fixed standards rather than physical artifacts, so the factor of 2.01168e-8 used above is exact to as many digits as you choose to display.