A surveyor's chain is 66 feet.
Chains to Megameters Converter — ch to Mm
Convert Chain (ch) to Megameter (Mm) using the exact conversion factor (1 chain = 0.0000201168 megameter). See the formula, worked examples, and conversion table.
Chains to Megameters 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.
Megameter is 1000000 meter units.
Result = input x 20.1168 / 1e+6.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Chains to Megameters
Chain and Megameter both measure length. Specifically: A surveyor's chain is 66 feet, and megameter is 1000000 meter units.
Formula
megameters = chains × 0.0000201168
This factor comes from each unit's defined relationship to the category's base unit: 1 chain equals 20.1168 base units, and 1 megameter equals 1000000 base units, so dividing one by the other gives the direct chain-to-megameter factor of 0.0000201168.
Simple example
1 ch × 0.0000201168 = 0.0000201168 Mm
1 chain = 0.0000201168 megameters.
Real-world example
10 ch × 0.0000201168 = 0.000201168 Mm
10 chains = 0.000201168 megameters.
Conversion table
| Chain (ch) | Megameter (Mm) |
|---|---|
| 1 ch | 0.0000201168 Mm |
| 5 ch | 0.000100584 Mm |
| 10 ch | 0.000201168 Mm |
| 21.0975 ch | 0.0004244142 Mm |
| 42.195 ch | 0.0008488284 Mm |
| 100 ch | 0.00201168 Mm |
Reverse conversion: Megameter to Chain
0.0000201168 Mm × 49709.69538 = 1 ch
0.0000201168 megameters = 1 chain.
chains = megameters × 49709.695379
For a page dedicated to this direction, see Megameter to Chain.
Understanding the Chain (ch)
A surveyor's chain is 66 feet.
Understanding the Megameter (Mm)
Megameter is 1000000 meter units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many megameters are in 1 chain?
1 chain equals 0.0000201168 megameters, using the exact defined conversion factor rather than an estimate.
How do I convert chain to megameter?
Multiply the chain value by 0.0000201168. The converter above does this instantly to whatever precision you set.
How do I convert megameter back to chain?
Use the reverse factor: 1 megameter equals 49,709.69538 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 megameter?
Megameter (Mm) is a unit of length.
Is the chain to megameter conversion exact?
Yes. Both chain and megameter are defined by fixed standards rather than physical artifacts, so the factor of 0.0000201168 used above is exact to as many digits as you choose to display.