To convert chains to nautical miles, multiply by 0.01086220302.
The calculation uses 1 ch = 0.01086220302 nmi. Results are displayed to at most 10 significant digits. Definitions can be exact while a displayed decimal is rounded. Match the displayed precision to your original measurement.
The formula
ch- Input unit: chains
nmi- Output unit: nautical miles
How to use this calculator
- Enter a value in ch.
- Multiply by the stored conversion factor.
- Read the result in nmi; divide by the same factor to convert back.
Worked examples
Worked conversion
1 ch × 0.01086220302 ≈ 0.01086220302 nmi.
Reverse conversion
0.01086220302 nmi ÷ 0.01086220302 ≈ 1 ch. Rounding intermediate values can change the last displayed digit.
Frequently asked questions
What factor does this converter use?
It uses 0.01086220302 nmi per ch.
Why can another converter show a slightly different answer?
Check the unit convention first (such as US versus Imperial or decimal versus binary), then compare rounding. Measurement uncertainty is separate from the unit conversion.
ch to nmi table
| ch | nmi (rounded) |
|---|---|
| 0 | 0 |
| 1 | 0.01086220302 |
| 2 | 0.02172440605 |
| 5 | 0.05431101512 |
| 10 | 0.1086220302 |
| 100 | 1.086220302 |