Chain to Nautical Mile Converter

Length Converter

31 units available

Decimals:

From

To

0.010862

1 ch = 0.010862 nmi

Formula:

nmi = ch × 0.010862203

With your value: 1 ch = 0.0108622 nmi

How big is that?

Everyday references on a logarithmic scale, all expressed in chain so you can sanity-check the result.

Standard door height (1/10 your value)0.0994 ch

London double-decker bus (1/1.8 your value)0.547 ch

Your value1.00 ch

Olympic pool (2.5× your value)2.49 ch

Football pitch (length) (5.2× your value)5.22 ch

Eiffel Tower (16× your value)16.4 ch

Other Chain to Nautical Mile conversions

2 ch to nmi 3 ch to nmi 4 ch to nmi 5 ch to nmi 6 ch to nmi 7 ch to nmi 8 ch to nmi

Chain to Nautical Mile Conversion Table

Chain (ch)	Nautical Mile (nmi)
0.5	0.005431
1	0.010862
2	0.021724
5	0.054311
10	0.108622
15	0.162933
20	0.217244
25	0.271555
50	0.54311
100	1.08622
250	2.715551
500	5.431102
1000	10.862203

Nautical Mile to Chain Conversion Table

Nautical Mile (nmi)	Chain (ch)
0.5	46.031178
1	92.062356
2	184.124712
5	460.311779
10	920.623558
15	1,380.935338
20	1,841.247117
25	2,301.558896
50	4,603.117792
100	9,206.235584
250	23,015.58896
500	46,031.177921
1000	92,062.355842

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Chain (ch)

Length

Exact conversion

Traceable to the metre, defined by fixing the speed of light in vacuum at 299 792 458 m/s. Imperial lengths derive from the 1959 international yard (0.9144 m exactly).

Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)

Bureau International des Poids et Mesures · Reviewed 2026-07-01

Nautical Mile (nmi)

Length

Conventional value

1 international nautical mile = 1852 m exactly, adopted by the First International Extraordinary Hydrographic Conference (1929).

Source: Units accepted for use with the SI, SI Brochure Table 8

Bureau International des Poids et Mesures · Reviewed 2026-07-01

How to Convert Chain to Nautical Mile

To convert from Chain (ch) to Nautical Mile (nmi), multiply the value by 0.010862203.

Formula: nmi = ch × 0.010862203

Reverse: ch = nmi × 92.0623558419

Step-by-Step Example

Start with your value in Chain. For example: 5 ch
Multiply by the conversion factor: 5 x 0.010862203
The result is: 0.054311 nmi

About Chain

Gunter's chain equals 66 feet (20.1168 m) and underpins the US Public Land Survey System: 10 square chains make one acre.

Common uses: land surveying, cadastral records, cricket pitch length.

About Nautical Mile

The nautical mile equals 1,852 meters and is used primarily in aviation and maritime navigation.

Fun Fact: One nautical mile corresponds to one minute of latitude on the Earth's surface.

Common uses: navigation, aviation, maritime.

Frequently Asked Questions

How many Nautical Mile are in 1 Chain?

There are exactly 0.010862203 Nautical Mile in 1 Chain. This means the conversion factor from Chain to Nautical Mile is 0.010862203.

What is the formula to convert Chain to Nautical Mile?

The formula to convert Chain to Nautical Mile is: nmi = ch × 0.010862203. For example, to convert 10 Chain to Nautical Mile, you would multiply 10 by 0.010862203.

What is a Chain?