none. But if you mean fathom, depth of water used mostly in sailing, 1 fathom is 6 feet, so 6 x 12 x 2.54 / 100 = 1.83 meters
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10 meters
Umm, you need one million meters to make one million meters.
One fermi is one femtometer, which is equal to 10-15 meters, or 0.000,000,000,000,001 meters.
.0000000039 meters in one nanometer.
Around 10 meters.