# Inches to Fathoms (in to ftm)

Source: https://www.unitconvertercalculator.com/length/inches-to-fathoms/

**1 in = 0.013888888888889 ftm**

One inch equals exactly 1/72 of a fathom, or approximately 0.01389 fathoms. Since 1 fathom = 6 feet = 72 inches, the ratio is clean. The inch measures everyday objects; the fathom measures ocean depth. Both are English units from the foot-based system.

## Formula

Convert Inches to Fathoms

## Conversion Table

| Inches (in) | Fathoms (ftm) |
|---|---|
| 1 in | 0.013888888888889 ftm |
| 5 in | 0.069444444444444 ftm |
| 10 in | 0.13888888888889 ftm |
| 12 in | 0.16666666666667 ftm |
| 24 in | 0.33333333333333 ftm |
| 36 in | 0.5 ftm |
| 48 in | 0.66666666666667 ftm |
| 72 in | 1 ftm |
| 100 in | 1.3888888888889 ftm |
| 200 in | 2.7777777777778 ftm |
| 500 in | 6.9444444444444 ftm |
| 1000 in | 13.888888888889 ftm |
| 5000 in | 69.444444444444 ftm |

## Units

### Inch (in)

An imperial unit of length equal to exactly 2.54 centimeters. Commonly used in the US and UK for screen sizes, body measurements, and construction.

### Fathom (ftm)

Exactly 6 feet (1.8288 m). Traditionally used to measure water depth in nautical contexts. Originally based on the span of outstretched arms.

## Background

A fathom contains exactly 72 inches. A 12-inch (1 foot) measurement is 1/6 of a fathom. A recreational dive limit of 130 feet (1,560 inches) is about 21.67 fathoms. Converting between inches and fathoms is needed when interpreting nautical equipment specifications alongside depth charts.

## Good to Know

On a ship, anchor chain links are measured in inches. Deployed chain length is measured in fathoms. Both describe the same chain at different scales: the link's width in inches, the chain's length in fathoms.

## FAQ

### How many fathoms is 1 inch?

One inch equals exactly 1/72 of a fathom (approximately 0.01389 fathoms).

### How many inches are in 1 fathom?

One fathom contains exactly 72 inches (6 feet x 12 inches/foot).

### When would I convert inches to fathoms?

When reading nautical charts that show depth in fathoms alongside equipment specifications in inches, such as anchor chain diameter or mooring line width.

## Non-Frequently Asked Questions

### How deep is a bathtub in fathoms?

A bathtub is about 16 inches (40 cm) deep, which is 0.222 fathoms. You bathe in less than a quarter fathom of water. Shakespeare's 'full fathom five' is 27 times deeper than your bath. Your bath is not dramatic enough for poetry.

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## See Also

- [Fathoms to Inches](https://www.unitconvertercalculator.com/length/fathoms-to-inches/)