Convert Fathoms to Thou
Convert Fathoms (ftm) to Thou (th) instantly and accurately.
Conversion Formula
th = ftm × 72000
About Fathoms
A fathom (ftm) is equal to 6 feet or 1.8288 meters, traditionally based on the span of a man's outstretched arms. This unit has been used for centuries in maritime navigation to measure water depth and rope or cable lengths. While largely replaced by meters in modern nautical charts, fathoms remain in use by sailors and in naval traditions. The Mariana Trench, Earth's deepest point, reaches about 6,000 fathoms. The term 'to fathom' meaning 'to understand' derives from this nautical unit.
About Thou
A thou (also called mil) is one thousandth of an inch, equal to 0.0254 millimeters or 25.4 micrometers. This unit is commonly used in engineering and manufacturing in countries that use imperial measurements, particularly for specifying tolerances, wire gauges, and thin material thicknesses. For example, a standard plastic bag might be 1-2 thou thick, a sheet of paper is about 4 thou, and precision machined parts often have tolerances measured in thou. Electronic circuit board copper traces are typically 1.4 thou thick.
Quick Reference Table
| Fathoms (ftm) | Thou (th) |
|---|---|
| 1 ftm | 72000 th |
| 2 ftm | 144000 th |
| 5 ftm | 360000 th |
| 10 ftm | 720000 th |
| 25 ftm | 1800000 th |
| 50 ftm | 3600000 th |
| 100 ftm | 7200000 th |