How many nanometers is 1 thou?

One thou equals exactly 25,400 nm.

How many thou is 1 nanometer?

One nanometer equals approximately 3.937 x 10-5 thou.

When is thou-to-nm used?

When semiconductor packages (thou specs for pin pitch, lead width) contain nm-scale transistors. A chip wire bond (1-2 thou diameter) connects to 3 nm transistors.

Thou to Nanometers (thou to nm) Converter

1 thou = 25,400 nm

1 Thou equals 25,400 Nanometers (1 thou = 25,400 nm). Convert Thou to Nanometers with formula, table, and examples.

One thou equals exactly 25,400 nanometers. The thou measures American precision machining; the nanometer measures semiconductor fabrication. A single thou contains enough space for about 8,467 state-of-the-art (3 nm) transistors.

How to Convert Thou to Nanometers

nm = thou × 25,400

Multiply the value in Thou by 25,400

Take your value in Thou
Multiply by 25,400
Read the result in Nanometers

Common Thou to Nanometers Conversions

Thou (thou)	Nanometers (nm)	Status
0.01 thou	254 nm
0.05 thou	1,270 nm
0.1 thou	2,540 nm
0.5 thou	12,700 nm
1 thou	25,400 nm
2 thou	50,800 nm
5 thou	127,000 nm
10 thou	254,000 nm
50 thou	1,270,000 nm
100 thou	2,540,000 nm
500 thou	12,700,000 nm
1,000 thou	25,400,000 nm

Good to Know About Thou to Nanometers Conversion

The thou was the precision frontier until the 1960s. The nanometer replaced it as technology shrank. But the thou survives in mechanical engineering while the nm rules electronics. They coexist because machining metal and etching silicon need different precision scales. The thou machines the package; the nm defines the chip inside.

Thou to Nanometers: What You Need to Know

1 thou = 25,400 nm. A 3 nm transistor is 0.000118 thou. The thou was the precision frontier until chips pushed measurement to nm. A 1-thou tolerance was cutting-edge in the 1950s; today, chip features are 1/8,467th of a thou.

What is a Thou? thou

One thousandth of an inch (0.0254 mm). Also called a mil in the US. Used in engineering, manufacturing, and for measuring thin materials like plastic film.

Imperial engineering plastic film thickness wire gauges

Learn more about Thou →

What is a Nanometer? nm

One billionth of a meter. Used to measure wavelengths of light, semiconductor chip features, and molecular structures.

Metric semiconductor manufacturing optics nanotechnology

Learn more about Nanometer →

Going the other way? Use our Nanometers to Thou converter.

Thou to Nanometers FAQ

One thou equals exactly 25,400 nm.
One nanometer equals approximately 3.937 x 10^-5 thou.
When semiconductor packages (thou specs for pin pitch, lead width) contain nm-scale transistors. A chip wire bond (1-2 thou diameter) connects to 3 nm transistors.

Non-Frequently Asked Questions About Thou to Nanometers

Questions nobody should ask - but someone did.

A chip package pin pitch is about 20-50 thou (0.5-1.27 mm). The die inside has 3 nm features. The ratio is about 6,700-16,700 nm features per thou of pin pitch. The package is a thou-scale house for nm-scale residents. Chip packaging is a cross-scale housing problem.
Yes. British, Canadian, and Australian machinists also use thou. But most metric-country machinists use micrometers (um) instead. 1 thou = 25.4 um. The thou is an English-speaking precision unit, not exclusively American. But America uses it the most stubbornly.
They already were - in the 1960s. Early integrated circuits had feature sizes of about 25,000 nm (1 thou). The industry then spent 60 years shrinking from 1 thou to 3 nm. Going back to 1-thou transistors would be like going back to rotary phones. Progress goes one direction.