# Hands to Thou (hh to thou)

Source: https://www.unitconvertercalculator.com/length/hands-to-thou/

**1 hh = 4000 thou**

One hand equals exactly 4,000 thou (mils). Since 1 hand = 4 inches and 1 inch = 1,000 thou, multiply 4 by 1,000. The hand measures horse height; the thou measures coatings, wire gauges, and PCB traces. They never overlap in practice.

## Formula

Convert Hands to Thou

## Conversion Table

| Hands (hh) | Thou (thou) |
|---|---|
| 0.01 hh | 40 thou |
| 0.05 hh | 200 thou |
| 0.1 hh | 400 thou |
| 0.25 hh | 1000 thou |
| 0.5 hh | 2000 thou |
| 1 hh | 4000 thou |
| 2 hh | 8000 thou |
| 5 hh | 20000 thou |
| 10 hh | 40000 thou |
| 14 hh | 56000 thou |
| 17 hh | 68000 thou |
| 50 hh | 200000 thou |
| 100 hh | 400000 thou |

## Units

### Hand (hh)

Exactly 4 inches (10.16 cm). The standard unit for measuring the height of horses, measured from the ground to the withers.

### 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.

## Background

A hand is 4,000 thou. A human hair at 3 thou is 0.00075 hands. Horseshoe coating thickness might be 10-20 thou, while the horse wearing the shoe is measured in hands. The scales coexist in farrier work but are never directly compared.

## Good to Know

A farrier works at the intersection of hands and thou: the horse is 16 hands, the horseshoe nail is 50 thou in diameter. Both measurements matter for the same job but at wildly different scales.

## FAQ

### How many thou are in 1 hand?

One hand contains exactly 4,000 thou (mils). Since 1 hand = 4 inches and 1 inch = 1,000 thou.

### How do I convert hands to thou?

Multiply the hand value by 4,000. For example, 16 hands = 64,000 thou.

### Is this conversion used?

Not directly. Farriers might specify horseshoe coating in thou and horse height in hands, but nobody converts between them.

## Non-Frequently Asked Questions

### How thick is horseshoe steel in hands?

Horseshoe steel is about 8 mm = 315 thou thick. In hands, that is 0.0031 hands. The steel between a horse's hoof and the ground is about 3 thousandths of a hand thick. It protects 16 hands of horse using 0.003 hands of metal. Engineering efficiency at its finest.

### Is a horsehair measurable in thou?

A horsehair is about 75 micrometers = 2.95 thou in diameter. So a horsehair is about 3 thou, or 0.003 inches. In hands, a horsehair is 0.00074 hands across. The material used in violin bows is less than 1/1,000 of the unit used to measure the animal it came from.

### Do farriers think in thou or hands?

Farriers think in both. The horse is 16 hands. The horseshoe nail is 50 thou in diameter. The nail bed depth is about 20 thou. The shoe thickness is 315 thou. A farrier works at thou precision on a hands-scale animal. It is precision engineering on a living platform.

## Related Articles

- [Why We Measure: The Deepest Urge in Human Civilisation](https://www.unitconvertercalculator.com/blog/why-we-measure)
- [The Map Is Not the Territory: Why Every Measurement Is Wrong](https://www.unitconvertercalculator.com/blog/the-map-is-not-the-territory)
- [Zero: The Most Dangerous Number in Measurement](https://www.unitconvertercalculator.com/blog/zero-the-most-dangerous-number-in-measurement)
- [The Body as a Ruler: Every Measurement Unit That Came From Us](https://www.unitconvertercalculator.com/blog/the-body-as-a-ruler)
- [The Speed of Everything: How We Measure From Glaciers to Light](https://www.unitconvertercalculator.com/blog/the-speed-of-everything)
- [15 Obscure Measurement Units You've Never Heard Of (But Still Need)](https://www.unitconvertercalculator.com/blog/obscure-measurement-units-guide)
- [When Measurements Go Wrong - Disasters, Blunders and Happy Accidents](https://www.unitconvertercalculator.com/blog/when-measurements-go-wrong)
- [The Surprising Stories Behind Everyday Units of Measurement](https://www.unitconvertercalculator.com/blog/stories-behind-measurement-units)
- [Metric vs. Imperial - The Complete Guide to the World's Two Measurement Systems](https://www.unitconvertercalculator.com/blog/metric-vs-imperial-complete-guide)
- [Length & Distance Conversion Guide - Meters, Feet, Miles & Kilometers](https://www.unitconvertercalculator.com/blog/length-and-distance-guide)

## See Also

- [Thou to Hands](https://www.unitconvertercalculator.com/length/thou-to-hands/)