# Millimeters to Hands (mm to hh)

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

**1 mm = 0.0098425196850394 hh**

One millimeter equals approximately 0.009843 hands, or about 1/101.6 of a hand. A hand (101.6 mm) contains exactly 101.6 millimeters. This conversion connects equestrian equipment (specified in mm) with horse height (measured in hands).

## Formula

Convert Millimeters to Hands

## Conversion Table

| Millimeters (mm) | Hands (hh) |
|---|---|
| 1 mm | 0.0098425196850394 hh |
| 2 mm | 0.019685039370079 hh |
| 5 mm | 0.049212598425197 hh |
| 10 mm | 0.098425196850394 hh |
| 25 mm | 0.24606299212598 hh |
| 50 mm | 0.49212598425197 hh |
| 100 mm | 0.98425196850394 hh |
| 101.6 mm | 1 hh |
| 200 mm | 1.9685039370079 hh |
| 500 mm | 4.9212598425197 hh |
| 1000 mm | 9.8425196850394 hh |
| 5000 mm | 49.212598425197 hh |

## Units

### Millimeter (mm)

A metric unit of length equal to one thousandth of a meter. Used in engineering, manufacturing, and precise measurements.

### Hand (hh)

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

## Background

A hand is 101.6 mm. A saddle width of 440 mm is 4.33 hands. A horseshoe at 125 mm wide is 1.23 hands. Equestrian equipment specs use millimeters while the horse wearing them is measured in hands.

## Good to Know

Equestrian equipment catalogs are a bilingual document: saddle widths in mm, horse heights in hands. Every purchase requires translation between these two units. A '17-inch saddle for a 16-hand horse' means '432 mm seat for a 1,626 mm animal.' The horse world mixes units without apology.

## FAQ

### How many hands is 1 millimeter?

One millimeter equals approximately 0.009843 hands (about 1/101.6 of a hand).

### How many millimeters are in 1 hand?

One hand contains exactly 101.6 mm (4 inches x 25.4 mm/inch).

### When is this conversion needed?

When fitting equestrian equipment specified in mm (saddles, bits, shoes) to horses measured in hands.

## Non-Frequently Asked Questions

### Is a hand really about 100 mm?

Almost. 1 hand = 101.6 mm. The difference from 100 mm (1 decimeter) is only 1.6 mm. Your palm width and one-tenth of a meter accidentally match to within the thickness of a credit card. Human body parts are coincidentally metric.

### How many mm of growth makes a pony become a horse?

The FEI pony boundary is 14.2 hands (1,473.2 mm). Anything above is a horse. So a pony at 1,473 mm needs to grow just 0.2 mm (about 2 hair widths) to become a horse. Equestrian classification comes down to fractions of millimeters.

### How many millimeters of horseshoe protects each hand of horse?

A horseshoe is about 8-10 mm thick. A 16-hand horse (1,625.6 mm tall at withers) stands on 8-10 mm of iron. The shoe is 0.5-0.6% of the horse's height. Your entire equestrian investment stands on less than 1% of the horse's measurement.

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## See Also

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