Hides to Square Inches (hide to in²)

1 hide equals 752,716,800 square inches exactly.

1 hide = 752,716,800 square inches

How to convert hides to square inches

To convert hides to square inches, multiply the number of hides by 752,716,800. This factor is exact. To go the other way, multiply square inches by 1.328520899×10⁻⁹ (rounded).

square inches = hides × 752,716,800

Example: 10 hides = 7,527,168,000 square inches.

Approximate value. Standards for the hide varied by place and period, so this converter uses the most commonly cited value. Treat results as estimates, not exact figures.

About these units

Hide (hide)

Medieval EnglishHistorical unit (no longer in standard use)Approximate value

About 120 acres, the land needed to support one household. The Domesday Book assessed England in hides, but the real size varied by region.

Old English hid, tied to a word for family, named land that could support one peasant household. Bede, writing around 731, described territory by the number of families it fed, and the hide grew into the main tax unit of Anglo-Saxon England, assessed in the Domesday survey of 1086 against figures for 1066.

Treating it as an area is risky. Wikipedia calls it a measure of value rather than of size and says the old idea of a fixed 120 acres cannot be sustained, though Cambridgeshire entries do reckon a hide as 120 geld acres, which were units of assessment and not ground area. Four virgates made a hide in most counties, but Sussex used eight, and Kent counted in sulungs.

The figure used here, about 120 acres or roughly 485,600 square meters, is the traditional round number. Northern and eastern counties under Danish law used the carucate instead, nominally the same size, divided into eight oxgangs.

1 hide = 485,622.7707 square meters (approximately).

Sources: Wikipedia: Hide (unit); Wikipedia: Carucate; Domesday Book Online: Glossary

Square Inch (in²)

US & ImperialCurrent unit

A square one inch on a side, exactly 6.4516 cm². Used for small parts and for pressure (pounds per square inch).

Latin uncia, one twelfth, gave English the inch, which Old English borrowed as ynce. A statute of Edward II in 1324 defined it as three barleycorns, dry and round, set end to end, and the barleycorn remained the base for centuries after 1066. The modern square inch rests on a 20th-century agreement: the United States adopted a yard of exactly 0.9144 meter on 1 July 1959, the United Kingdom followed effective 1 January 1964, and the inch became exactly 25.4 mm.

Squaring that gives exactly 6.4516 cm² for one square inch, and one square meter is about 1,550 of them. Its best-known descendant is the pound per square inch, psi, the pressure unit still used for American tires and air tanks: atmospheric pressure at sea level is about 14.7 psi, a car tire is typically inflated to around 32 psi above the surrounding air, and one psi is about 6.895 kilopascals. The square inch itself is common in the US and UK for small parts and printed material.

1 square inch = 0.00064516 square meters (exactly).

Sources: Wikipedia: Square inch; Wikipedia: Inch; Wikipedia: Pounds per square inch

Related conversions

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