Inches to Toises (in to toise)

1 inch equals 0.01303208148 toises (rounded).

1 inch = 0.01303208148 toises

How to convert inches to toises

To convert inches to toises, multiply the number of inches by 0.01303208148. The factor is rounded to 10 significant digits. To go the other way, multiply toises by 76.73371299 (rounded).

toises = inches × 0.01303208148

Example: 10 inches = 0.1303208148 toises.

About these units

Inch (in)

US & ImperialCurrent unit

1/12 of a foot. Defined as exactly 25.4 millimeters since 1959, when the US and Commonwealth countries agreed a common international inch.

Latin uncia, meaning one-twelfth, is the root of both inch and ounce, and it passed into Old English as ynce. Roman measurers divided their foot into twelve unciae, and the English inch kept that twelfth. After 1066 an inch was reckoned as three barleycorns, and a 1324 statute attributed to Edward II spelled out the definition as three grains of barley, dry and round, placed end to end lengthwise. For centuries the inch was simply a twelfth of a foot, or a thirty-sixth of a yard, and the US and UK each kept their own copy of the standard yard.

Those copies differed slightly until the 1959 international agreement fixed the yard at exactly 0.9144 meter, which made the inch exactly 25.4 millimeters. The US adopted it in 1959 and the UK ratified it in 1963, effective 1964. Today the inch is still the customary unit in the United States and Canada, and the UK keeps it on road signs. Worldwide it also names display diagonals, wheel rims, tire codes and pipe sizes.

1 inch = 0.0254 meters (exactly).

Sources: Wikipedia: Inch; Wikipedia: Yard; NIST Guide to the SI, Appendix B.8: conversion factors

Toise (toise)

French (Ancien Régime)Historical unit (no longer in standard use)

Six pieds du roi, about 1.949 m. Used to define the length of the meter: the first metric standard was based on a ratio to the toise.

Latin tensa brachia, meaning outstretched arms, is the root of toise, and the unit began as a fathom-like span of a man's reach. Under the Ancien Régime it was fixed at six pieds du roi, 72 pouces or 864 lignes, which equals about 1.949 metres by the 1799 definition.

Its physical standard was an iron bar set into a wall of the Grand Châtelet in Paris, in place before 1394. After the bar bent, a replacement made in 1667 was about half a percent shorter. In 1735 two new geodetic standards were calibrated against it, and one of them, the Toise of Peru, took part in the Spanish-French Geodesic Mission and became the official standard in 1766.

The toise also shaped the metre. The 1799 metre was defined as 443.296 lignes, or 3 pieds and 11.296 lignes of the Toise of Peru, which matches 13,853 parts of 27,000 of a toise. Later French usage varied: from 1812 to 1840 the customary toise was set to exactly 2 metres, and other countries had their own toises, such as about 1.8 metres in Switzerland.

1 toise = 1.94903631 meters (approximately).

Sources: Wikipedia: Toise; Wikipedia: Pied du roi; Wikipedia: Traditional French units of measurement

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