Pounds to Stones Converter

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Convert pounds to stones using the UK relation 14 lb = 1 stone, so 1 lb ≈ 0.0714 stone. A 168-lb adult is exactly 12 stone; a 140-lb adult is 10 stone. Use this when US-style pound figures need to be reported in the British everyday body-weight format. The stone is purely a body-weight unit — never used for scientific or commercial weighing. Browser-local.

Pound (lb)
Stone (st)

Pound (lb) → Stone (st)

Quick reference table

Pound (lb)Stone (st)
1 lb0.0714 stone
2 lb0.1429 stone
5 lb0.3571 stone
10 lb0.7143 stone
25 lb1.7857 stone
50 lb3.5714 stone
100 lb7.1429 stone

Glossary

Pound (lb)

A pound (avoirdupois) is exactly 0.45359237 kg by the international 1959 yard-and-pound agreement. It is the everyday US/UK unit for body weight, groceries, gym plates and shipping. Sixteen ounces make one pound; fourteen pounds make one stone (UK only). The symbol "lb" comes from Latin "libra".

Stone (st)

A stone is exactly 14 pounds or 6.35029318 kg, used in the United Kingdom and Ireland for personal body weight (e.g. "11 st 4 lb"). It is rarely used in the United States, where pounds are reported directly. The stone is not used in scientific or commercial weighing — only in everyday colloquial body-weight reporting.

Metric system (SI)

The metric system is a decimal system of measurement built around the kilogram for mass, the meter for length and the second for time, with multiples and submultiples expressed as powers of ten (milligram, gram, tonne). Adopted in France in 1799 and codified internationally as the International System of Units (SI) in 1960, it is now the official system in nearly every country and the standard in science.

Imperial / US Customary system

The imperial system is the historical English system of weights and measures whose mass units are the ounce, pound, stone and ton (16 oz = 1 lb, 14 lb = 1 stone, 2,000 lb = 1 US short ton). Codified by the British Weights and Measures Act of 1824 and aligned with US Customary by the 1959 international yard-and-pound agreement (1 lb = 0.45359237 kg exactly), it is still used in the United States and the United Kingdom for everyday weights.

Related tools

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