A stone is a traditional British imperial unit of mass equal to 14 pounds (approximately 6.35 kilograms), still widely used in the UK and Ireland for measuring body weight.

Historical Roots

The stone dates back centuries in England, originally varying by commodity—like wool or cheese—before standardization at 14 pounds in 1824. It persists today despite metric adoption, especially for personal weigh-ins, as Brits often say "I weigh 10 stone" instead of kilograms.

"One stone is officially defined as 14 pounds or 6.35 kg."

Everyday Conversions

  • 1 stone = 14 lb = 6.35 kg
  • 10 stone = 140 lb ≈ 63.5 kg (common adult range)
  • Long ton = 160 stone (historical trade use)

This chart shows quick equivalents:

Stones| Pounds| Kilograms
---|---|---
7| 98| 44.5
10| 140| 63.5
12| 168| 76.2
15| 210| 95.3

Why Still Popular?

Forum chatter reveals cultural stubbornness: Brits love it for simplicity in fitness tracking, joking about converting lbs to kg for gym plates. One MyFitnessPal user quipped, "Leave us alone with our Stones. We like them!" Meanwhile, Americans scratch heads at "stone" posts. No major 2026 trends shifting this—it's steady in wellness apps.

Other Contexts

Rarely, "stone measurement" nods to literal rock sizing in construction (volume/weight via calipers), but queries overwhelmingly mean the weight unit. Vendors in some regions still use it informally for produce.

TL;DR : Stone = 14 lbs (6.35 kg), a quirky UK weight staple.

Information gathered from public forums or data available on the internet and portrayed here.