Convert Pound (lb) (lb) to Stone (st) (st)
Category: Mass
1 lb = 0.071429 st
High-precision rounding: 6 decimals
How to convert pound (lb) to stone (st)
We convert by pivoting through the SI base unit for Mass and applying exact factors where applicable.
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Examples
Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).
Common mistakes
- Confusing mass (lb) with force (lbf) in engineering contexts.
- Mixing metric tonnes (t) with short/long tons.
About Mass
Mass quantifies the amount of matter. The kilogram is defined by Planck’s constant, which anchors mass to fundamental physics. In practice, grams and pounds dominate everyday use—from recipes and parcels to body weight—while tonnes and long tons appear in logistics and industry.
About Pound (lb)
Pound (lb)
Imperial/US unit of mass; exactly 0.45359237 kg. Popular for body weight, groceries, and engineering specs in US industry.
History: Standardized in 1959; traces back to the Roman libra. Different historical pounds existed (avoirdupois, troy) before modern unification.
About Stone (st)
Stone (st)
Equals 14 lb (≈6.35029 kg). Commonly used for body weight in the UK and Ireland; pairs naturally with feet/inches.
History: Historically varied by commodity and region. Later standardized for personal weight and sports reporting.