Convert UK imperial weight units: Stone (st) ↔ Pound (lb) — 1 UK Stone = 14 Pounds (avoirdupois pound) for UK weight measurement, fitness tracking, agriculture, and traditional British trade calculations.
Select conversion direction:
UK Imperial Weight Conversion Formula:
1 UK Stone (st) = 14 Pounds (lb) = 6.35029 kg = 224 Ounces (oz) | 1 lb = 0.0714286 st = 0.453592 kg = 16 oz
lb = st × 14 | st = lb ÷ 14 (Results: 6 decimal places for weight units)
*UK legal definition: 1 Stone = 14 avoirdupois pounds (1 lb = 0.45359237 kg) | Exclusive to UK/Ireland weight measurement
UK imperial weight unit: Used for human weight (UK/Ireland), livestock, agriculture — 1 st = 14 lb (6.35 kg)
Display format:
Quick conversions (common UK weight values) - click to auto-fill:
Useful for UK weight calculations? Share with fitness coaches, UK residents, farmers, or anyone needing st/lb conversions:
Understanding UK imperial weight units (stone, pound) for human weight, agriculture, and traditional British measurements.
| Unit | Symbol | Conversion Factor | Common Uses |
|---|---|---|---|
| UK Stone | st | 1 st = 14 lb = 6.35029 kg = 224 oz = 0.00635 ton | UK/Ireland human weight, livestock (sheep/cattle), agricultural produce |
| Avoirdupois Pound | lb | 1 lb = 0.0714286 st = 0.453592 kg = 16 oz = 7000 grains | Global imperial weight (UK/US), food packaging, small goods, fitness (non-UK) |
| Kilogram | kg | 1 kg = 0.157473 st = 2.20462 lb = 35.274 oz | Metric system (EU/global), scientific measurements, UK retail (dual labeling) |
| Stone (UK) (st) | ≈ | Pound (lb) | Practical Application |
|---|---|---|---|
| 1 | ≈ | 14.000000 | Basic UK stone unit (standard definition) |
| 7.5 | ≈ | 105.000000 | Teenager/adolescent weight (UK) |
| 10.5 | ≈ | 147.000000 | Average adult weight (UK, mixed gender) |
| 15 | ≈ | 210.000000 | Heavy adult weight (UK) / livestock (sheep) |
| 0.5 | ≈ | 7.000000 | Half stone (common weight increment, UK) |
Accurate stone-to-pound conversion is critical for UK daily life—here’s how units scale for common use cases:
| Use Case | Primary Unit | st to lb Factor | Accuracy Tip |
|---|---|---|---|
| UK Human Weight | st (½ st increments) | ×14 | Use 0 decimals (e.g., 8.5 st = 119 lb) for everyday weight talk |
| Fitness Tracking (UK) | st/lb | ×14/÷14 | 1 st weight loss = 14 lb = 6.35 kg (common fitness goal) |
| Agriculture (UK) | st | ×14 | Round to whole pounds (e.g., 20 st sheep = 280 lb) for livestock trading |
| UK Retail (Dual Label) | lb/kg (no st) | ÷14 | Use 2 decimals (e.g., 50 lb = 3.57 st) for product labeling compliance |
About UK Stone to Pound conversions and imperial weight measurement standards
The 1:14 stone-to-pound ratio is a historic UK legal definition (not a metric conversion):
Precise factor: 1 st = 14.000000 lb (exact UK legal definition) | 1 lb = 0.0714285714 st
Practical use: 0 decimals for everyday weight; 6 decimals for legal/trade compliance
The stone is a uniquely British unit with very limited global use—here’s where it’s still standard:
Use these cross-unit conversion factors to bridge UK imperial and global metric weight:
1 UK Stone = 14 lb = 6.35029 kg | 1 lb = 0.453592 kg | 1 kg = 0.157473 st = 2.20462 lb
Total kg = (st × 14 + lb) × 0.453592 (for mixed st/lb values)
Practical cross-conversion examples (UK weight to metric):
These conversions are critical for UK travelers (healthcare abroad), international fitness tracking, and global trade of UK agricultural products.
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