Exact weight conversions using NIST-verified factors.
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| Unit Name | Symbol | Exact Ratio in SI Kilograms (kg) | System / Standard |
|---|---|---|---|
| Pound (avoirdupois) | lb |
0.45359237 kg (exact) |
NIST Handbook 44 / 1959 Yard & Pound Agreement |
| Kilogram | kg |
1.0 kg (SI Base Unit) |
BIPM SI Brochure, 9th ed. (Planck constant h) |
| Ounce (avoirdupois) | oz |
0.028349523125 kg (1/16 lb) |
NIST Handbook 44, Appendix C |
| Gram | g |
0.001 kg (exact 10⁻³ kg) |
BIPM SI Brochure, 9th ed. |
| Stone | st |
6.35029318 kg (14 lbs) |
UK Weights and Measures Act 1985 |
| US Short Ton | ton |
907.18474 kg (2,000 lbs) |
NIST SP 811 / Handbook 44 |
| Metric Tonne | t |
1000.0 kg (10³ kg) |
BIPM SI Accepted Unit |