Weight converter
Pounds and kilograms have been locked together by definition since 1959: one pound is exactly 0.453 592 37 kg. Every weight unit here is built on that link or on the SI kilogram, so results are exact to the digits shown.
70 kg = 154.3235835 lb(154 lb 5.2 oz)
Formula: lb = kg × 2.20462262185
70 kg in every weight unit
- milligram
- gram
- tonne
- ounce
- pound
- stone
- short ton (US)
- long ton (UK)
Popular weight conversions
How it works
Where the number 6.3502932 comes from
Nothing is measured here. Every step below is a definition written into law or into the SI.
1 st
Every weight unit, defined
Each unit expressed in kilograms, with its exact definition and source.
| Unit | In kg | Definition | Source |
|---|---|---|---|
| milligram (mg) | 0.000001 | 1 mg = 0.000 001 kg | BIPM SI Brochure |
| gram (g) | 0.001 | 1 g = 0.001 kg | BIPM SI Brochure |
| kilogram (kg) | 1 | SI base unit, fixed by the Planck constant | BIPM SI Brochure |
| tonne (t) | 1,000 | 1 t = 1000 kg | BIPM SI Brochure |
| ounce (oz) | 0.028349523125 | 1 oz = 1/16 lb = 28.349 523 125 g | NIST SP 811, App. B (1959 yard & pound agreement) |
| pound (lb) | 0.45359237 | 1 lb = 0.453 592 37 kg exactly | NIST SP 811, App. B (1959 yard & pound agreement) |
| stone (st) | 6.35029318 | 1 st = 14 lb = 6.350 293 18 kg | UK Weights and Measures Act 1985 |
| short ton (US) (US ton) | 907.18474 | 1 short ton = 2000 lb = 907.184 74 kg | NIST Handbook 44, App. C |
| long ton (UK) (UK ton) | 1,016.0469088 | 1 long ton = 2240 lb = 1016.046 908 8 kg | NIST Handbook 44, App. C |
Questions
How many pounds are in a kilogram?
1 kg = 2.204 622 621 85 lb (1 ÷ 0.453 592 37).
How many grams are in an ounce?
One avoirdupois ounce is exactly 28.349 523 125 g.
How much is a stone?
A stone is 14 pounds, which is exactly 6.350 293 18 kg.
Is a US ton the same as a metric tonne?
No. A US short ton is 2000 lb (907.184 74 kg); a UK long ton is 2240 lb (1016.05 kg); a metric tonne is 1000 kg.
Is this weight or mass?
Strictly, kilograms and pounds measure mass. In everyday language "weight" means the same thing, and the conversion is identical.