Common Converters
Weight and Mass Converter
Convert between metric, avoirdupois, troy and apothecary mass units. The kilogram is the SI base unit of mass; pounds and ounces below follow the international avoirdupois definitions (1 lb = 0.45359237 kg exactly).
WEIGHT AND MASS CONVERTER — INSTANT RESULT
All supported units — weight and mass
| Unit | Symbol | To kilogram (kg) | From kilogram (kg) |
|---|---|---|---|
| Metric Ton (tonne) | t | 1 t = 1,000 kg | 1 kg = 0.001 t |
| Kilogram | kg | 1 kg = 1 kg | 1 kg = 1 kg |
| Gram | g | 1 g = 0.001 kg | 1 kg = 1,000 g |
| Milligram | mg | 1 mg = 1e-06 kg | 1 kg = 1,000,000 mg |
| Microgram | µg | 1 µg = 1e-09 kg | 1 kg = 999,999,999.99999988 µg |
| Quintal | q | 1 q = 100 kg | 1 kg = 0.01 q |
| Pound | lb | 1 lb = 0.45359237 kg | 1 kg = 2.20462262 lb |
| Ounce | oz | 1 oz = 0.028349523 kg | 1 kg = 35.27396195 oz |
| Stone | st | 1 st = 6.35029318 kg | 1 kg = 0.15747304 st |
| US Ton (short ton) | ton (US) | 1 ton (US) = 907.18474 kg | 1 kg = 0.0011023113 ton (US) |
| UK Ton (long ton) | ton (UK) | 1 ton (UK) = 1,016.0469088 kg | 1 kg = 0.00098420653 ton (UK) |
| Hundredweight (US) | cwt (US) | 1 cwt (US) = 45.359237 kg | 1 kg = 0.022046226 cwt (US) |
| Hundredweight (UK) | cwt (UK) | 1 cwt (UK) = 50.80234544 kg | 1 kg = 0.019684131 cwt (UK) |
| Carat | ct | 1 ct = 0.0002 kg | 1 kg = 5,000 ct |
| Grain | gr | 1 gr = 6.479891e-05 kg | 1 kg = 15,432.35835294 gr |
| Slug | slug | 1 slug = 14.59390294 kg | 1 kg = 0.068521766 slug |
| Troy Ounce | oz t | 1 oz t = 0.031103477 kg | 1 kg = 32.15074657 oz t |
| Troy Pound | lb t | 1 lb t = 0.37324172 kg | 1 kg = 2.67922888 lb t |
| Pennyweight | dwt | 1 dwt = 0.0015551738 kg | 1 kg = 643.01493137 dwt |
| Atomic Mass Unit | u | 1 u = 1.66054e-27 kg | 1 kg = 6.02214e+26 u |
Popular weight and mass conversions
kg to lbg to ozoz to glb to kgg to kgmg to goz to lbst to kgst to lbt to lbton (US) to lbkg to stct to ggr to goz t to goz t to ozkg to tµg to mgslug to kgdwt to g
Frequently asked questions
What units does this weight and mass converter support?
It supports 20 units: Metric Ton (tonne) (t), Kilogram (kg), Gram (g), Milligram (mg), Microgram (µg), Quintal (q), Pound (lb), Ounce (oz), Stone (st), US Ton (short ton) (ton (US)), UK Ton (long ton) (ton (UK)), Hundredweight (US) (cwt (US)), Hundredweight (UK) (cwt (UK)), Carat (ct), Grain (gr), Slug (slug), Troy Ounce (oz t), Troy Pound (lb t), Pennyweight (dwt), Atomic Mass Unit (u).
What is the base unit of weight and mass?
The SI reference unit is the kilogram (kg). Every conversion is computed by converting the input to the base unit, then from the base unit to the target unit, so chained precision is preserved.
Is this converter accurate?
Yes. Conversion factors use exact legal definitions where they exist (for example 1 in = 25.4 mm exactly) and CODATA/ISO constants otherwise. Results are shown to up to 10 significant figures.