RubanTools

Weight & Mass Converter

Convert between mg, g, kg, tonne, lb, oz and stone - all conversions at a glance.

UnitValue

Why Use This Weight Converter

8 Units Together

See mg, g, kg, quintal, tonne, lb, oz and stone all at once from a single input.

Metric & Imperial

Covers both the SI metric system and the imperial system used in the US and UK.

Mobile-Friendly

Responsive layout - use it in the grocery store, gym, or kitchen on any device.

When to Convert Weight

Body Weight

Convert your weight between kilograms, pounds and stone for medical or fitness tracking.

Grocery Shopping

Compare product weights listed in oz vs grams, or kg vs lb at the supermarket.

Cooking & Baking

Convert recipe ingredient weights from ounces to grams or cups to grams easily.

Shipping & Freight

Calculate shipping costs by converting parcel weight between kg and lb for carriers.

Jewellery & Metals

Convert precious metal weights between grams, troy ounces and milligrams.

Agriculture & Trade

Convert commodity weights between quintals, tonnes and kilograms for trade documents.

Weight Conversion Questions

There are exactly 1,000 grams in 1 kilogram. The prefix "kilo" means one thousand in SI units.

1 pound (lb) = 0.45359237 kg exactly. Conversely, 1 kg = 2.20462 lbs. A quick approximation: 1 kg ≈ 2.2 lbs.

There are 16 avoirdupois ounces in 1 pound. Note that troy ounces (used for precious metals) are different - there are 12 troy ounces in a troy pound.

A quintal = 100 kg. It is widely used in Indian agriculture and commodity markets. 10 quintals = 1 metric tonne.

1 stone = 14 pounds = 6.35029 kg. Stone is still commonly used in the UK and Ireland to express body weight.