Weight Converter

Convert weight instantly between milligrams, grams, kilograms, metric tons, ounces, pounds, and stones.

How Weight Conversion Works

Weight is measured using both the metric system (mg, g, kg, tonnes) and the imperial system (oz, lb, st). Each unit has a fixed relationship with kilograms (the base SI weight unit). To convert, values are first converted to kilograms and then converted to the target unit.

Base Conversion Factors

1 mg   = 0.000001 kg
1 g    = 0.001 kg
1 kg   = 1 kg
1 ton  = 1000 kg
1 oz   = 0.0283495 kg
1 lb   = 0.453592 kg
1 st   = 6.35029 kg

Common Use Cases

  • Cooking and recipe conversions
  • Health, fitness, and body weight tracking
  • Shipping and logistics
  • Academic and scientific measurements

Frequently Asked Questions

A kilogram is larger. 1 kg ≈ 2.20462 pounds.
Pounds are part of the imperial system, widely used in the US and UK.
Ounces (oz) measure weight (mass), while fluid ounces (fl oz) measure volume.