⚖️ Weight Converter

Weight Unit Converter
( g, kg, lb, oz, st, tons & more )

Convert between micrograms, milligrams, grams, kilograms, metric tons, ounces, pounds, stones, US tons, UK tons and more. Enter any value, get instant results.

Converter Tool
g
kg
From
    To
      Result
      1 g = 0.001 kg
      0.001
      kg
      The Formula
      kg = g × 0.001
      1 gram = 1 g, 1 kilogram = 1000 g
      1000 g= 1 kg
      1000 kg= 1 t
      16 oz= 1 lb
      14 lb= 1 st
      Unit Reference Table

      All weight units relative to 1 gram (g). Imperial/US definitions are exact.

      Unit NameSymbolValue in GramsCommon Usage

      Understanding Weight Measurement Units

      Weight (or mass) is a fundamental physical quantity. The SI base unit is the kilogram (kg), but we often use the gram (g) as a convenient base for conversions. Metric units use powers of ten, while imperial/US units have historical definitions.

      Metric System

      1 kilogram (kg) = 1000 g, 1 metric ton (t) = 1000 kg = 1,000,000 g. For smaller masses: 1 milligram (mg) = 0.001 g, 1 microgram (µg) = 0.000001 g.

      Imperial & US Customary Units

      1 ounce (oz) = 28.349523125 g, 1 pound (lb) = 16 oz = 453.59237 g, 1 stone (st) = 14 lb = 6350.29318 g, 1 US ton (short) = 2000 lb = 907184.74 g, 1 UK ton (long) = 2240 lb = 1016046.9088 g. These definitions are exact.

      Where They Are Used

      • Micrograms/milligrams – medicine, vitamins, scientific research
      • Grams/kilograms – cooking, grocery, body weight (most of the world)
      • Ounces/pounds – food, parcels, body weight (US/UK)
      • Stones – body weight in the UK and Ireland
      • Metric tons – shipping, vehicles, bulk materials
      • US/UK tons – heavy industrial use in respective countries
      Frequently Asked Questions
      How many grams are in a kilogram? +
      1 kilogram = 1000 grams exactly. This is the basis of the metric system.
      How do you convert pounds to kilograms? +
      Multiply pounds by 0.45359237. Example: 10 lb × 0.45359237 = 4.5359237 kg.
      What is 1 stone in pounds? +
      1 stone = 14 pounds exactly. It is still used for body weight in the UK.
      How many ounces in a pound? +
      1 pound = 16 ounces exactly.
      What is the difference between a US ton and a UK ton? +
      A US (short) ton = 2000 lb ≈ 907.185 kg. A UK (long) ton = 2240 lb ≈ 1016.047 kg.
      How many micrograms in a milligram? +
      1 milligram = 1000 micrograms. So 1 mg = 1000 µg.
      All Weight Conversion Pages

      Browse all 90 dedicated conversion pages, organized by unit.

      ✓ Copied to clipboard!