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Weight Converter

Convert between grams, kilograms, pounds, ounces, stones, tons, and more.

Result
— in
Quick Conversion Table
Based on current input
Unit Value

Weight (Mass) Conversion Guide

Cheat Sheet
  • 1 kg = 1000 g
  • 1 lb = 16 oz ≈ 0.453592 kg
  • 1 oz ≈ 28.3495 g
  • 1 stone = 14 lb ≈ 6.35029 kg
  • 1 metric tonne (t) = 1000 kg
  • 1 US ton (short) = 2000 lb ≈ 907.185 kg
  • 1 UK ton (long) = 2240 lb ≈ 1016.05 kg
  • 1 carat (ct) = 0.2 g
How conversions are calculated

Conversions use a **base unit** (kilogram, kg). Your input is converted to kg using a known factor, then from kg to the target unit. For example, lb → kg → g. This two-step approach keeps results accurate and consistent.

Examples: 1 lb × 0.453592 = 0.453592 kg; 1 oz × 28.3495 = 28.3495 g; 1 st = 14 lb ≈ 6.35029 kg.
When to use which unit
  • g / kg: science, labeling, most countries (metric).
  • oz / lb / st: food, body weight (US/UK customary).
  • t / ton (US/UK): freight, large loads.
  • ct, gr, dr: jewelry (carat), ammo/grains (gr), apothecaries (dr).

Weight – Full History