SwiftCalcTools

Weight Converter — Convert Weight & Mass Units

Convert weight and mass units — kilograms, pounds, grams, ounces, tonnes, stones, and more.

🔄 Unit Converters ✅ Free

By SwiftCalcTools Editorial Team · Formula verified

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How to Use Weight Converter

  1. 1Enter the required values in the input fields above.
  2. 2Click the Calculate button or results update instantly as you type.
  3. 3View your results in the output panel below the inputs.
  4. 4Adjust any values to recalculate instantly.

Frequently Asked Questions

1 kg = 2.20462 pounds. Multiply kg by 2.20462. Example: 70 kg = 70 × 2.20462 = 154.32 lbs. Quick mental trick: multiply by 2 and add 10%. 70 × 2 = 140, +10% = 154. To convert pounds to kg: divide by 2.20462 (or multiply by 0.4536).
Mass is the amount of matter in an object (kg, g, lb) — it's constant everywhere. Weight is the force of gravity on that mass (in Newtons). On the Moon, your mass is the same but weight is 1/6th. In everyday language, "weight" and "mass" are used interchangeably, but in physics, they are different quantities.
1 pound = 16 ounces (avoirdupois). 1 ounce = 28.3495 grams. The troy ounce (used for precious metals) is slightly different: 1 troy ounce = 31.1035 grams. Gold and silver prices are quoted per troy ounce. A "cup" in US cooking is a volume measure, not a weight.
Metric tonne: 1,000 kg = 2,204.6 lbs (used in India and most of the world). Short ton (US ton): 2,000 lbs = 907.2 kg. Long ton (UK): 2,240 lbs = 1,016 kg. In India, "ton" usually means metric tonne. When ordering materials, always confirm which ton is meant.