Weight Conversion

Convert between kilograms, grams, pounds, ounces, and more

Weight Conversion
ready
$ convert --from [unit] --to [unit] --value [number]
$
>
formulas.ts

// Common Weight Conversion Formulas

1const1 kilogram = 1000 grams
2const1 pound ≈ 0.4536 kilograms
3const1 pound = 16 ounces
4const1 ton = 1000 kilograms
5const1 ounce ≈ 28.35 grams
references.json

// Common Weight Conversion References

{
"A4 Paper Weight":"5g",
"Average Apple Weight":"150g",
"Average Adult Weight":"70kg",
"Standard Container Max Load":"26 tons"
}
guide.md

Mass and weight on this converter

Everyday “weight” converters usually convert mass: kilograms, grams, pounds, and ounces. On Earth, people treat mass and weight interchangeably because gravity is roughly constant. Scientifically, weight is a force (newtons), while mass is an amount of matter (kilograms). This tool converts mass units using fixed ratios.

method.ts

How the calculation runs

  1. Normalize the input to kilograms (SI base unit of mass).
  2. Apply the target-unit factor from kilograms.
  3. For avoirdupois pound and ounce, use the international definitions tied to the kilogram.
sources.md

Definitions used

  • - SI Brochure (BIPM): kilogram as SI base unit of mass.
  • - International yard and pound agreement: 1 lb = 0.45359237 kg exactly.
  • - NIST Handbook 44 / NIST SP 811: customary mass conversion factors.
examples.md

Worked examples

Convert 70 kg to pounds (body weight)

  1. 1 lb = 0.45359237 kg.
  2. pounds = 70 / 0.45359237 ≈ 154.324.

Result: 70 kg ≈ 154.32 lb

Convert 500 g to ounces (kitchen)

  1. 500 g = 0.5 kg.
  2. 1 oz (avoirdupois) = 0.028349523125 kg.
  3. 0.5 / 0.028349523125 ≈ 17.637 ounces.

Result: 500 g ≈ 17.64 oz

What people mix up

  • • Troy ounce (precious metals) is not the same as the food ounce used in recipes.
  • • Stone (14 lb) is still used for body weight in the UK and Ireland; it is not SI.
  • • Airline baggage limits are usually kilograms; US travelers often think in pounds—check the carrier’s unit.

Typical uses

  • - Fitness tracking when a scale and an app disagree on units.
  • - Shipping and luggage weight limits.
  • - Recipe scaling when an ingredient list uses grams and your scale shows ounces.
FAQ.md

Weight FAQ

01 Q: Does this convert weight in newtons?

No. This page converts mass units (kg, lb, oz). Force/weight in newtons belongs on a force converter.

02 Q: Quick rule of thumb for kg to lb?

Multiply kilograms by about 2.2. For precision, use 1 kg ≈ 2.2046226218 lb.

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