CALTRX

Weight Calculator

Enter a weight and convert between pounds, kilograms, ounces, stone, and grams.

Convert via kg: value \u00d7 (factor_from / factor_to)
lb= 1 lb = 0.453592 kg
oz= 1 oz = 28.3495 g
stone= 1 stone = 6.35029 kg

Tips & Notes

  • ✓All conversions go through kilograms as the intermediate unit.
  • ✓1 stone = 14 pounds exactly.
  • ✓1 pound = 16 ounces exactly.
  • ✓Metric ton = 1000 kg = 2204.62 lb.

Common Mistakes

  • ✗Confusing troy ounces (precious metals) with avoirdupois ounces (everyday use).
  • ✗Mixing up gross weight and net weight.
  • ✗Forgetting that stone is 14 pounds, not 10.
  • ✗Using mass units when force (weight) units are needed in physics.

Weight Calculator Overview

What This Calculator Does

The Weight Calculator converts any weight value between five common units: pounds, kilograms, ounces, stone, and grams. Enter a value in one unit and instantly see the equivalent in all others.

Common Weight Conversions

1 kilogram = 2.20462 pounds = 35.274 ounces = 0.15747 stone = 1000 grams. These conversions are exact to the precision shown and follow the International System of Units (SI) definitions.

When to Use Each Unit

Kilograms are the SI standard used globally in science and most countries. Pounds are standard in the United States for everyday use. Stone is traditional in the UK and Ireland for body weight. Ounces are used for smaller weights in cooking and postal services. Grams are used in cooking, nutrition labels, and laboratory work.

Practical Applications

International shipping requires weight conversions between metric and imperial systems. Cooking recipes from different countries use different units. Fitness tracking often requires converting between the units used by different scales, apps, and health systems.

Frequently Asked Questions

A US (short) ton = 2000 lb = 907.185 kg. A metric ton (tonne) = 1000 kg = 2204.62 lb.

A stone is 14 pounds or 6.35029 kg. It is traditionally used in the UK and Ireland for body weight.

Conversions use internationally defined factors accurate to 6+ significant digits.

The Weight Calculator uses standard validated formulas and provides results accurate to multiple decimal places. Review the step-by-step explanation to verify each calculation.