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Weight Converter

Convert weight and mass between milligrams, grams, kilograms, metric tons, ounces, pounds, and stones instantly.

Common Weight Presets
Converted Target Result
1 kg = 2.20462 lb

All Units Comparison Table

Simultaneous Breakdown
Unit Name Symbol Converted Equivalent
Formula Reference

Universal Weight Conversion Formula

Universal weight conversion normalizes mass measurements relative to 1 kilogram (SI base unit), enabling instant conversion between milligrams, grams, kilograms, metric tons, ounce...

$$\text{Target Weight} = \text{Source Weight} \times \left(\frac{\text{Source Scale}}{\text{Target Scale}}\right)$$
View Full Formula, Step-by-Step Guide & Worked Examples
Universal Mass & Weight Guide

Understanding Mass & Weight Units

Learn mass unit conversions between metric units (mg, g, kg, ton) and imperial units (oz, lb, stone).

Universal Metric vs Imperial Mass Scale Factors

All conversion ratios standardized relative to 1 Kilogram (SI base unit).

Mass Unit Name Symbol Base Kilogram Ratio Common Real-World Context
Gram g 0.001 kg Nutritional food labels & pharmaceuticals
Kilogram (SI Base) kg 1.0 kg Human body weight & grocery produce
Metric Ton t 1,000.0 kg Freight shipping cargo & vehicle weight
Ounce (Avoirdupois) oz 0.0283495 kg Postal package weights & baking ingredients
Pound (Imperial) lb 0.453592 kg US fitness body weight & gym weights
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How the Universal Weight Converter Works

01

Normalizing Every Unit to Kilograms

This converter normalizes milligrams, grams, kilograms, metric tons, ounces, and pounds by first converting the input value to kilograms, then dividing by the target unit's kilogram equivalent. Kilogram equivalents used are mg = 0.000001 kg, g = 0.001 kg, ton = 1,000 kg, oz = 0.028349523125 kg, and lb = 0.45359237 kg.

02

Why Ounces and Pounds Need a Precise Ratio

The avoirdupois pound used for everyday weighing is defined as exactly 0.45359237 kilograms, and since 1 pound equals 16 ounces, 1 ounce works out to exactly 0.028349523125 kilograms (about 28.35 grams). Routing conversions through kilograms keeps every unit pairing, such as ounces to metric tons, accurate without stacking rounding errors.

03

Worked Example: 70 Kilograms to Pounds

Convert a 70 kilogram body weight by dividing 70 by the pound ratio of 0.45359237, which gives 154.324 pounds. The same base-kilogram method instantly produces all 6 unit equivalents at once in the comparison table.

04

When to Use This Converter

This all-in-one tool is useful for comparing body weight, shipping cargo mass, or recipe ingredients across metric and imperial units at a glance. For a single focused conversion, use the dedicated KG to Pound Converter or Pound to KG Converter tools.

Good to know

Questions, answered

Quick answers about how this tool works.

There are 2.20462 pounds in 1 kilogram.

There are 453.592 grams in 1 pound.

There are 16 avoirdupois ounces in 1 pound.

There are 14 pounds in 1 UK stone.

70 kg is equal to 154.324 pounds.

100 grams is equal to 3.5274 ounces.

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