Weight & Mass Unit Converter

Convert between kilograms, pounds, ounces, grams, milligrams, metric tons, stones, and US tons with exact scientific conversion factors and live multi-unit comparison tables.

Weight & Mass Parameters

Quick Sample Presets
kg
Converted Mass & Weight Result
2.204624lb

1 Kilogram = 2.204624 Pound

Unit Rate1 kg = 2.204624 lb

Kilograms (kg)

1 kg

Pounds (lb)

2.204624 lb

Ounces (oz)

35.273991 oz

Grams (g)

1,000 g

Simultaneous Weight Equivalents

1 kg converted
Metric Ton(t)
0.001
Kilogram(kg)
1
Gram(g)
1,000
Milligram(mg)
1,000,000
Pound(lb)
2.204624
Ounce(oz)
35.273991
Stone(st)
0.157473
US Ton(ton)
0.001102

1 Kilogram is equal to 2.204624 Pound.

Conversion factor: 1 kg = 2.204624 lb.

The Mathematics of Metric & Imperial Weight Conversion

Mass is a measure of the amount of matter in an object, while weight is the gravitational force acting upon that mass (W = m × g). The International System of Units (SI) defines the kilogram (kg) as the base unit of mass, defined via the Planck constant (h = 6.62607015 × 10-34 kg·m²/s).

Mass & Weight Conversion Governing Equation
Target Mass=Source Mass ×
Source Unit to Kilogram Factor (kfrom)Target Unit to Kilogram Factor (kto)
Exact Legal Conversion Multipliers (NIST Standards)
1 lb = 0.45359237 kg (exact)|1 oz = 28.349523 g (exact)|1 stone = 14 lb = 6.35029 kg|1 US ton = 2,000 lb = 907.185 kg
Step-by-Step Calculation Breakdown
Example 1: Convert 75 Kilograms to US Pounds (lb)
1. Conversion ratio: 1 kg ≈ 2.20462262 lbs.
2. Set up multiplication: Pounds = 75 kg × 2.20462262 lb/kg
3. Execute multiplication: 75 × 2.20462262 = 165.346697 pounds (or 165 lb 5.5 oz)
Example 2: Convert 8 Ounces of Flour to Grams
1. Conversion ratio: 1 oz = 28.349523 grams.
2. Multiply: 8 oz × 28.349523 g/oz = 226.796 grams.

Weight & Mass Unit System Reference Matrix

Unit NameSymbolSystemValue in SI Kilograms (kg)
Metric TontMetric / SI1000 kg
KilogramkgMetric / SI1 kg
GramgMetric / SI0.001 kg
MilligrammgMetric / SI0.000001 kg
PoundlbUS Customary0.453592 kg
OunceozUS Customary0.0283495 kg
StonestUK Imperial6.35029 kg
US TontonUS Customary907.185 kg

Frequently Asked Questions

How many grams are in one avoirdupois ounce?
One avoirdupois ounce equals exactly 28.349523125 grams (commonly rounded to 28.35 g). To convert ounces to grams, multiply the ounce measurement by 28.3495.
What is the exact conversion ratio between pounds and kilograms?
Under the 1959 International Yard and Pound Agreement, exactly 1 avoirdupois pound equals 0.45359237 kilograms, and 1 kilogram equals approximately 2.20462262 pounds.
What is the difference between a Metric Ton, US Short Ton, and Imperial Long Ton?
A Metric Ton (tonne) is 1,000 kg (2,204.62 lbs). A US Short Ton is 2,000 lbs (907.185 kg). An Imperial Long Ton (UK) is 2,240 lbs (1,016.05 kg).
What is a stone and where is it used?
A stone is an imperial mass unit equal to exactly 14 pounds (6.35029 kg). It remains widely used in the United Kingdom and Ireland for reporting human body weight.

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