Weight & Mass Converter

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

Value
From
To
1 Kilogram = — Pound
Common Weight Conversions
FromToResult
1 KilogramPounds2.20462 lb
1 PoundKilograms0.453592 kg
1 KilogramOunces35.274 oz
1 OunceGrams28.3495 g
1 StoneKilograms6.35029 kg
1 StonePounds14 lb
1 Metric TonKilograms1,000 kg
1 Short TonKilograms907.185 kg

Frequently Asked Questions

One kilogram equals 2.20462 pounds. Conversely, one pound equals 0.453592 kilograms. The kilogram is the SI base unit of mass, while the pound is used in the US customary and imperial systems.
Mass is the amount of matter in an object (measured in kg or lb) and does not change with location. Weight is the force exerted on a mass by gravity and varies by planet or altitude. In everyday use these terms are used interchangeably, but scientifically they are different quantities.
A stone is a unit of weight used in the UK and Ireland equal to 14 pounds or 6.35029 kilograms. It is commonly used for body weight in the UK. So a person weighing 70 kg is approximately 11 stone.
A metric ton (tonne) = 1,000 kg = 2,204.62 lb. A short ton (US ton) = 2,000 lb = 907.185 kg. A long ton (UK ton) = 2,240 lb = 1,016.05 kg. The metric ton is used internationally; the short ton is common in the United States.
Multiply pounds by 0.453592 to get kilograms. For a quick estimate, divide pounds by 2.2. For example, 150 lb ÷ 2.2 ≈ 68.2 kg (exact: 68.039 kg). To convert kg to lb, multiply by 2.20462.
The stone is a unit of weight used mainly in the UK and Ireland for measuring body weight. One stone equals exactly 14 pounds or 6.35029 kg. A person weighing 11 stone 4 pounds is 72.12 kg. The stone is not used in the United States or Canada.
A troy ounce = 31.1035 grams, used for precious metals (gold, silver, platinum). An avoirdupois ounce = 28.3495 grams, used for everyday goods. Troy ounces are about 10% heavier. When you see gold priced "per ounce," it always means the troy ounce.
For a quick mental conversion from kg to lb, multiply by 2 and add 10% (e.g., 70 kg → 140 + 14 = 154 lb; exact: 154.32 lb). For lb to kg, divide by 2 and subtract 10%. These mental shortcuts are accurate to within about 1–2%.
A metric ton and tonne are exactly the same: both equal 1,000 kilograms. "Tonne" is the spelling used in the International System of Units (SI) and by most countries, while "metric ton" is the term often used in the United States to distinguish it from the short ton (907 kg) and long ton (1,016 kg).
Mass is the amount of matter in an object, measured in kilograms, and stays constant regardless of location. Weight is the gravitational force on that mass (W = mg), measured in newtons, and changes with gravity. You weigh less on the Moon but your mass is the same — a 70 kg person weighs 686 N on Earth but only 114 N on the Moon.

About This Weight Converter

This free weight and mass converter converts between kilograms, grams, milligrams, tonnes, pounds, ounces, stones, and other units. Enter a value and the result updates instantly.

When to use this converter

  • Converting body weight between kg and lbs for fitness or medical use
  • Calculating shipping weights for parcels and freight
  • Converting ingredient quantities in international recipes
  • Converting bulk commodity weights for trading or industrial use

Standards & References

Related Converters

Length Converter Volume Converter Cooking Converter Energy Converter

Related Articles

In-depth guides and technical articles.

View all →
Converters Aug 9, 2026
Why the Tola, Grain, and Troy Ounce Are Still in Active Use — Traditional Weight Units That Outlasted Metrication
The tola (11.664 grams) was never replaced in Indian and Gulf gold markets despite official metrication — because the South Asian gold trade embedded it in commercial practice so thoroughly that metric alternatives never displaced it. Here's why the grain (64.8 mg) persists in bullet weights and pharmacy, why a troy ounce (31.1g) and an avoirdupois ounce (28.3g) are different by 10% and both called "ounce," and why three different "tons" (short ton, metric tonne, long ton) each differ by enough to matter in commodity trading.
Converters Jul 21, 2026
A Bathroom Scale Measures Force, Not Mass — Why Your "Weight" Changes in Elevators, on the Moon, and in Space
A bathroom scale measures the normal force the floor exerts back on you — not your mass directly — which is why the same scale would misread your weight on the Moon by a factor of 6. Here's why elevators make you feel heavier or lighter while your mass never changes, why astronauts are in continuous free-fall rather than "zero gravity," and why weightless objects still have full inertia and can still injure you.
Converters Jun 18, 2026
You Don't Weigh Kilograms — You Have a Mass of Kilograms: And Other Weight Unit Confusions That Have Real Consequences
A kilogram is a unit of mass, but when you "weigh" yourself on a bathroom scale, you're measuring gravitational force being converted to mass units using Earth's g. Here's why mass vs weight conflation doesn't matter in everyday life but caused real aerospace disasters, why "stone" is used almost exclusively for human body weight in the UK, the tola's 11.6638g value (not the 10g approximation that causes gold pricing errors), and why "metric tonne vs short ton vs long ton" is a persistent international trade ambiguity.
Converters Jun 13, 2026
Combat Sport Weight Classes, Weight Cutting, and Why Losing 10kg Overnight Is Dangerous
MMA fighters sometimes lose 10+ kg between weigh-in and competition through dehydration — competing at weights 10–15% above their weight class. Here's how combat sport weight classes work, the physiology and risks of extreme weight cutting, regulatory responses, and how powerlifting handles weight classes differently.
Converters Jun 9, 2026
Troy Ounces, Gold Pricing, and Why Precious Metals Use a Different Weight System
A troy ounce (31.1g) is 9.7% heavier than an everyday ounce (28.35g) — and all precious metal pricing uses the troy system. Here's how gold prices work per gram and per tola, the three weight systems compared, and why karat means two completely different things.