AnyTool
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How do I convert weight between kilograms, pounds, ounces and grams?

Type a value into AnyTool Weight Converter and pick the units. It instantly converts both ways between kilograms, grams, milligrams, pounds, ounces, stones, metric tonnes, troy ounces, carats, grains and more, and shows the value in every unit at once in a copyable table. Everything is calculated in your browser, so nothing is uploaded.

  • Live two-way conversion — type in either field and the other updates
  • Metric (mg, g, kg, t), avoirdupois (oz, lb, st, ton) and troy/apothecary (oz t, gr, ct) units
  • See the value in every unit at once, each row copyable
  • Exact, internationally-defined factors through a kilogram base
  • 100% in your browser — no upload, no signup, works offline

What is

Weight Conversion

Weight conversion changes a mass from one unit to another — for example kilograms to pounds. Because mass units are linearly proportional, each one is defined by a single factor relative to a base unit (the kilogram): one pound is exactly 0.45359237 kg and one ounce is exactly 28.349523125 g, so converting is multiplying to kilograms and dividing into the target unit.

Converters

Related terms

Kilograms to poundsGrams to ouncesStone to kilogramsTroy ounce

Frequently Asked Questions

One kilogram is about 2.20462 pounds, so multiply kilograms by 2.20462 to get pounds.

A pound is defined as exactly 0.45359237 kilograms, so one kilogram equals 1 ÷ 0.45359237 ≈ 2.2046226 pounds. To convert kilograms to pounds, multiply by 2.20462 — for example 5 kg is about 11.023 lb. To go the other way, multiply pounds by 0.45359237 to get kilograms.

Divide grams by 28.349523, or multiply by 0.035274. So 100 g is about 3.5274 oz.

One ounce is exactly 28.349523125 grams, so to convert grams to ounces you divide by 28.349523125 (or multiply by 0.0352739619). For example 250 g is about 8.818 oz. To convert ounces back to grams, multiply by 28.349523125.

A standard (avoirdupois) ounce is about 28.35 g; a troy ounce, used for precious metals, is about 31.10 g.

The everyday avoirdupois ounce is 28.349523125 grams, while the troy ounce — used for gold, silver and other precious metals — is 31.1034768 grams, roughly 10 percent heavier. They are different units, so a troy ounce of gold weighs more than a regular ounce. AnyTool converts both alongside grams, kilograms and pounds.

No. Every calculation runs in your browser, so nothing is sent to a server and it works offline.

AnyTool Weight Converter computes every result locally in JavaScript using exact conversion factors through a kilogram base. No value is uploaded, there is no tracking, and the page keeps working offline after the first load.

Detailed Explanation

Methodology

How the Weight Converter Works

AnyTool Weight Converter performs every calculation in the browser. Each unit declares a single linear factor relative to a shared kilogram base — the exact number of kilograms in one of that unit — so any unit converts to any other through kilograms without an N-by-N table. The factors are the internationally-agreed definitions: one pound is 0.45359237 kg, one ounce 0.028349523125 kg, one stone 6.35029318 kg, one troy ounce 0.0311034768 kg, one grain 0.00006479891 kg and one metric tonne 1000 kg. A value is multiplied to kilograms and then divided into the target unit.

  • Sixteen units spanning metric, avoirdupois, troy and apothecary systems
  • The kilogram is the shared base; each unit is one exact factor
  • Conversion is value to base to value, so any unit maps to any other
  • Editing either field converts both directions live
  • All arithmetic is client-side JavaScript — no server round-trip
How It Works

Mass Versus Weight, and the Unit Systems

Strictly these are units of mass; in everyday language "weight" is used interchangeably because on Earth true weight (mass times gravitational acceleration) is proportional to mass. The converter covers the metric system (microgram to tonne), the avoirdupois system used for everyday goods (ounce, pound, stone, hundredweight, short and long tons), the troy system used for precious metals (troy ounce), the gemstone carat, the apothecary grain, and the slug used in gravitational engineering units.

  • Metric: microgram, milligram, gram, kilogram, metric tonne
  • Avoirdupois: ounce, dram, pound, stone, hundredweight, US and imperial tons
  • Troy and gem: troy ounce (precious metals), carat (gemstones)
  • Specialist: grain (ammunition, medicine) and slug (engineering)
  • Units are mass; weight equals mass times gravity on Earth
Privacy & Security

Privacy and Offline Use

Because all conversion runs in the browser, no value is sent to a server, there is no account or tracking, and the page works offline after first load. The converter is built on a shared, unit-tested conversion engine that other AnyTool unit converters reuse, so behaviour is consistent across the site.

Weight conversion: in-browser (AnyTool) vs typical online converters
CapabilityAnyToolTypical online converters
ProcessingRuns in your browserOften server-side
Units16: metric, avoirdupois, troy, apothecaryOften a smaller fixed set
Two-way inputEdit either field, both updateUsually one-direction with a button
All units at onceYes, copyable tableOften one target at a time
Precision controlAdjustable 0-10 decimalsFrequently fixed
Works offlineYes (PWA)No
Cost / signupFree, no signupOften ad-heavy or gated

AnyTool converts every unit locally through a kilogram base and uploads nothing.