Weight Converter

Convert Any Unit of Weight

Our converter supports a wide range of weight and mass units used across everyday life, science, trade, and industry, including:

• Metric: Milligram (mg), Gram (g), Kilogram (kg), Metric Ton / Tonne (t)
• Imperial / US customary: Ounce (oz), Pound (lb), Stone (st), Short Ton (US ton), Long Ton (UK ton)
• Scientific: Microgram (µg),
• Nanogram (ng)
  Traditional: Carat (ct), Troy Ounce (troy oz), Troy Pound

Whether you need to convert kilograms to pounds for a gym goal, grams to ounces for a recipe, or tonnes to short tons for a shipping calculation, this tool has you covered.

Why Use a Weight Converter?

Weight is measured differently depending on your country, industry, and purpose. The United States uses pounds and ounces for everyday weight, while most of the world uses kilograms and grams. The UK uses a mix of both, plus stone for body weight. Jewelers work in carats and troy ounces, while shipping and logistics use metric tonnes or short tons. Getting the conversion wrong can affect health, safety, and business.
A reliable weight converter helps you:

• Track fitness accurately — convert your body weight between kilograms, pounds, and stone to match your gym app, doctor’s chart, or personal goal.
• Cook and bake correctly — convert between grams, ounces, and pounds to follow any recipe from anywhere in the world.
• Ship and trade confidently — convert between metric tonnes, short tons, and long tons for freight, logistics, and international trade.
• Work in science and medicine — convert between micrograms, milligrams, and grams for accurate dosage, lab work, and research.

How Accurate Is This Converter?

Our converter uses precise, internationally recognized conversion factors. For example:

• 1 Kilogram = 1,000 Grams (exact)
• 1 Pound = 453.59237 Grams (exact, by international definition)
• 1 Ounce = 28.349523125 Grams (exact)
• 1 Stone = 14 Pounds (exact)
• 1 Metric Ton = 1,000 Kilograms (exact)

Results are displayed to several decimal places to ensure accuracy for both everyday use and technical applications.

FAQs

Q: How do I convert Kilograms to Pounds?

A: Multiply the kilogram value by 2.20462. For example, 70 kg × 2.20462 = 154.32 lbs. Our converter does this automatically — just enter your value, select “Kilograms” as the input unit, and “Pounds” as the output.

Q: How do I convert Pounds to Kilograms?

A: Multiply the pound value by 0.453592. For example, 150 lbs × 0.453592 = 68.04 kg. This is a common conversion for fitness tracking, medical records, and international travel.

Q: What is the difference between Weight and Mass?

A: Mass is the amount of matter in an object and stays the same everywhere in the universe. Weight is the force of gravity acting on that mass and changes depending on where you are — for example, you weigh less on the Moon than on Earth. In everyday use, the terms are used interchangeably, but in science and engineering, the distinction matters.

Q: What is a Stone, and where is it used?

A: A stone is a unit of weight equal to exactly 14 pounds or approximately 6.35 kilograms. It is used primarily in the United Kingdom and Ireland to measure body weight. For example, a person weighing 70 kg is approximately 11 stone.

Q: What is the difference between a Metric Ton, a Short Ton, and a Long Ton?

A: All three are used to measure large weights but belong to different systems. A metric ton (tonne) equals 1,000 kilograms or approximately 2,204.62 pounds. A short ton (US ton) equals 2,000 pounds or approximately 907.18 kilograms. A long ton (UK ton) equals 2,240 pounds or approximately 1,016.05 kilograms. Always confirm which ton is being used in international trade and shipping.

Q: How many Grams are in an Ounce?

A: There are exactly 28.349523125 grams in one avoirdupois ounce — the standard ounce used for food, cooking, and everyday goods. Note that a troy ounce (used for precious metals) equals 31.1035 grams, which is slightly heavier.

Q: What is a Troy Ounce, and when is it used?

A: A troy ounce equals approximately 31.1035 grams and is used exclusively for weighing precious metals such as gold, silver, and platinum. It is heavier than a standard (avoirdupois) ounce and should not be confused with it when comparing metal prices or weights.

Q: What is a Carat, and how is it used?

A: In terms of weight, a metric carat equals exactly 0.2 grams or 200 milligrams. It is used internationally to measure the weight of gemstones, especially diamonds. Note that carat as a weight unit is different from karat, which measures the purity of gold.

Q: What units does the weight converter support?

A: Our tool currently supports Nanogram, Microgram, Milligram, Gram, Kilogram, Metric Ton, Ounce, Pound, Stone, Short Ton, Long Ton, Troy Ounce, Troy Pound, and Carat. More units may be added based on user feedback.

Q: Is this weight converter free to use?

A: Yes — completely free, with no account required. Use it as many times as you like, on any device.

Q: Can I use this tool on my phone?

A: Absolutely. Our weight converter is fully responsive and works on smartphones, tablets, and desktop computers.

Q: Why do my converted results show many decimal places?

A: To ensure precision, especially for scientific, medical, or commercial use. If you need a rounded result, simply round to the number of decimal places appropriate for your task.