Weight Converter — kg, lbs, Stone & More
Convert between kilograms, pounds, stone, ounces, tonnes and 12 weight units. Instant results with reference table. Free online.
All conversions from 1 Kilograms (kg)
Convert weight — kilograms, pounds, stone and more
A dedicated weight converter supporting 12 units including kilograms, grams, milligrams, pounds, ounces, stone, tonnes, US tons, imperial tons, carats, and grains. See all conversions at once with the quick reference table.
Weight conversion uses fixed mathematical ratios defined by international standards. The converter multiplies or divides by these precise factors: 1 kg = 2.20462 lbs, 1 lb = 16 oz, 1 stone = 14 lbs, 1 metric tonne = 1000 kg. All calculations happen instantly in your browser with full floating-point precision.
Weight conversion comes up in fitness tracking (gym equipment may use pounds while your app uses kilograms), cooking (recipes from different countries use different units), shipping (carriers may quote in pounds while packages are labeled in kilograms), and science (laboratory measurements universally use grams and kilograms).
When converting body weight, remember that 'stone' is commonly used in the UK and Ireland — 1 stone equals 14 pounds or about 6.35 kg. For precious metals and gems, the troy ounce (31.1 g) differs from the standard ounce (28.35 g), and carats (0.2 g) measure gemstone weight. Always verify which unit system your context requires.
General-purpose unit converters include weight but often lack specialized units like carats, grains, or the distinction between metric and US tons. This dedicated weight converter includes 12 units covering everyday, scientific, and specialized use cases with a quick reference table showing all conversions simultaneously.
How the Weight Converter Works
- Select the source weight unit (e.g. kilograms)
- Select the target weight unit (e.g. pounds)
- Enter a value — the result updates instantly
- Click any unit in the reference table to quickly switch targets
Weight Conversion Tips
The metric system uses kilograms and grams, while the US and UK use pounds and ounces. One kilogram equals approximately 2.205 pounds. In the UK, body weight is often expressed in stone (1 stone = 14 pounds = 6.35 kg). For precious gems, the carat (0.2 grams) is the standard unit. Tonnes (metric tons) and US tons differ slightly: 1 metric tonne = 1000 kg, while 1 US ton = 907.185 kg.
When to Use a Weight Converter
Use this converter when traveling between metric and imperial countries, tracking fitness goals across apps that use different units, shipping packages internationally (carriers may use different weight systems), cooking with recipes from different countries, or working with specialized units like carats for gemstones or grains for ammunition.
Common Use Cases
- •Convert body weight between kilograms and pounds for fitness tracking Unit Converter — Length, Weight & More
- •Convert recipe ingredients between grams, ounces, and pounds for international recipes
- •Calculate shipping weights in the required unit system for international freight
- •Convert gemstone weights between carats and grams for jewelry appraisals
- •Convert between metric tonnes and US tons for industrial or agricultural measurements
Expert Tips
- ✱For body weight, remember that 1 stone = 14 pounds — this unit is standard in the UK but rarely used elsewhere
- ✱The troy ounce (31.1g) used for precious metals differs from the standard avoirdupois ounce (28.35g) — always verify which system applies
- ✱When converting cooking measurements, note that dry ingredients measured by volume can vary significantly — weighing in grams is always more accurate
Frequently Asked Questions
- One kilogram equals exactly 2.20462 pounds. For a quick mental approximation, multiply kg by 2.2. To convert pounds to kg, multiply by 0.4536.
- A stone is a unit of weight used in the UK and Ireland, especially for body weight. One stone equals 14 pounds or approximately 6.35 kilograms. So 10 stone = 140 lbs = 63.5 kg.
- A metric tonne (or tonne) equals exactly 1000 kg (2204.6 lbs). A US short ton equals 2000 lbs (907.2 kg). A UK long ton equals 2240 lbs (1016 kg). The metric tonne is about 10% heavier than a US ton.
- Yes, completely free. All calculations happen in your browser — no data is sent to any server.
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