Mass is the amount of matter in an object and remains constant regardless of location. Weight is the force of gravity acting on that mass and varies depending on gravitational field. On Earth's surface, weight and mass are often used interchangeably in everyday language, but scientifically they differ — mass is measured in kilograms (kg), while weight is measured in Newtons (N). Our converter handles mass units, which are universally applicable across all locations.
Weight Converter
Convert between kilograms, pounds, ounces, stone, tola, carat, troy ounce and 20+ more weight units with scientific precision.
Conversion Formula
1 kilogram = 2.20462262 pounds
Common Weight Conversions
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How to Use the Weight Converter
Our weight converter is engineered for precision, speed, and ease of use — whether you're converting kilograms to pounds, tola to grams, or troy ounces to carats.
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Select Source Unit Choose the unit you're converting from — e.g., kilograms, pounds, or tola.
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Select Target Unit Pick the unit you want the result in from the second dropdown.
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Enter the Value Type the number — results update instantly as you type, no button needed.
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Swap Direction Click the swap button to instantly reverse the conversion direction.
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View the Formula The exact conversion formula is displayed below for transparency and verification.
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Use Sidebar Filter Click a system in the sidebar to filter the dropdowns to just those units.
Weight Systems of the World
Different regions and industries use different weight systems. Our converter supports all major systems used worldwide, with exact conversion factors from international metrology standards.
Why Professionals Choose ASLI FORM
Built with precision engineering and premium design, our weight converter meets the demands of jewelers, scientists, engineers, cooks, and students worldwide.
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Scientific Precision Results accurate to 15 significant digits using NIST, BIPM, and international standards.
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Instant Results Real-time conversion as you type — no buttons to click, no waiting.
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Works Offline All calculations run locally in your browser. Perfect for jewelry shops, labs, and field work.
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Universal Compatibility From basic keypad phones to 4K displays — works on every device, every OS.
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Zero Tracking No cookies, no analytics, no data collection. Your privacy is absolute.
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Free Forever No subscriptions, no hidden fees, no usage limits, no advertisements.
Frequently Asked Questions
1 pound (lb) equals exactly 0.45359237 kilograms, and 1 kilogram equals approximately 2.20462 pounds. This is an exact definition established by the international yard and pound agreement of 1959, signed by the United States, United Kingdom, Canada, Australia, New Zealand, and South Africa. The formula is: kg = lb × 0.45359237.
A stone is a British imperial unit of weight equal to 14 pounds or exactly 6.35029318 kilograms. It is commonly used in the United Kingdom and Ireland for measuring body weight. So if you weigh 10 stone, that's 140 pounds or about 63.5 kg. Stones are rarely used in the United States or other countries that have adopted the metric system.
These are traditional South Asian weight units still widely used in India, Pakistan, Bangladesh, and Nepal, especially for gold, silver, and jewelry:
- 1 Tola = 11.6638 grams (standard tola, also called "Sikka Tola")
- 1 Masha = 0.972 grams (1/12 of a tola)
- 1 Ratti = 0.1215 grams (1/8 of a masha, traditionally based on the Gunja seed)
Troy units are a separate weight system historically used for precious metals and gemstones. A Troy ounce (31.1035 grams) is heavier than a regular (avoirdupois) ounce (28.3495 grams). The Troy system originated in the French market town of Troyes in the Middle Ages and is still the global standard for pricing gold, silver, platinum, and palladium. Using the wrong system can cause costly errors in precious metals trading — that's why our converter supports both systems clearly.
Our converter delivers results accurate to 15 significant digits using conversion factors from official metrology institutes including NIST (US), BIPM (International Bureau of Weights and Measures), and the International Yard and Pound Agreement of 1959. This level of precision is suitable for scientific research, engineering, jewelry, pharmaceuticals, and all professional applications.
There are three different types of "ton" in common use:
- Metric ton (tonne) = 1,000 kilograms
- Short ton (US ton) = 2,000 pounds = 907.185 kg
- Long ton (UK ton) = 2,240 pounds = 1,016.05 kg
A metric carat is a unit of mass equal to exactly 0.2 grams (200 milligrams), used worldwide for measuring gemstones and pearls. It was standardized internationally in 1907. So a 1-carat diamond weighs 0.2 grams. Note: "carat" (with a 'c') measures weight, while "karat" (with a 'k') measures gold purity (24 karat = pure gold). Our converter uses the metric carat for weight conversions.
A slug is a unit of mass in the US customary system of units, primarily used in physics and engineering. One slug equals approximately 14.5939 kilograms. It is defined as the mass that accelerates at 1 ft/s² when a force of 1 pound-force is exerted on it. Slugs are rarely used in everyday life but are important in mechanical engineering, aerospace, and physics calculations using the foot-pound-second (FPS) system.
Yes. Once the page loads, all calculations happen locally in your browser. There is no server-side processing, no API calls, and no internet dependency for conversions. This makes the tool perfect for jewelry shops, laboratories, remote locations, and anywhere connectivity is limited or unavailable.
Absolutely. Our converter is designed with a mobile-first responsive approach and works perfectly on every device — from basic keypad phones to 4K desktop displays. The interface adapts intelligently: desktops get a sticky sidebar, tablets get a grid layout, and mobile devices get optimized dropdowns with a collapsible drawer. Touch interactions, scroll snapping, and momentum scrolling are all optimized for mobile use.
We welcome feedback from our users. You can reach our support team through multiple channels:
- Phone: +91-7011993433 (Mon-Sat, 9 AM to 7 PM IST)
- WhatsApp: Same number with pre-filled message
- Email: support@asliform.in
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