Weight Converter
Convert between weight units instantly with our free weight converter. Supports 9 units including metric (mg, g, kg, metric tons) and imperial (ounces, pounds, stones, short tons, long tons). Get accurate conversions with up to 4 decimal places. Perfect for cooking, shipping, fitness, and everyday measurements.
Result
💡 All conversions happen in your browser. No data is sent to any server.
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How to Use
- 1 Enter your value in the "From" field. You can type any number, including decimals (e.g., 5.5, 100, 0.25).
- 2 Select your units from the dropdown menus. Choose the unit you're converting from (e.g., kilograms) and the unit you want to convert to (e.g., pounds).
- 3 See instant results as you type. The conversion happens in real-time with no delay. The result appears in the "To" field with up to 4 decimal places for precision.
- 4 Use the swap button (↔) to quickly reverse the conversion direction. This exchanges the "From" and "To" units and values.
- 5 Try quick conversions by clicking preset buttons like "Kilograms → Pounds" or "Grams → Ounces" for common conversions.
💡 Pro Tip: The converter handles very large and very small numbers automatically, using scientific notation when needed. Perfect for everything from cooking measurements to shipping weights.
Frequently Asked Questions
What weight units are supported?
Our weight converter supports 9 units across two systems: Metric (milligrams, grams, kilograms, metric tons) and Imperial (ounces, pounds, stones, short tons, long tons). This covers the most common weight measurements used worldwide for cooking, shipping, fitness tracking, and commercial purposes. All conversions use internationally recognized standards for accuracy.
How accurate are the conversions?
All conversions use precise conversion factors based on international standards. For example, 1 pound = exactly 453.59237 grams, and 1 ounce = exactly 28.349523125 grams. Results are displayed with up to 4 decimal places, which is more than sufficient for cooking, shipping, and most commercial applications. The underlying calculations maintain full floating-point precision for scientific accuracy.
What's the difference between short tons and long tons?
A short ton (US ton) equals 2,000 pounds or 907.18 kilograms, commonly used in the United States. A long ton (UK ton) equals 2,240 pounds or 1,016.05 kilograms, traditionally used in the United Kingdom. The difference is about 12% - long tons are heavier. Most modern international commerce uses metric tons (1,000 kg), which are slightly lighter than long tons but heavier than short tons.
When should I use stones as a unit?
Stones are primarily used in the United Kingdom and Ireland for measuring body weight. One stone equals 14 pounds or approximately 6.35 kilograms. While less common internationally, stones remain popular in UK healthcare and fitness contexts. For example, someone might say they weigh "11 stone 5" (11 stones and 5 pounds). Most other countries use kilograms for body weight.