Weight Calculator · Mass Unit Converter Free 2026
Convert between kilograms, grams, pounds, ounces, stones, and metric tons instantly. Perfect for cooking, fitness, shipping, and science.
How it works: Select source and target weight units, enter a value, and get the converted weight instantly. Supports 6 common mass units with high precision.
🎯 Why Use a Weight Converter?
Weight conversions are essential in daily life: cooking recipes (grams to ounces), fitness tracking (kilograms to pounds), shipping (pounds to kilograms), and science (grams to metric tons). Our Weight Calculator covers 6 units: kilograms (kg), grams (g), pounds (lb), ounces (oz), stones (st), and metric tons (t). The tool uses exact conversion factors (e.g., 1 kg = 2.20462262185 lb, 1 lb = 0.45359237 kg). All calculations happen locally – no data uploaded, ensuring privacy. The interface is clean, mobile‑responsive, and free of intrusive ads inside the tool area. Whether you're a chef, athlete, shipper, or student, this tool provides instant, accurate weight conversions.
The converter updates in real time as you type or change units. You can copy the result with one click. The tool also includes a usage counter, star rating, and like/dislike buttons for feedback. Best of all, it's 100% free with no signup or watermarks.
📘 How to Use the Weight Converter (Step by Step)
- Select source unit – Choose the unit you are converting from (e.g., kilograms).
- Select target unit – Choose the unit you want to convert to (e.g., pounds).
- Enter the value – Type the weight number (can be decimal).
- View the result – The converted value appears instantly.
- Copy the result – Click "Copy Result" to copy to clipboard.
✨ Powerful Features
⚙️ How It Works
The converter uses the kilogram as the base unit. Each unit has a factor relative to kilogram (e.g., 1 lb = 0.45359237 kg). Formula: result = value × factor_from / factor_to. JavaScript event listeners update the result on any change.
🌟 Applications
Cooking: Convert grams to ounces. Fitness: Track body weight in kg or lb. Shipping: Convert pounds to kilograms for international shipping. Science: Convert grams to metric tons. Jewelry: Convert carats (not included) but grams to ounces for precious metals.
❓ FAQ
1. What is the exact conversion from kg to lb?
1 kg = 2.20462262185 lb. Our tool uses this value.
2. How many grams in an ounce?
1 ounce = 28.349523125 grams.
3. What is a stone?
A stone is a British unit equal to 14 pounds or 6.35029318 kg.
4. Can I convert metric tons to pounds?
Yes, 1 metric ton = 2204.62262185 lb.
5. Does the tool support carats?
Not in this version, but you can convert grams to carats (1 carat = 0.2 g) manually.
6. Is the tool free?
Yes, completely free with no ads inside the tool area.