Weight & Mass Converter
Instantly convert between metric, imperial, and ton units. Features bi-directional syncing, live conversion matrices, and smart Stone & Pounds parsing.
Convert From
Convert To
Common Conversions
1 Kilogram =
2.204623 lbs
Also written as: 0 st 2.2 lbs
Live Conversion Matrix
| Unit | Equivalent Value |
|---|
Saved Conversions
🔒 Processed entirely in your browser. Zero uploads, zero tracking.
How to Use the Weight Converter
- Enter the Value: Type the number you want to convert into the "Convert From" box.
- Select Units: Choose your starting unit and the unit you want to convert into. The math executes instantly.
- Bi-Directional Typing: You can type into either the Left OR Right box! If you type a value in the "Convert To" box, the tool automatically reverse-calculates the "Convert From" box.
- Smart Stone Parsing: If you are converting a human body weight (like kg to lbs or stone), the Result Card will automatically display the proper real-world
Stones & Poundsformat used in the UK. - Live Matrix: Scroll down to see your exact inputted value converted into all 9 global weight units simultaneously.
Supported Weight & Mass Units
⚖️
Metric (SI) Units
Based on multiples of 10. Includes Milligrams (mg), Grams (g), Kilograms (kg), and Metric Tons (t).
🇺🇸
Imperial / US Customary
The historical standard used in the US and UK. Includes Ounces (oz), Pounds (lbs), and US Short Tons.
🇬🇧
UK Specific Units
Includes the Stone (st) used for human body weight, and the UK Long Ton used in historical shipping.
Common Everyday Uses
🧍 Body Weight ConversionConverting your weight from kg to pounds or stones for medical forms, fitness apps, or diet tracking.
🍳 Cooking & BakingSwitching between grams and ounces when following international culinary recipes.
✈️ Travel & ShippingEnsuring your airline baggage does not exceed the 23kg / 50lb limit before flying.
🏋️ Fitness & GymsCalculating the exact weight of a 45lb Olympic barbell in kilograms.
Why Choose Our Tool Suite?
- ✅ Smart Stone & Pounds Parser — Basic calculators return "12.59 stone", which is mathematically useless. We automatically parse decimals into human-readable
12 st 8.3 lbsformats. - ✅ Bi-Directional Inputs — You can type into either box to reverse-calculate the math without having to click the swap button.
- ✅ Live Conversion Matrix — Why do math twice? The table below the calculator instantly converts your input into 9 global units in real-time.
- ✅ 100% Client-Side Privacy — Runs entirely in your browser. None of your data is tracked or uploaded.
Frequently Asked Questions
What is the difference between a US Ton and a UK Ton?
A US ton (short ton) equals exactly 2,000 lbs (~907.18 kg). A UK ton (long ton) equals 2,240 lbs (~1,016.05 kg). A modern metric ton (tonne) is 1,000 kg (~2,204.62 lbs).
How many pounds are in 1 kilogram?
1 kilogram is approximately equal to 2.20462 pounds.
How many pounds are in a Stone?
One Stone is equal to exactly 14 pounds. It is primarily used in the UK and Ireland to measure human body weight.
Is this converter accurate for scientific use?
Yes — it uses standard SI-defined conversion factors. However, for ultra-high-precision lab work, you should always verify against your specific reference standards.