Whether you’re tracking your fitness progress, converting luggage weight limits between different airline standards, or shipping a package internationally, our weight converter handles all your conversion needs in one place.

Features of the Tool

• Convert between 12+ weight units including kg, lb, g, oz, stone, and carats
• Instantly switch conversion direction (e.g., kg to lb ↔ lb to kg)
• Prebuilt modes for common conversions like pounds to ounces or grams to carats
• Clear formulas and practical examples for each conversion type

Supported Conversions

Conversion	Formula	Example
Kilograms to Pounds	lb = kg × 2.20462	5 kg = 11.0231 lb
Kilograms to Grams	g = kg × 1000	2 kg = 2,000 g
Grams to Ounces	oz = g × 0.03527396	100 g = 3.5274 oz
Pounds to Ounces	oz = lb × 16	3 lb = 48 oz
Stones to Pounds	lb = st × 14	2 st = 28 lb
Pounds to Kilograms	kg = lb × 0.45359237	10 lb = 4.5359 kg
Ounces to Grams	g = oz × 28.3495	5 oz = 141.7475 g
Milligrams to Ounces	oz = mg × 0.00003527396	1000 mg = 0.0353 oz
Metric Tons to Pounds	lb = t × 2204.62	1 t = 2,204.62 lb
Carats to Grams	g = ct × 0.2	10 ct = 2 g
Carats to Ounces	oz = ct × 0.007055	50 ct = 0.3528 oz
Grams to Carats	ct = g × 5	4 g = 20 ct

The History and Definition of Weight Units

Metric System

• Kilogram (kg): The base unit of mass in the metric system. Officially defined by Planck’s constant, it’s equal to 1,000 grams.
• Gram (g): One-thousandth of a kilogram, commonly used for food ingredients, small objects, and scientific measurements.
• Metric Ton (t): Equal to 1,000 kilograms, used for very heavy items, shipping, and industrial measurements.
• Milligram (mg): One-thousandth of a gram, typically used for medication dosages and nutritional information.

Imperial & US Customary System

• Pound (lb): Defined as exactly 0.45359237 kilograms. The standard weight unit in the US and still commonly used in the UK.
• Ounce (oz): One-sixteenth of a pound (28.35 grams). Used for food portions, postal weights, and light items.
• Stone (st): Equal to 14 pounds (6.35 kg). Still widely used in the UK and Ireland for measuring body weight.

Specialized Units

• Carat (ct): Used for gemstones and equal to 0.2 grams. Originally derived from the weight of a carob seed, which was used as a counterweight in ancient scales.

Step-by-Step Conversion Examples

Kilograms to Pounds

• Formula: lb = kg × 2.20462
• Example: 75 kg = 165.3465 lb

Grams to Ounces

• Formula: oz = g × 0.03527396
• Example: 250 g = 8.8185 oz

Stones to Kilograms

• Formula: kg = st × 6.35029
• Example: 11 st = 69.8532 kg

Quick Approximations

• Kilograms to pounds: Multiply by 2.2 (e.g., 50 kg ≈ 110 lb)
• Pounds to kilograms: Divide by 2.2 (e.g., 22 lb ≈ 10 kg)
• Grams to ounces: Divide by 28 (e.g., 56 g ≈ 2 oz)
• Ounces to grams: Multiply by 28 (e.g., 4 oz ≈ 112 g)

How to Use the Converter

1. Enter a value (e.g., “75”)
2. Select a conversion mode (e.g., “Kilograms to Pounds”)
3. Click Convert to see the result
4. Use the ↔ Switch button to reverse the conversion direction
5. Try different conversion types for all your weight measurement needs