Weight Converter
Convert between different weight and mass units instantly
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About Weight Conversion
Our weight converter supports all common units including pounds, kilograms, ounces, grams, stones, and tons. Perfect for cooking, shipping, fitness tracking, and scientific calculations.
Common Weight Conversions
- 1 pound = 16 ounces = 453.592 grams
- 1 kilogram = 1,000 grams = 2.205 pounds
- 1 ounce = 28.35 grams
- 1 stone = 14 pounds = 6.35 kilograms
- 1 ton = 2,000 pounds = 907.185 kilograms
Weight Converter – Instantly Convert Kilograms, Pounds, Ounces, and More
Whether you're cooking a recipe from another country, tracking your weight for fitness, or shipping a package internationally, unit conversions can get confusing fast. Our makes it effortless to switch between kilograms, pounds, grams, ounces, stones, and tons — with accurate results in seconds.
Supported Weight Units
Metric System
- • Milligrams (mg)
- • Grams (g)
- • Kilograms (kg)
- • Metric Tons (t)
Imperial System
- • Ounces (oz)
- • Pounds (lbs)
- • Stones (st)
- • US Tons
Common Weight Conversion Equivalents
• 1 pound = 16 ounces = 453.592 grams
• 1 kilogram = 1,000 grams = 2.205 pounds
• 1 ounce = 28.35 grams
• 1 stone = 14 pounds = 6.35 kilograms
Real-Life Use Cases
🍳 Cooking & Baking
Converting recipe ingredients from grams to ounces or pounds to kilograms for international recipes.
💪 Fitness Tracking
Converting body weight between pounds and kilograms for gym equipment or health records.
📦 Shipping & Logistics
Converting package weights for international shipping rates and customs declarations.
✈️ Travel
Converting luggage weight limits between pounds and kilograms for different airlines.
🔬 Science & Lab Work
Converting measurements for scientific experiments and chemical calculations.
🏪 Retail & Commerce
Converting product weights for international sales and inventory management.
Weight Conversion Formulas
Pounds to Kilograms: kg = lbs ÷ 2.205
Kilograms to Pounds: lbs = kg × 2.205
Ounces to Grams: g = oz × 28.35
Grams to Ounces: oz = g ÷ 28.35
Imperial vs Metric Weight Systems
Metric System
Used by most countries worldwide. Based on powers of 10, making calculations easier.
Countries: Europe, Asia, Africa, South America, Australia
Imperial System
Primarily used in the United States and UK. Based on historical measurements.
Countries: United States, Myanmar, Liberia (partial)
Fitness Weight Examples
Common Body Weights
- • 120 lbs = 54.4 kg
- • 150 lbs = 68.0 kg
- • 180 lbs = 81.6 kg
- • 200 lbs = 90.7 kg
Gym Equipment Weights
- • 45 lbs = 20.4 kg (Olympic barbell)
- • 25 lbs = 11.3 kg (standard plate)
- • 10 lbs = 4.5 kg (light dumbbell)
- • 50 lbs = 22.7 kg (heavy dumbbell)
Why Our Weight Converter Stands Out
Frequently Asked Questions
How many grams are in a pound?
There are exactly 453.592 grams in one pound. This is the standard conversion used worldwide.
What countries use stones for weight?
Stones are primarily used in the United Kingdom and Ireland for measuring body weight. One stone equals 14 pounds or 6.35 kilograms.
Is there a difference between mass and weight?
Technically yes — mass is the amount of matter, while weight is the force of gravity on that mass. However, for everyday conversions, the terms are used interchangeably.
How accurate are online weight converters?
Our uses precise mathematical formulas and provides accuracy to multiple decimal places, suitable for most practical applications.
Ready to Convert Weights?
Use our free weight converter to get instant, accurate results for any weight conversion.
Converting between different weight units doesn't have to be complicated. With our , you can quickly switch between kilograms, pounds, ounces, grams, stones, and tons with confidence. Whether you're following an international recipe, tracking fitness progress, or handling shipping logistics, accurate weight conversion is just a click away.
Complete Weight & Mass Conversion Guide
Comprehensive guide to weight and mass measurements, conversions, and professional applications
Understanding Weight & Mass Systems
Metric (SI) Units
- •Kilogram (kg) — the SI base unit of mass
- •Gram (g) = 0.001 kg
- •Milligram (mg) = 0.000001 kg
- •Metric ton (t) = 1,000 kg
- •Microgram (μg) = 0.000000001 kg
Imperial & Avoirdupois
- •Ounce (oz) = 28.3495 g
- •Pound (lb) = 16 oz = 453.592 g
- •Stone = 14 lb = 6.35 kg
- •US short ton = 2,000 lb = 907.185 kg
- •UK long ton = 2,240 lb = 1,016.05 kg
Essential Conversion Factors
Metric Conversions
- •1 kg = 1,000 g
- •1 g = 1,000 mg
- •1 metric ton = 1,000 kg
- •1 mg = 1,000 μg
- •1 kg = 2.20462 lb
Imperial Conversions
- •1 lb = 16 oz
- •1 stone = 14 lb
- •1 US ton = 2,000 lb
- •1 UK ton = 2,240 lb
- •1 oz = 28.3495 g
Specialized Systems
- •Troy oz = 31.1035 g (precious metals)
- •Troy lb = 12 troy oz
- •Carat = 0.2 g (gemstones)
- •Grain = 64.799 mg (bullets/medicine)
- •Tael = 37.5 g (East Asian trade)
Professional Applications
Food & Cooking
- •Recipe scaling
- •Nutritional labeling (g per serving)
- •Baking precision (flour, sugar)
- •Portion control
- •International recipe conversion (oz vs g)
Medicine & Pharmacy
- •Drug dosing in mg/kg body weight
- •IV fluid preparation
- •Compounding pharmacy
- •Patient weight monitoring
- •Pediatric dosing calculations
Shipping & Logistics
- •Freight billing by dimensional vs actual weight
- •Postal weight limits
- •Cargo manifests
- •Customs declarations
- •Warehouse inventory by kg/lb
Science & Industry
- •Laboratory balances (μg precision)
- •Materials testing (tensile strength specimens)
- •Metallurgy (alloy composition by weight %)
- •Mining (ore assay)
- •Agriculture (yield per hectare)
Weight Measurement Best Practices
Measurement Accuracy
- •Zero/tare scale before measuring
- •Use appropriate scale for range
- •Calibrate with certified weights
- •Account for container weight
- •Temperature affects precision balances
Mass vs. Weight Distinction
- •Mass (kg) is invariant
- •Weight is mass × gravity (varies on Moon/space)
- •Scales measure weight, display mass assuming 9.81 m/s²
- •Body weight in kg is technically mass
- •Engineers distinguish carefully
Weight Examples by Category
Everyday Items
- •Sugar (1 cup) ≈ 200 g = 7.05 oz
- •Butter (1 stick) = 113 g = 4 oz
- •Smartphone ≈ 175 g = 6.2 oz
- •Laptop ≈ 1.8 kg = 3.97 lb
- •Car tire ≈ 10 kg = 22 lb
- •Adult person ≈ 70 kg = 154 lb
- •Bag of flour (5 lb) = 2.27 kg
Food & Cooking
- •Steak 8 oz = 227 g
- •Pasta serving 100 g = 3.53 oz
- •Chicken breast 150 g = 5.29 oz
- •Apple ≈ 182 g = 6.4 oz
- •Baby formula scoop 8.5 g
- •Pizza dough 250 g = 8.82 oz
- •Butter 250 g = 8.82 oz
Industrial & Shipping
- •Car ≈ 1,500 kg = 3,307 lb
- •Shipping container (max) 28,000 kg
- •Semi-truck load 36,287 kg (80,000 lb)
- •Olympic shot put 7.26 kg = 16 lb
- •Gold bar 12.4 kg = 400 troy oz
- •Coal ton = 1,000 kg
- •Elephant ≈ 5,000 kg