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.
Guía Completa de Conversión de Peso y Masa
Guía exhaustiva sobre medidas, conversiones y aplicaciones profesionales de peso y masa
Comprendiendo los Sistemas de Peso y Masa
Unidades Métricas (SI)
- •Kilogramo (kg) — unidad base del SI para la masa
- •Gramo (g) = 0,001 kg
- •Miligramo (mg) = 0,000001 kg
- •Tonelada métrica (t) = 1 000 kg
- •Microgramo (μg) = 0,000000001 kg
Sistema Imperial y Avoirdupois
- •Onza (oz) = 28,3495 g
- •Libra (lb) = 16 oz = 453,592 g
- •Piedra (stone) = 14 lb = 6,35 kg
- •Tonelada corta (EE. UU.) = 2 000 lb = 907,185 kg
- •Tonelada larga (Reino Unido) = 2 240 lb = 1 016,05 kg
Factores de Conversión Esenciales
Conversiones Métricas
- •1 kg = 1 000 g
- •1 g = 1 000 mg
- •1 tonelada métrica = 1 000 kg
- •1 mg = 1 000 μg
- •1 kg = 2,20462 lb
Conversiones Imperiales
- •1 lb = 16 oz
- •1 stone = 14 lb
- •1 tonelada EE. UU. = 2 000 lb
- •1 tonelada Reino Unido = 2 240 lb
- •1 oz = 28,3495 g
Sistemas Especializados
- •Onza troy = 31,1035 g (metales preciosos)
- •Libra troy = 12 onzas troy
- •Quilate = 0,2 g (gemas)
- •Grano = 64,799 mg (balas/medicina)
- •Tael = 37,5 g (comercio de Asia Oriental)
Aplicaciones Profesionales
Alimentación y Cocina
- •Escalado de recetas
- •Etiquetado nutricional (g por porción)
- •Precisión en repostería (harina, azúcar)
- •Control de porciones
- •Conversión de recetas internacionales (oz vs g)
Medicina y Farmacia
- •Dosificación de medicamentos en mg/kg de peso corporal
- •Preparación de fluidos intravenosos
- •Farmacia magistral
- •Monitoreo del peso del paciente
- •Cálculos de dosificación pediátrica
Envíos y Logística
- •Facturación de fletes por peso dimensional vs. real
- •Límites de peso postal
- •Manifiestos de carga
- •Declaraciones aduaneras
- •Inventario de almacén en kg/lb
Ciencia e Industria
- •Balanzas de laboratorio (precisión en μg)
- •Ensayos de materiales (resistencia a la tracción)
- •Metalurgia (composición de aleaciones en % en peso)
- •Minería (ensayo de minerales)
- •Agricultura (rendimiento por hectárea)
Buenas Prácticas en la Medición de Peso
Precisión en la Medición
- •Poner la balanza a cero/tara antes de medir
- •Usar la balanza adecuada para el rango de medición
- •Calibrar con pesas certificadas
- •Descontar el peso del recipiente
- •La temperatura afecta las balanzas de precisión
Distinción entre Masa y Peso
- •La masa (kg) es invariable
- •El peso es masa × gravedad (varía en la Luna/espacio)
- •Las balanzas miden peso y muestran masa asumiendo 9,81 m/s²
- •El peso corporal en kg es técnicamente masa
- •Los ingenieros distinguen cuidadosamente ambos conceptos
Ejemplos de Peso por Categoría
Objetos Cotidianos
- •Azúcar (1 taza) ≈ 200 g = 7,05 oz
- •Mantequilla (1 barra) = 113 g = 4 oz
- •Teléfono inteligente ≈ 175 g = 6,2 oz
- •Portátil ≈ 1,8 kg = 3,97 lb
- •Neumático de coche ≈ 10 kg = 22 lb
- •Persona adulta ≈ 70 kg = 154 lb
- •Bolsa de harina (5 lb) = 2,27 kg
Alimentación y Cocina
- •Filete 8 oz = 227 g
- •Porción de pasta 100 g = 3,53 oz
- •Pechuga de pollo 150 g = 5,29 oz
- •Manzana ≈ 182 g = 6,4 oz
- •Medida de fórmula infantil 8,5 g
- •Masa de pizza 250 g = 8,82 oz
- •Mantequilla 250 g = 8,82 oz
Industrial y Envíos
- •Coche ≈ 1 500 kg = 3 307 lb
- •Contenedor de carga (máx.) 28 000 kg
- •Carga de camión articulado 36 287 kg (80 000 lb)
- •Peso olímpico de lanzamiento 7,26 kg = 16 lb
- •Lingote de oro 12,4 kg = 400 oz troy
- •Tonelada de carbón = 1 000 kg
- •Elefante ≈ 5 000 kg