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.
Guia Completo de Conversão de Peso e Massa
Guia abrangente sobre medidas, conversões e aplicações profissionais de peso e massa
Entendendo os Sistemas de Peso e Massa
Unidades Métricas (SI)
- •Quilograma (kg) — unidade base do SI para massa
- •Grama (g) = 0,001 kg
- •Miligrama (mg) = 0,000001 kg
- •Tonelada métrica (t) = 1 000 kg
- •Micrograma (μg) = 0,000000001 kg
Sistema Imperial e Avoirdupois
- •Onça (oz) = 28,3495 g
- •Libra (lb) = 16 oz = 453,592 g
- •Stone = 14 lb = 6,35 kg
- •Tonelada curta (EUA) = 2 000 lb = 907,185 kg
- •Tonelada longa (Reino Unido) = 2 240 lb = 1 016,05 kg
Fatores de Conversão Essenciais
Conversões 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
Conversões Imperiais
- •1 lb = 16 oz
- •1 stone = 14 lb
- •1 tonelada EUA = 2 000 lb
- •1 tonelada Reino Unido = 2 240 lb
- •1 oz = 28,3495 g
Sistemas Especializados
- •Onça troy = 31,1035 g (metais preciosos)
- •Libra troy = 12 onças troy
- •Quilate = 0,2 g (gemas)
- •Grão = 64,799 mg (balas/medicina)
- •Tael = 37,5 g (comércio do Leste Asiático)
Aplicações Profissionais
Alimentação e Culinária
- •Dimensionamento de receitas
- •Rotulagem nutricional (g por porção)
- •Precisão em confeitaria (farinha, açúcar)
- •Controle de porções
- •Conversão de receitas internacionais (oz vs g)
Medicina e Farmácia
- •Dosagem de medicamentos em mg/kg de peso corporal
- •Preparo de fluidos intravenosos
- •Farmácia de manipulação
- •Monitoramento do peso do paciente
- •Cálculos de dosagem pediátrica
Transporte e Logística
- •Faturamento de frete por peso dimensional vs. real
- •Limites de peso postal
- •Manifestos de carga
- •Declarações alfandegárias
- •Inventário de armazém em kg/lb
Ciência e Indústria
- •Balanças de laboratório (precisão em μg)
- •Ensaios de materiais (resistência à tração)
- •Metalurgia (composição de ligas em % em peso)
- •Mineração (ensaio de minério)
- •Agricultura (rendimento por hectare)
Boas Práticas na Medição de Peso
Precisão na Medição
- •Zerar/tarar a balança antes de medir
- •Usar a balança adequada para a faixa de medição
- •Calibrar com pesos certificados
- •Descontar o peso do recipiente
- •A temperatura afeta balanças de precisão
Distinção entre Massa e Peso
- •Massa (kg) é invariável
- •Peso é massa × gravidade (varia na Lua/espaço)
- •Balanças medem peso e exibem massa assumindo 9,81 m/s²
- •O peso corporal em kg é tecnicamente massa
- •Engenheiros fazem essa distinção com cuidado
Exemplos de Peso por Categoria
Objetos do Dia a Dia
- •Açúcar (1 xícara) ≈ 200 g = 7,05 oz
- •Manteiga (1 tablete) = 113 g = 4 oz
- •Smartphone ≈ 175 g = 6,2 oz
- •Notebook ≈ 1,8 kg = 3,97 lb
- •Pneu de carro ≈ 10 kg = 22 lb
- •Adulto ≈ 70 kg = 154 lb
- •Saco de farinha (5 lb) = 2,27 kg
Alimentação e Culinária
- •Bife 8 oz = 227 g
- •Porção de macarrão 100 g = 3,53 oz
- •Filé de frango 150 g = 5,29 oz
- •Maçã ≈ 182 g = 6,4 oz
- •Medida de fórmula infantil 8,5 g
- •Massa de pizza 250 g = 8,82 oz
- •Manteiga 250 g = 8,82 oz
Industrial e Transporte
- •Carro ≈ 1 500 kg = 3 307 lb
- •Contêiner de carga (máx.) 28 000 kg
- •Carga de caminhão 36 287 kg (80 000 lb)
- •Arremesso olímpico 7,26 kg = 16 lb
- •Barra de ouro 12,4 kg = 400 oz troy
- •Tonelada de carvão = 1 000 kg
- •Elefante ≈ 5 000 kg