Weight & Mass Converter

32 units

Convert between different units of weight and mass with precision and ease. From milligrams to tons, our comprehensive weight converter handles all your measurement needs.

Popular Weight Conversions

Pounds to Kilograms

Convert lbs to kg for international sizing

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Kilograms to Pounds

Convert kg to lbs for fitness tracking

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Ounces to Grams

Convert oz to grams for cooking and recipes

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Grams to Ounces

Convert grams to oz for baking precision

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Universal Weight Converter

Convert between any weight units with precision accuracy

Popular Weight Unit Conversions

Most commonly used weight conversions in daily life and professional applications

Kilogram to Pound Conversions

1 kg2.20 lbs
5 kg11.02 lbs
10 kg22.05 lbs
25 kg55.12 lbs
50 kg110.23 lbs
100 kg220.46 lbs

Pound to Kilogram Conversions

1 lb0.45 kg
5 lbs2.27 kg
10 lbs4.54 kg
25 lbs11.34 kg
50 lbs22.68 kg
100 lbs45.36 kg

Gram to Ounce Conversions

1 g0.035 oz
10 g0.353 oz
25 g0.882 oz
50 g1.764 oz
100 g3.527 oz
500 g17.637 oz

Ounce to Gram Conversions

0.5 oz14.17 g
1 oz28.35 g
2 oz56.70 g
4 oz113.40 g
8 oz226.80 g
16 oz453.59 g

Metric Ton to Pound Conversions

0.1 t220.46 lbs
0.5 t1,102.31 lbs
1 t2,204.62 lbs
2 t4,409.24 lbs
5 t11,023.11 lbs
10 t22,046.23 lbs

Stone to Kilogram Conversions

1 st6.35 kg
2 st12.70 kg
5 st31.75 kg
8 st50.80 kg
10 st63.50 kg
15 st95.25 kg
Complete Weight and Mass Conversion Guide

Comprehensive guide to understanding weight and mass measurements across all systems

Understanding Weight and Mass Measurement

Weight and mass are fundamental measurements used across science, commerce, health, and daily life. Mass represents the amount of matter in an object, while weight is the gravitational force acting on that mass. In practical applications, these terms are often used interchangeably, though they have distinct scientific meanings.

Essential Conversion Factors

  • 1 Kilogram = 2.20462 Pounds = 35.274 Ounces
  • 1 Pound = 0.453592 Kilograms = 16 Ounces
  • 1 Metric Ton = 1,000 Kilograms = 2,204.62 Pounds
  • 1 Stone = 14 Pounds = 6.35029 Kilograms
  • 1 Ounce = 28.3495 Grams

International Weight Standards

Metric System (SI Units)

  • Kilogram (kg) - Base unit
  • Gram (g) - 1/1000 kg
  • Metric ton (t) - 1000 kg
  • Used globally for science and trade

Imperial System

  • Pound (lb) - Primary unit
  • Ounce (oz) - 1/16 pound
  • Stone (st) - 14 pounds (UK)
  • Ton - 2000 lbs (US) or 2240 lbs (UK)

Professional Applications

Medical and Health

  • Body weight tracking
  • Medication dosing
  • Nutrition calculations
  • Medical equipment specs

Manufacturing and Industry

  • Material quantities
  • Shipping weights
  • Quality control
  • Production planning

Agriculture and Food

  • Crop yields
  • Ingredient measurements
  • Livestock weights
  • Food packaging

Common Weight Values and Examples

Everyday Items

  • Standard paperclip: 1 gram
  • Smartphone: 150-200 grams
  • Bag of sugar: 1 kg (2.2 lbs)
  • Gallon of water: 3.8 kg (8.3 lbs)
  • Car tire: 10-15 kg (22-33 lbs)
  • Small car: 1,200 kg (2,650 lbs)

Human Body Weights

  • Newborn baby: 3.5 kg (7.7 lbs)
  • Average adult human: 70 kg (154 lbs)
  • Professional athlete: 80-90 kg (176-198 lbs)
  • Brain weight: 1.4 kg (3.1 lbs)
  • Heart weight: 300 g (10.6 oz)
  • Liver weight: 1.5 kg (3.3 lbs)

Regional Weight Systems

United States

  • Predominantly pounds and ounces
  • Short ton (2,000 lbs) for large weights
  • Grains for bullets and medicine
  • Troy ounces for precious metals

United Kingdom

  • Stone and pounds for body weight
  • Long ton (2,240 lbs) for shipping
  • Metric system for most commerce
  • Imperial units still common

Scientific Standard

The scientific community universally uses the metric system (kg, g, mg) for all weight and mass measurements. This ensures consistency in research, international collaboration, and data sharing across all scientific disciplines.

Precision and Accuracy in Weight Conversion

Different applications require different levels of precision in weight conversions. Medical dosing requires exact conversions to prevent errors, while shipping calculations may use rounded values for practical purposes. Our converter provides both standard (2 decimal places) and precise (6 decimal places) options to meet various professional needs.

Important Note

When working with precious metals, remember that troy ounces are different from regular ounces. One troy ounce equals 1.097 regular ounces (31.1g vs 28.35g). This distinction is crucial for accurate precious metal trading and jewelry work.

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