Weight Calculator
Convert weight between kilograms, pounds, ounces, grams, stones, and tons instantly. Perfect for cooking, shipping, fitness, and everyday weight conversions.
What is a Weight Calculator?
A weight calculator (or weight converter) is a tool that converts weight measurements between different units, such as kilograms, pounds, ounces, grams, stones, and tons. It's useful for cooking, shipping, fitness tracking, and any situation where you need to convert between weight systems.
This calculator supports six common weight units and provides instant, accurate conversions with customizable decimal precision.
How Does the Weight Calculator Work?
The calculator uses standard conversion factors:
Base Unit: Kilograms (kg)
1 kg = 2.20462 lb
1 kg = 35.274 oz
1 kg = 1000 g
1 kg = 0.157473 stone
1 kg = 0.00110231 ton (US)
All conversions are performed by first converting the input value to kilograms, then converting to the target unit.
Simply select the unit you're converting from, enter the value, choose the target unit, and the calculator will show you the result instantly.
Why Use This Weight Calculator?
- Six Units: Supports kilograms, pounds, ounces, grams, stones, and tons.
- All Conversions: Shows the value in all units, not just the target.
- Visual Comparison: A bar chart shows the relative weight in different units.
- Reference Chart: See how the weight compares across all units at a glance.
- Free & Private: No registration, no data storage.
Common Weight Conversions
- 1 kg to lbs: 1 kilogram = 2.20462 pounds
- 1 lb to kg: 1 pound = 0.453592 kilograms
- 1 oz to g: 1 ounce = 28.3495 grams
- 1 stone to kg: 1 stone = 6.35029 kilograms
- 1 ton to kg: 1 US ton = 907.185 kilograms
❓ Weight Calculator FAQ
How do I convert kilograms to pounds?
Multiply the number of kilograms by 2.20462. For example, 5 kg × 2.20462 = 11.0231 lb. This calculator does this conversion automatically.
How do I convert pounds to kilograms?
Divide the number of pounds by 2.20462. For example, 10 lb ÷ 2.20462 = 4.53592 kg. Our calculator handles this instantly.
What is the difference between a ton and a metric ton?
A US ton (also called a short ton) is 2,000 pounds or 907.185 kg. A metric ton (tonne) is 1,000 kg or 2,204.62 pounds. This calculator uses the US ton.
How many grams are in an ounce?
There are 28.3495 grams in one ounce (avoirdupois). This is the standard ounce used for weight measurements in the US.
What is a stone in weight measurement?
A stone is a British unit of weight equal to 14 pounds or 6.35029 kg. It is commonly used in the UK and Ireland for body weight.
How do I convert ounces to grams?
Multiply the number of ounces by 28.3495. For example, 8 oz × 28.3495 = 226.796 g. This calculator does this for you.
What is the difference between weight and mass?
Mass is the amount of matter in an object, measured in kilograms or grams. Weight is the force of gravity on that mass, measured in pounds or newtons. In everyday use, the terms are often used interchangeably.
How do I convert stones to pounds?
Multiply the number of stones by 14. For example, 10 stones × 14 = 140 pounds. Our calculator handles this conversion.
What is the avoirdupois system?
The avoirdupois system is a weight measurement system used in the United States and some other countries. It includes units like pounds (lb) and ounces (oz), with 16 ounces in a pound.
How do I convert pounds to ounces?
Multiply the number of pounds by 16. For example, 5 lb × 16 = 80 oz. This calculator shows this conversion automatically.
What is the difference between a fluid ounce and an ounce?
A fluid ounce (fl oz) measures volume, while an ounce (oz) measures weight or mass. They are not interchangeable. This calculator deals with weight ounces only.
How do I convert kilograms to stones?
Divide the number of kilograms by 6.35029. For example, 70 kg ÷ 6.35029 = 11.023 stones. Our calculator provides this conversion.
What is the weight of a US ton in pounds?
One US ton (short ton) equals 2,000 pounds. This is the standard ton used in the United States.
How do I convert grams to ounces?
Divide the number of grams by 28.3495. For example, 100 g ÷ 28.3495 = 3.5274 oz. This calculator does this automatically.
What is the metric system for weight?
The metric system uses kilograms (kg) as the base unit for mass, with grams (g) for smaller amounts and metric tons (tonnes) for larger amounts. It is the standard system used in most countries.
How do I convert pounds to stones?
Divide the number of pounds by 14. For example, 140 lb ÷ 14 = 10 stones. Our calculator handles this conversion.
What is the difference between a troy ounce and an avoirdupois ounce?
A troy ounce (31.1035 g) is used for precious metals like gold and silver. An avoirdupois ounce (28.3495 g) is used for everyday weight measurements. This calculator uses the avoirdupois ounce.
How do I use this weight calculator for cooking?
Select the unit your recipe uses (e.g., ounces), enter the amount, and select the unit you need (e.g., grams). The calculator will give you the exact conversion for your recipe.