CalcunautWeight Conversion
Weight Converter
Convert Weights
Convert between different weight units
Table of Contents
Interactive Weight Explorer
Explore Weight Scales
Visualize and compare different weight units
Drag the slider to see how the same weight is represented in different units.
Weight Conversion Formulas
Weight Conversion Formulas
Use these formulas to convert between different weight units
Kilograms Conversions:
- pounds = kilograms × 2.20462
- ounces = kilograms × 35.274
- stones = kilograms × 0.157473
Pounds Conversions:
- kilograms = pounds ÷ 2.20462
- ounces = pounds × 16
- stones = pounds ÷ 14
Ounces Conversions:
- kilograms = ounces ÷ 35.274
- pounds = ounces ÷ 16
- grams = ounces × 28.3495
Stones Conversions:
- kilograms = stones × 6.35029
- pounds = stones × 14
Grams Conversions:
- kilograms = grams ÷ 1000
- ounces = grams ÷ 28.3495
Weight Facts
The heaviest blue whale ever recorded weighed 190 tonnes, equivalent to about 30 adult elephants.
The weight of all ants on Earth is estimated to be equal to the weight of all humans.
The world's heaviest apple weighed 1.849 kg (4 lb 1 oz) and was grown in Japan.
The heaviest weight lifted by a human is 2,422 kg (5,340 lbs) in a back lift by Paul Anderson in 1957.
A Saturn V rocket, used in the Apollo missions, weighed about 2,800 tonnes at liftoff.
The average weight of a coffee bean is about 0.15 grams (0.0053 ounces).
Average Human Weight
| Unit | Male | Female |
|---|---|---|
| Kilograms | 80 | 70 |
| Pounds | 176 | 154 |
| Stones | 12.6 | 11 |
Note: These are approximate global averages and can vary significantly between different populations and regions.
Weight Comparisons
| Item | Kilograms | Pounds |
|---|---|---|
| Apple | 0.1 | 0.22 |
| House Cat | 4 | 8.8 |
| Adult Human (Average) | 75 | 165 |
| Grand Piano | 300 | 661 |
| Car (Midsize) | 1,500 | 3,307 |
| African Elephant | 6,000 | 13,228 |
| Blue Whale | 190,000 | 418,878 |
Note: These are approximate weights and may vary depending on specific examples or measurements.
Weight Knowledge Quiz
Question 1
How many grams are in a kilogram?
History of Weight Measurement
The Evolution of Measuring Weight
From ancient methods to modern standards
- Ancient civilizations used balance scales with standardized weights.
- The pound as a unit of weight dates back to ancient Roman times.
- The kilogram was originally defined as the mass of one liter of water at 4°C.
- In 1889, the International Prototype Kilogram (IPK) was created as the standard for mass.
- In 2019, the kilogram was redefined based on the Planck constant, a fundamental constant of nature.
Real-World Applications
Weight Conversion in Practice
How weight conversion is used in various fields
- Shipping and Logistics: Calculating shipping costs based on weight.
- Nutrition and Dieting: Converting between grams and ounces for food measurements.
- Sports: Weight classes in boxing, wrestling, and other combat sports.
- Medicine: Dosage calculations based on patient weight.
- Agriculture: Measuring crop yields and livestock weight.
Accuracy in Weight Measurement
Precision and Accuracy
Understanding the importance of accurate weight measurements
Accurate weight measurement is crucial in many fields, from scientific research to commerce. Here are some key points about accuracy:
- Precision refers to the consistency of measurements, while accuracy refers to how close a measurement is to the true value.
- Modern digital scales can measure weight with extreme precision, often to fractions of a gram.
- Environmental factors like temperature and humidity can affect weight measurements.
- Regular calibration of weighing instruments is essential for maintaining accuracy.
- In fields like pharmaceuticals and precious metals, even tiny weight measurement errors can have significant consequences.
Glossary of Weight Terms
- Kilogram (kg)
- The base unit of mass in the International System of Units (SI).
- Pound (lb)
- A unit of weight in the imperial and US customary systems, equal to 0.453592 kilograms.
- Ounce (oz)
- A unit of weight equal to 1/16 of a pound or approximately 28.35 grams.
- Stone (st)
- A unit of weight used in the UK and Ireland, equal to 14 pounds or approximately 6.35 kilograms.
- Metric Ton (t)
- A unit of weight equal to 1,000 kilograms or approximately 2,204.62 pounds.
- Carat (ct)
- A unit of weight used for gemstones, equal to 200 milligrams or 0.2 grams.