Convert between different units of measurement instantly. Length, weight, temperature, area, volume, and more. Perfect for students, engineers, professionals, and everyday use.
Quick reference for the most commonly used unit conversions in daily life, work, and education.
Our comprehensive unit converter covers all major measurement categories used in science, engineering, construction, cooking, and daily life.
Metric: Millimeters, Centimeters, Meters, Kilometers
Imperial: Inches, Feet, Yards, Miles
Uses: Construction, engineering, sports, travel planning
Metric: Grams, Kilograms, Tons
Imperial: Ounces, Pounds, Stones
Uses: Cooking, shipping, fitness, medical applications
Scales: Celsius, Fahrenheit, Kelvin, Rankine
Uses: Weather, cooking, scientific research, HVAC systems
Metric: Square meters, Hectares, Square kilometers
Imperial: Square feet, Acres, Square miles
Uses: Real estate, agriculture, land surveying
Metric: Milliliters, Liters, Cubic meters
Imperial: Fluid ounces, Cups, Gallons
Uses: Cooking, fuel consumption, container sizing
Energy: Joules, Calories, BTU, kWh
Power: Watts, Horsepower
Uses: Electrical systems, nutrition, heating systems
Understanding the mathematical relationships between different units helps in manual calculations and verification.
Unit conversion is essential in various fields and everyday situations. Here are practical applications across different domains.
Converting architectural drawings between metric and imperial units, calculating material quantities, structural load calculations.
Recipe conversions between cups and grams, temperature settings for ovens, scaling recipes for different serving sizes.
Fuel efficiency calculations (MPG to L/100km), engine specifications, tire pressure measurements.
Physics problems, chemistry calculations, geography projects, international standard conversions.
Shipping weights and dimensions, product specifications, customs documentation, quality standards.
Medicine dosage calculations, patient weight/height measurements, medical equipment specifications.
Understanding the differences between metric and imperial systems helps in choosing the right measurement system for your needs.
| Aspect | Metric System | Imperial System |
|---|---|---|
| Origin | France, 1795 | Britain, evolved over centuries |
| Base Unit (Length) | Meter | Foot |
| Base Unit (Weight) | Kilogram | Pound |
| Conversion Factor | Powers of 10 | Varied (12, 16, 3, etc.) |
| Global Usage | 195+ countries | USA, Myanmar, Liberia |
| Scientific Use | Universal standard | Limited to specific regions |
Follow these best practices to ensure precise and reliable unit conversions in your work and studies.
Use appropriate decimal places based on the accuracy required. Engineering may need 4-6 decimals, cooking needs 1-2.
Verify conversion factors from reliable sources. Small errors in factors can lead to significant mistakes in results.
Online converters eliminate human error in calculations and provide instant, accurate results for complex conversions.
Consider the measurement's purpose. Scientific measurements need higher precision than everyday estimates.
Use multiple sources or methods to verify important conversions, especially for critical applications.
Memorize frequently used conversion factors for quick mental calculations and error detection.
Almost all countries use the metric system. Only the United States, Myanmar, and Liberia primarily use imperial units for everyday measurements.
Use the formula: °F = (°C × 9/5) + 32. For example, 20°C = (20 × 9/5) + 32 = 68°F.
Mass is the amount of matter (measured in kg), while weight is the force of gravity on that mass (measured in Newtons). In everyday use, they're often used interchangeably.
Some conversions are exact (like 1 meter = 100 centimeters), while others are approximations (like 1 inch = 2.54 cm by definition).
It depends on your needs. Engineering typically uses 3-6 decimals, cooking uses 1-2, and scientific work may require even more precision.
Use our comprehensive unit converter for accurate, instant conversions across all measurement categories.