CardBox Tools

Unit Converter

Convert between multiple units of measurement instantly. Length, weight, temperature, volume, and more. Perfect for students, engineers, and professionals.

⚡ Real-Time Conversion

See results instantly as you type. Convert multiple units simultaneously.

📊 Multiple Categories

Length, weight, temperature, volume, and many more measurement types.

🌍 Metric & Imperial

Convert between metric, imperial, and other unit systems worldwide.

Supported Unit Categories

📏 Length & Distance

  • • Millimeters, Centimeters, Meters
  • • Kilometers, Miles
  • • Feet, Inches, Yards
  • • Nautical Miles

⚖️ Weight & Mass

  • • Milligrams, Grams, Kilograms
  • • Ounces, Pounds, Stones
  • • Metric Tons, Short Tons
  • • Micrograms, Tons

🌡️ Temperature

  • • Celsius (°C)
  • • Fahrenheit (°F)
  • • Kelvin (K)
  • • Rankine (°R)

💧 Volume & Capacity

  • • Milliliters, Liters
  • • US/UK Gallons
  • • Cups, Tablespoons, Teaspoons
  • • Fluid Ounces, Pints

⚡ More Units

  • • Area (m², ft², acres)
  • • Speed (m/s, km/h, mph)
  • • Time conversions
  • • Energy & Power

Unit Converter

Convert between different units of measurement. Length, weight, temperature, and more.

Common Applications

✏️ Students & Education

Verify calculations for physics, chemistry, and mathematics homework. Convert units for science projects and experiments. Perfect for learning measurement systems.

👨‍🍳 Cooking & Recipes

Convert recipe measurements between metric and imperial units. Adjust ingredient quantities for different serving sizes. International recipe adaptation.

🏗️ Engineering & Construction

Convert measurements for construction projects, structural calculations, and design specifications. Work with different unit systems across regions.

✈️ Travel & Transportation

Convert distances for travel planning, speed conversions (mph to km/h), and temperature adjustments when traveling internationally.

💼 Business & Commerce

Convert measurements for international business, shipping calculations, and cross-border trading. Verify specifications in different unit systems.

🔬 Science & Research

Convert between various scientific units for research, experiments, and data analysis. Ensure accuracy in scientific calculations and publications.

Quick Reference Conversions

Popular Length Conversions

1 inch = 2.54 cm
1 foot = 0.3048 m
1 mile = 1.609 km
1 meter = 3.281 feet
1 km = 0.621 miles
1 yard = 0.914 m

Popular Weight Conversions

1 ounce = 28.35 grams
1 pound = 0.453 kg
1 kg = 2.205 pounds
1 stone = 6.35 kg
1 gram = 0.035 ounces
1 ton = 1000 kg

Temperature Conversion Formulas

Celsius to Fahrenheit: (°C × 9/5) + 32 = °F
Fahrenheit to Celsius: (°F - 32) × 5/9 = °C
Celsius to Kelvin: °C + 273.15 = K
Kelvin to Celsius: K - 273.15 = °C

Frequently Asked Questions

What's the difference between metric and imperial units?

Metric is the international decimal system (meters, kilograms, liters). Imperial is used mainly in US and UK (feet, pounds, gallons). Most countries use metric.

Why are there different temperature scales?

Celsius and Fahrenheit use different reference points for water. Kelvin is used in science and starts at absolute zero. Conversion between them requires specific formulas.

How accurate are the conversions?

Our converter uses standard conversion factors and provides high precision. Results are accurate for practical purposes in cooking, construction, and general use.

Can I convert between compound units?

Our tool handles single unit conversions. For complex conversions (like speed or density), convert each component separately or use the appropriate category.

What is the best converter for my use case?

For cooking, focus on volume and weight. For travel, use length and temperature. For engineering, use precise metric conversions. Our tool works for all scenarios.

Why Unit Conversion Matters

Global Communication

In our connected world, being able to convert between different measurement systems is essential for international communication and collaboration.

Accuracy & Precision

Mistakes in unit conversion can have serious consequences. A reliable converter ensures accuracy whether you're cooking, building, or conducting research.

Time Saving

Instead of looking up conversion factors manually, use our tool for instant results. Save time and reduce calculation errors.

Learning & Understanding

Understanding unit conversions helps you learn how different measurement systems work and their relationships to each other.