Free Online Unit Converter Tools

Convert between different units instantly with our accurate and easy-to-use calculators. Perfect for students, professionals, and everyday use.

25+ Converters
1M+ Conversions
100% Free

📏 Length Converters

Feet to Centimeters

Convert feet to cm for height, room measurements, and more

Inches to Centimeters

Convert inches to cm for precise measurements

Meters to Feet

Convert meters to feet for construction and sports

Miles to Kilometers

Convert miles to km for distance and travel

⚖️ Weight Converters

Kilograms to Pounds

Convert kg to lbs for body weight and shipping

Ounces to Grams

Convert ounces to grams for cooking and jewelry

Stones to Kilograms

Convert stones to kg for body weight measurements

Tons to Kilograms

Convert tons to kg for heavy weights

🌡️ Temperature Converters

Celsius to Fahrenheit

Convert °C to °F for weather and cooking

Fahrenheit to Celsius

Convert °F to °C for international use

Kelvin to Celsius

Convert K to °C for scientific calculations

Rankine to Fahrenheit

Convert °R to °F for engineering applications

🥤 Volume Converters

Gallons to Liters

Convert gallons to liters for fuel and liquids

Cups to Milliliters

Convert cups to ml for cooking and baking

Pints to Liters

Convert pints to liters for beverages

Fluid Ounces to ML

Convert fl oz to ml for recipes and medicine

Expert Resources & References

Our conversion tools are based on internationally recognized standards and scientific principles.

Scientific Standards

Our conversion formulas follow the International System of Units (SI) as defined by the International Bureau of Weights and Measures.

Academic Research

Conversion methodologies validated by NIST's Reference on Constants, Units, and Uncertainty.

Educational Resources

Learn more about measurement systems from Khan Academy's educational materials on units and measurement.

Why Choose Universal Converter Hub?

⚡

Lightning Fast

Instant conversions with real-time calculations as you type

🎯

100% Accurate

Precise calculations using official conversion formulas

📱

Mobile Friendly

Works perfectly on all devices - desktop, tablet, and mobile

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Completely Free

No registration required, unlimited conversions for everyone