Conversion Calculators

Comprehensive unit conversion tools for length, weight, temperature, volume, currency, and many other measurements. Quick and accurate conversions for all your needs.

All Conversion Calculators

Length Converter

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Convert between inches, feet, meters, kilometers, miles and more.

Free Calculator

CM to Inches Converter

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Professional centimeters to inches converter with real-time calculation, fractional results, and comprehensive unit conversions.

Free Calculator

Weight Converter

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Convert between pounds, kilograms, ounces, grams and other weight units.

Free Calculator

Temperature Converter

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Convert between Celsius, Fahrenheit, Kelvin and other temperature scales.

Free Calculator

Volume Converter

Convert between liters, gallons, cups, fluid ounces and other volume units.

Free Calculator

Area Converter

Convert between square feet, square meters, acres and other area units.

Free Calculator

Speed Converter

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Convert between 25+ speed units including mph, km/h, m/s, knots, Mach numbers and more with real-time results.

Free Calculator

Pressure Converter

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Convert between 33+ pressure units including Pascal, PSI, bar, atmosphere, torr, mmHg, and more with real-time results across SI, Imperial, and specialized systems.

Free Calculator

Force Converter

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Convert between 30+ force units including newtons, pounds-force, kilonewtons, dynes, kips, and more with real-time results across SI, metric, imperial, and specialized systems.

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Acreage Calculator

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Calculate land area in acres, hectares, and square meters from width and length measurements. Professional real-time acreage calculator with price estimation.

Free Calculator

PPM Calculator

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Professional concentration unit converter with 6 units (PPM, PPB, PPT, percent, per mille, decimal). Real-time conversion, validation, quick presets, and comprehensive educational content.

Free Calculator

Quick Conversion Reference

Common Length Conversions

  • • 1 inch = 2.54 centimeters
  • • 1 foot = 12 inches = 30.48 cm
  • • 1 yard = 3 feet = 0.9144 meters
  • • 1 mile = 5,280 feet = 1.609 km
  • • 1 meter = 100 cm = 3.28 feet
  • • 1 kilometer = 1,000 m = 0.621 miles

Common Weight & Temperature

  • • 1 pound = 16 ounces = 0.4536 kg
  • • 1 kilogram = 2.2046 pounds
  • • 1 ton = 2,000 pounds = 907.2 kg
  • • °C to °F: (°C × 9/5) + 32
  • • °F to °C: (°F - 32) × 5/9
  • • Water freezes at 0°C (32°F)