Comprehensive unit conversion calculators for length, weight, temperature, volume, area, speed, pressure, energy, and more. Convert between metric, imperial, and international units instantly with precision accuracy trusted by engineers, scientists, and professionals worldwide.
From inches to centimeters, pounds to kilograms, convert any measurement in seconds.
Convert between inches, feet, meters, kilometers, miles and more.
Professional centimeters to inches converter with real-time calculation, fractional results, and comprehensive unit conversions.
Convert between pounds, kilograms, ounces, grams and other weight units.
Convert between Celsius, Fahrenheit, Kelvin and other temperature scales.
Convert between liters, gallons, cups, fluid ounces and other volume units.
Convert between square feet, square meters, acres and other area units.
Convert between 25+ speed units including mph, km/h, m/s, knots, Mach numbers and more with real-time results.
Convert between 33+ pressure units including Pascal, PSI, bar, atmosphere, torr, mmHg, and more with real-time results across SI, Imperial, and specialized systems.
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.
Calculate land area in acres, hectares, and square meters from width and length measurements. Professional real-time acreage calculator with price estimation.
Professional concentration unit converter with 6 units (PPM, PPB, PPT, percent, per mille, decimal). Real-time conversion, validation, quick presets, and comprehensive educational content.
💡 Engineer's Tip: Always double-check unit conversions in critical applications (construction, medicine, engineering). Use exact values for precision work, approximations for quick estimates. Remember: 1 inch = 25.4mm exactly, but 1 pound ≈ 0.45kg is close enough for everyday use. When traveling internationally, memorize a few key conversions: miles×1.6=km, lbs÷2.2=kg, °C×2+30≈°F.