All Unit Converters

Browse our complete collection of 74+ free unit converters organized by category. Convert length, weight, volume, temperature, engineering units, and much more instantly.

All converters are completely free, require no registration, and provide instant, accurate results.

Common Converters

Essential unit conversions for everyday use including length, weight, volume, temperature, and more.

Engineering Converters

Specialized converters for engineering applications including velocity, acceleration, density, and torque.

Heat Converters

Thermal property conversions for heat transfer, conductivity, thermal resistance, and temperature-related measurements.

Fluids Converters

Fluid mechanics conversions including flow rate, viscosity, concentration, and surface tension.

Light Converters

Optical and lighting converters for luminance, illumination, electromagnetic wavelength, and image resolution.

Electricity Converters

Electrical property conversions for charge, current, resistance, capacitance, and conductivity.

Magnetism Converters

Magnetic property conversions for flux, field strength, and magnetic force.

Radiology Converters

Radiation measurement conversions for activity, exposure, and absorbed dose.