Unit Converter

Welcome to Converter Express! Choose from our collection of precision unit converters below. Each converter provides accurate results with up to 10 decimal places precision.

🔨

Hardness Converter

Convert between material hardness scales, using ASTM E140 12b tables, including Vickers, Brinell, Rockwell, and Shore for materials testing.

HV HB HRC HRB HRA Shore A Shore D

💨

Pressure Converter

Convert between Pascal, Bar, PSI, Atmosphere, and other pressure units for engineering use.

Pa kPa MPa bar mbar atm Torr mmHg PSI KSI PSF kgf/cm² mH2O

🌡️

Temperature Converter

Convert between Celsius, Fahrenheit, Kelvin, and Rankine. Perfect for scientific and cooking use.

°C °F K °R

📏

Distance Converter

Convert between metric and imperial distance units like meters, kilometers, feet, and miles.

m km cm mm in ft yd mi

🧪

Volume Converter

Convert between liters, gallons (US/UK), cubic meters, and milliliters for any volume measurement.

L mL gal(US) gal(UK) m³ cm³

📐

Angle Converter

Convert between radians and degrees with high precision for mathematical and engineering work.

rad °

🎵

Frequency Converter

Convert between Hertz and Beats Per Minute (BPM) for audio, music, and biological applications.

Hz kHz MHz GHz BPM