Free Online Unit Converter

Convert length, weight, temperature, volume, and number systems instantly. Every conversion includes the formula, a reference table, and worked examples — completely free, no sign-up required.

CM → Inches KG → LBS °C → °F KM → Miles Meters → Feet CM → Feet L → Gallons Hex → Dec

All Converters

📏 Length Conversion

View all Length →

⚖️ Weight Conversion

🌡️ Temperature Conversion

🧪 Volume Conversion

🔢 Number Systems Conversion

Why Use MetrykConverter?

MetrykConverter is a free online unit converter built for speed and accuracy. Convert between metric and imperial units for length (cm to inches, meters to feet, km to miles), weight (kg to lbs), temperature (Celsius to Fahrenheit), volume (liters to gallons), and number systems (hex to decimal) — all in one place.

Every converter page includes the mathematical formula, a conversion table with common values, worked examples, and answers to frequently asked questions. Whether you're a student, engineer, traveler, or just need a quick answer, you'll find it here.

Pages load in under half a second on any device. No sign-ups, no app downloads, no ads blocking your result. Just type a number and get an instant, accurate conversion — with the knowledge to understand how it works.