Unit Converter

Length, weight, temperature and volume. Length: Meters (1), Kilometers (0.001), Centimeters (100), Miles (0.000621371), Feet (3.28084), Inches (39.3701). Weight: Kilograms (1), Grams (1000), Pounds (2.20462), Ounces (35.274). Volume: Liters (1), Milliliters (1000), US Gallons (0.264172), US Cups (4.22675), US Fl. Ounces (33.814). Temperature: °F = °C × 9/5 + 32; °C = (°F - 32) × 5/9; K = °C + 273.15. Calculation sequence: 1. Convert FROM value to base unit (Meters, Kilograms, Liters, Celsius); 2. Convert base unit to TO unit. HOW IT WORKS The avoirdupois ounce (~28.35 g) measures mass, while the fluid ounce (~29.57 ml) measures volume — same word, different unit systems. Validation: Value must be numeric; Empty value should probably default to 0 or show placeholder; Temperature allows negative values, other quantities should ideally restrict to non-negative.