=== Area === Square Meters Acres Ares Spanish Besana Spanish Fanega Hectares Square Feet Square Inches Square Yards === Longitud === Centimeters Meters Miles (Nautical) Miles (Statute) Palms Feet Inches Yards Spanish Vara === Volumen === Cubic Meters Cubic Feet Liters Gallons (Brit.) Gallons (US) Barrels (US dry) Barrels (US liq) Barrels (Petroleum) === Energia === Joules (Nm, Ws) BTU/sec Calories/hr Watts Horse Power (Elec.) === Velocidad === Meters/Second Km/Hour Miles/Hour (Statute) Feet/Second === Presion === Bar Atmosphere Dyne/Square Cm Inch of Mercury Mm of Mercury Kg/Square Cm KiloPascal Millibar N/m2 (Pascal) N/cm2 Pound Force/Sq Foot Pound Force/Sq Inch Torr
See this page in English