Colombia uses the International System of Units (SI). For visitors from countries that use the imperial system, it is important to note that distances are measured in kilometers, not miles. Height is measured in meters and centimeters, not feet and inches. Weight is expressed in kilograms and grams, not pounds and ounces. Road speed is given in kilometers per hour (km/h). Temperature is measured in degrees Celsius (°C), not Fahrenheit. This difference is especially relevant when checking weather forecasts or shopping for groceries.