Online measurements change from U.S. Standard Units to Metric Units. Primary transformations: Area change incorporates Square meters to square feet, Square feet to square meters. Temperature change incorporates Fahrenheit to Celsius degrees and Celsius to Fahrenheit degrees. Speed change incorporates Kilometers each hour to miles each hour, Miles each hour to kilometers each hour, Mass change incorporates Ounces to Kilogram, Kilograms to ounces, Ounces to grams and Grams to ounces, Ounces to pounds, Pounds to ounces, Kilograms to pounds, Pounds to kilograms, Grams to kilograms, Kilograms to grams,