A quick and easy tool to convert several units of measurement for temperature, weight, distance, area and volume. For example in weight conversion from US pounds / kg / grams / ounces to other units. In distance conversion from miles / km to other units. In area conversion from sq feet / sq meters to other units. In volume conversion from US gallons / liters / fluid ounces / milliliters to other units. It allows data entry by wheel or key board.