We are working on an interactive calculator.Until it is ready it´s up to you. Everything you need is coherently explained below: >> Weight Conversion To Convert between lb and kg you need one of the following parameters: 1 lb ≙ 0,454 kg1 kg ≙ 2,204 lb Its really easy if you follow this example:> lb in kg: 155lb / 2,2 = 70,45kgand in reverse conclusion:> kg in lb: 70,45kg * 2,2 = 155lb Height Conversion The conversion between feet/inches and cm is a little bit more tricky.You will need the following parameters: 1in ≙ 2,54cm1ft ≙ 12in bzw. 30,48cm feet/inches can be converted into cm like this:> 5’9″ (5 feet 9 inches) > 5ft * 12in + 9in = 69in > 69in * 2,54cm = 175,26cmand in reverse conclusion:> 175,26cm / 2,54cm = 69in > 69in / 12 = 5,75ft > 5ft + 0,75 * 12in = 5ft 9in