A sewing machine from the UK can work in the US if you use a step-up transformer to convert the electricity from 110V/120V to 220V/240V. These voltage transformers convert the power into a different voltage so that your sewing machine can operate in the US without being damaged. On the other hand, a step-down transformer is needed if you need a lesser voltage. You will need a transformer to use a sewing machine manufactured in the US to work in the UK or most areas in Europe, Asia, or Africa. The work of a step-up or step-up transformer is simple. The transformer takes the supply voltage at a specific rating and converts it by decreasing or increasing it to provide the right volts to the machine. It is also important to consider the wattage of your appliance. Since you are going to use a machine from Europe in the US, you need to buy a step-up transformer with the same number of watts as your sewing machine. If the wattage is not the same as your machine, there is a risk of burning it out. Although this works in many sewing machines that need to convert electricity, it would be safer to check your manual for specific instructions to avoid damaging your machine. Some brands do not prefer their machines to be tampered with. However, you will not undergo all this trouble of looking for a transformer if your sewing machine is dual voltage. If your machine is dual voltage, you can look for a switch near a label that reads 110V/60Hz or 220V/50z. After switching the voltage, you can now sew and not worry about getting your motor burned or damaged.