A combination calculator is a tool used to determine the number of possible combinations when selecting items from a set. It requires input of the total number of items in the set and the number of items to be selected. The calculator computes the number of combinations without replacement, where each item can only be selected once. This simplifies complex calculations, making it useful in fields such as probability, statistics, and combinatorics. To calculate combinations , visit Calculatoruniverse.com and get it done in two easy steps