Purchasing power parity, in economics, the exchange rate required to equalise the purchasing power of different currencies
Interest rate parity, in finance, the notion that the differential in interest rates between two countries is equal to the differential between the forward exchange rate and the spot exchange rate
Put–call parity, in financial mathematics, defines a relationship between the price of a European call option and a European put option
Parity (sports), an equal playing field for all participants, regardless of their economic circumstances
Potty parity, equalization of waiting times for males and females in restroom queues