ATMs
Very common
Automatic teller machines (local names: ATM or الصرف الآلي) are very common in Saudi Arabia. You can find them in both large & small cities, tourist areas etc.
You do not need a chip & PIN card to use an ATM — your standard magnetic card will work fine.
Exchange rate
The exchange rate you'll get on an ATM is usually the best one you'll get. You’ll pay fees, but you’ll still get a better rate than you would exchanging cash at a bank or exchange booth.