Dash is designed to have a total supply of 18 million coins.
At present, the circulating supply of Dash is 7.4 million, and it will reach 18 million in the year 2300 (when none of us will be alive).
Dash has a variable block reward which decreases at a 7.1 % rate each year. The average block mining time is 2.5 minutes on the Dash blockchain, which makes it four times faster than Bitcoin.