How much a bottle of nitrous costs on average is about $50.
If your vehicle is not fully equipped yet, then the price for a full kit starts at about $700. However, if you’re buying and installing a bottle of nitrous, you’ll pay about $50. In most places, nitrous oxide sells for between $3.50 and $5 per pound.
Of course, bottle capacity, horsepower, and the size of the shot will affect how long a bottle lasts. You might get 10 quarter-mile runs out of a bottle—or less. One bottle may last you for one night of zooming around.
Hope this helps! Remember to get professional help installing your kit if you’re unfamiliar with the process.