About divecalc
divecalc calculates what a dive with nitrox or trimix needs before you get wet: the best mix and the maximum depth of a gas, the oxygen pressure, the equivalent air depth, how to blend a fill, how much gas the dive takes, and a full decompression plan. On this website and in the app for iOS and Android, free of charge.
The results are no substitute for training, a dive computer or common sense. Check them against a second source before you dive with them; see the legal notice.
Who is behind it
divecalc is a private project of Stephan Mathys, a technical diver from Switzerland. It sells nothing. Visitors without an account see ads; with a free account there are none. Voluntary contributions help to pay for the server.
Contact
A question, an idea, or a result that looks wrong? Write to your buddy: buddy@divecalc.ch.