Scuba Calculators
These calculators help you plan common parts of a dive without doing all the math by hand. Use them as planning tools, not as a substitute for understanding your limits.
MOD & EAD Calculator
Calculate maximum operating depth for common Nitrox mixes based on your chosen PO2 limit.
RMV Calculator
Estimate your surface breathing rate (RMV) from a known dive so you can plan future gas needs safely and more accurately.
Minimum Gas Reserve Calculator
Plan a realistic reserve so you and a buddy can ascend together from your planned depth with gas to spare.
Buoyancy and Weight Calculator
Rough in your starting weight based on exposure suit, tank choice, and salt or fresh water.