Scuba Diving
Calculators for scuba divers: nitrox maximum operating depth, equivalent air depth, best mix, oxygen partial pressure and air consumption, with the dive formulas shown.
Best Nitrox Mix Calculator
Find the richest nitrox mix for a planned depth in metres or feet. Enter your target depth and ppO2 limit to get the best oxygen percentage for the dive.
Equivalent Air Depth Calculator
Convert a nitrox dive to its equivalent air depth in metres or feet. Enter the oxygen percentage and depth to read the EAD for table and computer planning.
Nitrox MOD Calculator
Find the maximum operating depth of any nitrox mix in metres and feet. Set the oxygen percentage and your ppO2 limit, default 1.4 ata. Free planning aid.
Oxygen Partial Pressure Calculator
Calculate the oxygen partial pressure of a dive gas at depth in metres or feet. Enter the oxygen percentage and depth to check the ppO2 against the 1.4 limit.
Scuba Air Consumption Calculator
Work out your surface air consumption rate from a dive. Enter start and end pressure, time and depth to get a SAC rate in psi or bar per minute for planning.