Uncut Scuba / Tools
Scuba Tools
Dive-gas calculators for depth, SAC/RMV, nitrox, and trimix. Results show imperial and metric units. Blending figures are for planning and education only.
Core
ATA / Pressure at Depth
Convert between ATA, fsw, and msw, and read PPO2 and PPN2 of air at depth.
Open →SAC / RMV
Turn gas used, average depth, tank rating, and time into RMV and SAC rates.
Open →Tank Volume / Pressure
Find how much free gas is in a cylinder at its current pressure.
Open →Unit Conversions
Convert feet and meters, psi and bar, and cubic feet and litres.
Open →EANx
Best Mix / MOD / EAD
Find a best nitrox mix, its maximum operating depth, and equivalent air depth.
Open →EANx Mix Planning
Plan a partial-pressure nitrox fill from empty or from an existing mix, with oxygen cost.
Open →EANx Top Up / Bleed Down
Reach a target FO2 from the gas already in the cylinder, bleeding first when needed.
Open →EANx What-If Top Up
See the resulting mix if you top a cylinder with air or another gas.
Open →Trimix
Best Trimix
Get FO2, FHe, and FN2 from target depth, maximum PPO2, and END.
Open →Trimix Planning
Plan a partial-pressure trimix fill of helium, oxygen, and air, with gas cost.
Open →Trimix Top Up / Bleed Down
Reach a target trimix from the current fill, bleeding first when needed.
Open →Trimix What-If Top Up
See the resulting trimix if you top with air or a given gas.
Open →Heliair
Plan a helium-plus-air fill with no pure oxygen, including cost, MOD, and END.
Open →For planning and education only. These figures are not a substitute for proper training, certified gas blending, or analyzing every cylinder before use. Always verify mixes with a calibrated analyzer. Diving involves risk; use this tool at your own risk. Assumptions: seawater at 33 fsw / 10 msw per atmosphere; ideal-gas partial-pressure blending; air is 20.9% oxygen and 79.1% nitrogen; equivalent narcotic depth treats oxygen as narcotic and helium as not.