Start here / PADI RDP
Interactive Recreational Dive Planner
Click the preview to open the full-screen table, then follow the colored highlights through your selections.
PADI RDP / Imperial
How to use it
- Front: click your depth, then your bottom time. Yellow highlights depth; blue highlights the pressure-group row.
- Surface interval: enter minutes or click a printed interval range. Pink highlights the resulting group; clicking a range also flips to the back.
- Back: choose the next depth, then Save & add second dive. Your group carries forward; earlier highlights fade. Repeat for more dives.
- Review & reset: open saved dives to review or edit. Editing removes later dives. Clear current highlights keeps earlier dives; Start over clears the plan. Use + / − to zoom.
Use with your PADI training and the complete table instructions. This educational planning aid uses the imperial air tables for no-decompression dives. Check every plan against your training, the original instructions and your dive computer.
Open original PDFNitrox / Quick calculation
Equivalent Air Depth Calculator
Compare the nitrogen partial pressure of nitrox with air at an equivalent depth.
The numbers / explained
Ready when you are.
Start with the example or enter your own numbers, then calculate.
Every result includes units. All calculations run in your browser.
The calculation
How it works
EAD = [(1 − oxygen fraction) ÷ 0.79] × (actual depth + 33) − 33, in feet; use 10 in meters. Negative theoretical values are shown as zero for a surface-depth comparison.
Reference: NOAA diving formulas ↗Before you use it
Keep in mind
Sea-level seawater, nitrogen/oxygen mixtures only. EAD addresses nitrogen, not oxygen toxicity, and is not an MOD or dive-time limit. Follow your table's next-deeper-depth rules or a correctly configured nitrox computer.