About this calculator

SAC (bar/min) = tank pressure used ÷ minutes ÷ (avg depth m /10 + 1). RMV (L/min) = SAC × tank volume. A relaxed diver breathes 15–20 L/min at the surface; 25+ suggests trim or stress. Always surface with ≥ 50 bar reserve.

Frequently asked questions

What does the Scuba SAC / Gas Planning do?

Surface Air Consumption and remaining bottom time from tank size, depth and SAC rate. SAC (bar/min) = tank pressure used ÷ minutes ÷ (avg depth m /10 + 1). RMV (L/min) = SAC × tank volume. A relaxed diver breathes 15–20 L/min at the surface; 25+ suggests trim or stress. Always surface with ≥ 50 bar reserve.

Is the Scuba SAC / Gas Planning free to use?

Yes. Every calculator on Calcurly.com is free, works in your browser without sign-up, and can be embedded on your own website.

How accurate is the Scuba SAC / Gas Planning?

Results are calculated in real time using industry-standard formulas. Treat the output as a well-informed estimate — always cross-check with local regulations, product datasheets, or a qualified scuba diving professional before committing to a purchase or a job.

What inputs does the Scuba SAC / Gas Planning need?

Enter values for: Tank volume (L), Start pressure (bar), End pressure (bar), Average depth (m), Dive length (min). Sensible defaults are pre-filled where possible so you can start with a single change.

Can I embed the Scuba SAC / Gas Planning on my own website?

Yes — copy the iframe snippet at the bottom of this page, or use the Embed Generator to customise the size. The embedded version stays in sync with the live calculator on Calcurly.com.