Padi Dive Planner Calculator

PADI Planner Formula:

\[ T = \frac{\text{tank pressure} \times \text{tank volume}}{\text{RMV} \times \text{ATA}} \]

Tank Pressure:

bar

Tank Volume:

liters

Respiratory Minute Volume (RMV):

liters/min

Atmospheres Absolute (ATA):

ATA

Dive Time (T):

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1. What is the PADI Dive Planner Formula?

The PADI Dive Planner formula calculates the maximum dive time based on tank capacity, pressure, respiratory minute volume, and depth (expressed as atmospheres absolute). It helps divers plan safe dives within their air supply limits.

2. How Does the Calculator Work?

The calculator uses the PADI planner formula:

\[ T = \frac{\text{tank pressure} \times \text{tank volume}}{\text{RMV} \times \text{ATA}} \]

Where:

\( T \) — Dive time in minutes
\( \text{tank pressure} \) — Tank pressure in bar
\( \text{tank volume} \) — Tank volume in liters
\( \text{RMV} \) — Respiratory minute volume in liters/min
\( \text{ATA} \) — Atmospheres absolute (depth pressure)

Explanation: The formula calculates how long a diver's air supply will last based on consumption rate and depth pressure.

3. Importance of Dive Time Calculation

Details: Accurate dive time calculation is crucial for dive safety, preventing out-of-air situations, and proper dive planning. It helps divers stay within their no-decompression limits and air supply capacity.

4. Using the Calculator

Tips: Enter tank pressure in bar, tank volume in liters, RMV in liters/min, and ATA (1 for surface, increases with depth). All values must be valid positive numbers with ATA ≥ 1.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical RMV value for divers?
A: Average RMV is 15-25 liters/min at rest, but can increase to 40+ liters/min during exertion. It varies by individual and dive conditions.

Q2: How do I calculate ATA for different depths?
A: ATA = (depth in meters / 10) + 1 for salt water. For example, at 20 meters: (20/10) + 1 = 3 ATA.

Q3: Should I include a safety margin in my calculations?
A: Yes, always include a safety margin (typically 20-50 bar reserve) and plan to surface with adequate air remaining.

Q4: How does water temperature affect air consumption?
A: Cold water typically increases air consumption due to increased metabolic rate and potential stress.

Q5: Can this calculator be used for nitrox or other gas mixtures?
A: The formula works for any breathing gas, but remember that different mixtures have different maximum operating depths and no-decompression limits.