Water Pressure at Depth Calculator

Calculate hydrostatic pressure at any depth in water. Used in scuba diving, submarine engineering, and fluid mechanics.

Enter Your Measurements

Depth (m)

Fluid Density (kg/m³)

Results

Hydrostatic Pressure

100,553

Absolute Pressure

201,878

Absolute Pressure

29.3

psi

Absolute Pressure

1.99

atm

Formula

P = ρ × g × h | P_abs = P_hydrostatic + P_atm

How to Use This Calculator

How to Use

1
Enter depth in meters.
2
Enter fluid density (seawater ≈ 1025 kg/m³, freshwater ≈ 1000 kg/m³).
3
Get pressure in Pascals, psi, and atmospheres.

Frequently Asked Questions

How much pressure is at 10 meters?

At 10m seawater, hydrostatic pressure is about 1 atm, so absolute pressure is 2 atm (1 from water + 1 from atmosphere). This is why divers must decompress.

What is neutral buoyancy depth?

Neutral buoyancy depends on your buoyancy compensator, not depth directly. Pressure affects air volume in BCDs and lungs, changing buoyancy with depth.

Related Calculators

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Ideal Gas Law Calculator

About This Calculator

This calculator uses the formula: P = ρ × g × h | P_abs = P_hydrostatic + P_atm. All calculations follow industry-standard methods. Results are estimates — always verify with a licensed professional for structural or code-compliant work.

Built and maintained by the CalcSmart team. Last updated March 2026.

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