Submarine Calculator · Pressure & Buoyancy Tool 2026
Calculate hydrostatic pressure at depth, buoyant force, and hull stress for submarines and underwater vehicles. Educational tool for marine engineering, physics students, and diving enthusiasts.
How it works: Enter depth, displaced volume, and water density. Get hydrostatic pressure, buoyant force, and hull stress estimate.
🎯 Why Use a Submarine Calculator?
Understanding the physics of underwater vehicles is crucial for marine engineers, submarine designers, and oceanographers. Our calculator applies hydrostatic pressure formula (P = ρgh), Archimedes' buoyancy principle (Fb = ρgV), and estimates hull stress for a spherical pressure hull. It's educational and practical for preliminary design. All calculations are client‑side and free.
📘 How to Use
- Enter depth in meters (e.g., 100).
- Enter displaced volume in cubic meters (submarine's volume).
- Optionally adjust water density (default 1025 kg/m³ for seawater).
- Click "Calculate" to get pressure (Pa, atm), buoyant force (N, tons), and hull stress (MPa).
✨ Features
⚙️ Formulas
Pressure = ρ × g × depth (g = 9.81). Buoyancy = ρ × g × volume. Hull stress for a thin‑walled sphere: σ = P × R / (2t), assuming R/t ratio typical. Here we estimate stress using a simplified model.
❓ FAQ
1. What is the crushing depth of a submarine?
Depends on hull material and design. Our tool gives an estimate.
2. Can I use this for diving?
Yes, pressure at depth is relevant for SCUBA.