Bernoulli Equation Pressure Calculator
Reviewed by Hamza Gujjar, Algorithm Architect & Software Developer
Last updated: July 26, 2026Bernoulli Equation Pressure Calculator
Bernoulli's equation captures a simple trade-off along any streamline: where a fluid speeds up, pressure drops, and where it slows down, pressure recovers.
The Formula
P2 = P1 + 0.5 × ρ × (v1² - v2²)
Worked Example
Water at 200 kPa flowing at 2 m/s accelerates to 5 m/s: P2 = 200 + 0.5 × 1000 × (4-25)/1000 = 189.5 kPa - pressure drops as velocity increases.
How to Use This Calculator
- Enter upstream pressure, fluid density, and upstream velocity.
- Enter downstream velocity.
Assumption: this version assumes no elevation change and no friction losses between the two points - real systems need additional loss terms for a fully accurate result.