Calculate hydraulic brake line pressure from pedal force, pedal ratio, and master cylinder bore size.
Input Parameters
Results
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Input Force to MC
lbs
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MC Piston Area
in²
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Line Pressure
psi
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Line Pressure
bar
Note: Typical vacuum boosters provide a 3:1 to 4:1 force multiplication. Master cylinder bore directly affects pedal feel and line pressure.
Reference
Input Force = Pedal Force x Pedal Ratio x Booster Ratio
MC Piston Area = pi x (Bore / 2)²
Line Pressure = Input Force / MC Piston Area
1 psi = 0.0689476 bar
Typical line pressure: 800-1500 psi