Estimate rifle chamber pressure conversions between CUP and PSI in both directions, including kCUP, kpsi, MPa, and bar equivalents. CUP ↔ PSI Calculator Enter the pressure you have; CUP and PSI are different test methods, so the result is an estimate. CUP to PSI PSI to CUP CUP pressure CUPkCUP PSI pressure psikpsiMPabar Calculate Reset … Continue reading CUP ↔ PSI Calculator