As noted by several 1 bar = 14.5 psi and
Bar is atmosphereic pressure at sea level; however,
most bar readings are taken from absolute, 0 bar = complete vacume= -14.5
psi
most PSI readings are from atmospheric, 0 psi = 1 bar
so bar to psi conversion would be, bar -1 x 14.5
and psi to bar, psi/14.5 +1
Dave G