In 1 atmosphere [atm] [standard] there is 1.01325 bar [b].

atmosphere [atm] [standard] atmosphere [atm] [technical] bar [b] barye [CGS] foot of mercury [fthg] gram / square foot [gf / ft²] gram / square inch [gf / in²] gram / square meter [gf / m²] inch of mercury [inhg] kip-force / square foot [kf / ft²] kip-force / square inch [ksi] kip-force / square meter [kf / m²] meter of mercury [mHg] pascal [pa] pièze [pz] pound / square foot [psf] pound / square inch [psi] pound / square meter [pf / m3] poundal / square foot [pdl / ft²] poundal / square inch [pdl / in²] poundal / square meter [pdl / m3] pound-force / square foot [psf] pound-force / square inch [psi] pound-force / square meter [pf / m3] tonne / square foot [short] torr [torr]

atmosphere [atm] [standard] atmosphere [atm] [technical] bar [b] barye [CGS] foot of mercury [fthg] gram / square foot [gf / ft²] gram / square inch [gf / in²] gram / square meter [gf / m²] inch of mercury [inhg] kip-force / square foot [kf / ft²] kip-force / square inch [ksi] kip-force / square meter [kf / m²] meter of mercury [mHg] pascal [pa] pièze [pz] pound / square foot [psf] pound / square inch [psi] pound / square meter [pf / m3] poundal / square foot [pdl / ft²] poundal / square inch [pdl / in²] poundal / square meter [pdl / m3] pound-force / square foot [psf] pound-force / square inch [psi] pound-force / square meter [pf / m3] tonne / square foot [short] torr [torr]