It's 110ppi, which is the most common display PPI still. Keep in mind 1440p is a family of resolutions, not a single resolution. In this case this monitor is 51

It's 110ppi, which is the most common display PPI still. Keep in mind 1440p is a family of resolutions, not a single resolution. In this case this monitor is 5120x1440, which is twice the resolution of the most common 1440p resolution (2560x1440).