DPI may stand for

• Dots per inch, a measure of printing resolution
• Dhaka Polytechnic Institute, an educational institution of Bangladesh
• Deep packet inspection, a form of computer network packet filtering
• New South Wales Department of Primary Industries (NSW DPI), an Australian governmental unit
• Department of Public Information, related to U.N.
• Digital Program Insertion
• Disabled Peoples' International, an international non-governmental organization
• Disposable personal income
• Drawbar Pull Index, a measure of how much force a vehicle (agricultural tractor) can pull.
• Dry powder inhaler, a drug delivery device
• Dual Polarisation Interferometry
• Dye penetrant inspection, a Nondestructive testing method
• Days Post Infection, common abbreviation in the treatment of infections.
• SystemVerilog DPI (Direct Programming Interface)
• Distributed over Paid-In, in Private Equity, the ratio between the amount distributed by a partnership and the contributed amount

Dots per inch (DPI, or dpi) is a measure of spatial printing or video dot density, in particular the number of individual dots that can be placed in a line within the span of 1 inch (2.54 cm).