Screen Size and Dimensions Helper
Convert between millimeter dimensions and display diagonal, check the closest standard aspect ratio, and match your measurements against sourced models in the device catalog. Geometry only: this tool computes screen dimensions, and never protector cut dimensions.
Measure the active display area, edge to edge of the lit glass, and enter width and height in millimeters.
Screen dimensions are the device’s active display area, not protector cut dimensions. Cut sizes depend on bezel geometry and adhesive design and are confirmed with the supplier before production.
Frequently asked questions
How do I measure my device screen?
Measure the active display area, not the bezel: width and height in millimeters, straight edge to straight edge of the lit glass. Enter both numbers in the width-and-height mode above and the tool computes the diagonal and the closest standard aspect ratio.
Is the diagonal the protector size?
No. The diagonal describes the display. A screen protector is cut to the active area with allowances for bezels, corner rounding, sensors, and adhesive design, so cut dimensions are device-specific. Cut sizes are confirmed with the supplier before production.
Why do my measurements match no model, or several?
Catalog dimensions are rounded, and nearby models can share an active area. Matches within 2 mm on both dimensions are likely matches; open the device page to compare the sourced dimensions. If nothing matches, the model may not be verified in the catalog yet.
Cite or embed this tool
Canonical URL
https://www.screenprotector.org/tools/screen-size
Citation line
ScreenProtector.org Research, Screen Size and Dimensions Helper, screenprotector.org/tools/screen-size, data refreshed 2026-09-05.
Short attribution
Source: ScreenProtector.org, Screen Size and Dimensions Helper, 2026-09-05
Free to reuse with attribution and a followable link to the canonical URL. Do not modify the figures or tool outputs. The tool and its data refresh with the device dataset (2026-09-05); cite the canonical version so your readers always see current output.
More free tools for fleet screen protection: all ScreenProtector.org tools.