PIXEL RULER
Pixel (px) Ruler Online
A free online ruler in pixels — useful for design and development work where you need an exact on-screen pixel measurement.
Rough estimate · 96.0 PPI — calibrate for real accuracy
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Works best on a laptop or desktop with a mouse. On a phone, calibrate with a card or pick your exact model for the most accurate reading — auto-detect is a best guess.
Keyboard: C crosshair · A angle · D dark mode · F fullscreen · H hide controls · 1-4 units · Esc clear/close
More ruler units
Frequently asked questions
Does the pixel reading need calibration?
No — pixels are exact and don't depend on your screen's physical size, so the px reading is always precise regardless of calibration.
Can I switch to cm or inches?
Yes — tap cm or in at the top any time; those will use your calibrated PPI.