Hover Measure

About

Stop converting units in your head.

Hover Measure shows you the conversion the instant you hover over any measurement on any web page — no clicks, no pop-ups, no copy-paste, no mental math. Just point at a number and read the answer.

WHAT MAKES IT DIFFERENT
Most converters only do "mm to inches." Hover Measure reads the context around a number, so it understands specs:
• 140W on a charger → 28V @ 5A (USB-C PD 3.1 EPR) — the real charging profile
• 20,000mAh → 20Ah — battery capacity, kept as capacity
• 250×110mm → 9.84 × 4.33 in — whole dimension strings at once

WORKS EVERYWHERE, ON EVERYTHING
Amazon, AliExpress, eBay, spec sheets, recipes, articles, forums — if a page has a measurement, you can hover it. 60+ units across 12 categories: length, weight, volume, temperature, area, speed, pressure, power, energy, data, battery capacity, and USB-C Power Delivery.

PRIVATE BY DESIGN
Every conversion happens locally in your browser. No account, no sign-up, no analytics, no trackers — and nothing ever leaves your device. It's also carefully built inside its own shadow DOM, so it never interferes with a page's own layout or styles.

MADE FOR PEOPLE WHO SHOP BY THE NUMBERS
Electronics and chargers, makers and 3D printing, RC and drones, automotive and mechanics, tools, importers, engineers, and DIY — anyone comparing gear across international listings.

YOUR CONTROLS
• Adjustable precision (0–3 decimals)
• Light, dark, or system theme
• One-click on/off

Free. Install it, browse normally, and hover anything.