Hover over any measurement on any web page and the conversion appears instantly — no clicks, no pop-ups, no math. It even decodes specs like USB-C power and battery capacity.
Most converters do mm → inches and stop. Hover Measure reads the context around a number — so a charger's wattage becomes a real charging spec, and a battery's mAh stays a capacity, not a meaningless energy figure.
Recognizes USB-C Power Delivery and shows the real charging profile (PD 3.1 EPR) — not 0.19 horsepower.
Knows battery capacity is capacity. Converts to amp-hours, not joules.
Reads whole dimension strings and converts every value in a single hover.
From everyday shopping to deep spec sheets — twelve categories, converted the instant your cursor lands.
Amazon, AliExpress, eBay, spec sheets, blogs — if it has a measurement, you can hover it.
Reads USB-C power, battery capacity and dimensions — not just raw unit math.
Every conversion runs locally. No account, no tracking, nothing leaves your browser.
Pick 0–3 decimal places and see exactly the level of detail you want.
Length, weight, volume, temperature, area, speed, pressure, power, data and more.
No clicks, no pop-ups, no copy-paste. Hover to see it, move on with your day.
| Hover Measure | Typical converter | |
|---|---|---|
| Convert on hover — no clicks | ✓ | Copy, paste, or type it in |
| Works inline on any web page | ✓ | Separate tab or popup |
| Understands specs (USB-PD, mAh) | ✓ | ✗ raw numbers only |
| Nothing leaves your browser | ✓ | Often ad-funded / tracked |
| Price | Free | Free with ads — or paid |
| Setup | 1 click | Bookmark or search each time |
One click to install. Free, no account, no setup screens.
Hover Measure quietly underlines measurements as you read.
Point at a spec and the conversion appears — instantly, in place.
If you compare gear across international listings — chargers, monitors, drones, 3D-printer parts, car parts, tools — the specs are in foreign units half the time. Hover Measure makes them make sense at a glance.
Yes — the core extension is free, with no account required. We may add an optional Pro tier later, but converting on hover stays free.
No. Every conversion runs locally in your browser. Hover Measure makes no network calls and has no analytics or tracking.
Any site. It reads the text on the page, so it works on marketplaces, spec sheets, articles and forums — anywhere measurements appear.
Length, weight, volume, temperature, area, speed, pressure, power, energy, data, battery capacity, and smart specs like USB-C Power Delivery.
No. It's lightweight, runs locally, and is carefully scoped inside its own shadow DOM so it never touches a page's own layout or styles.
Add Hover Measure to Chrome and never do mental math on a product page again.
Add to Chrome — Free