Echo Tape — Sonar Tape Measure

Echo Tape brings sonar technology to your phone through a simple browser tool. Point your device at a wall or object, tap the button, and it emits an inaudible ultrasonic pulse. The browser listens for the echo bouncing back and calculates the distance using the time delay. It's a fast, hands-free way to measure without a physical tape measure—no signup, no app install, and your measurements never leave your device.

This acoustic ranging tool works by sending ultrasonic sound waves that human ears can't hear, then measuring how long the echo takes to return. Your phone's speaker produces the pulse and the microphone captures the reflection. The distance calculation happens instantly in your browser, giving you quick estimates for room dimensions, furniture placement, or any measurement task you need without digging for a traditional tape measure.

Echo Tape is completely free and requires nothing but your phone and a web browser. Since it runs entirely in-browser, there's no data collection, no accounts to create, and no privacy concerns. The acoustic method works best with solid surfaces like walls and is a practical alternative when you don't have a measuring tape handy.