Echo Tape — Sonar Tape Measure
Point your phone at a wall and tap: it chirps an inaudible pulse, listens for the echo, and reads back the distance. Acoustic ranging in a browser.
Sonar needs mic + speaker access
Aim the phone's bottom edge straight at a hard flat wall, then tap Ping.
≈ · ± spread
Emits a faint high-pitched chirp — keep the room quiet.
Every phone has a small delay between its speaker firing and its mic hearing it. Lay the phone face-down flat on a table (or hold it a known distance from a wall), then calibrate so that delay is subtracted from your readings.
Not yet calibrated — readings use a default latency estimate and may be off by several cm.
More pings = steadier reading but takes longer.
Sound travels faster in warm air — this refines the distance.
🎯 How accurate is this? Acoustic ranging in a browser is genuinely hard and approximate — expect a few cm of error at best, and it can fail entirely on soft, angled or distant surfaces. Best results: a quiet room, a hard flat wall roughly 0.3–4 m away, phone speaker pointed straight at it, and a fresh calibration. All audio is processed on-device — nothing is uploaded.
Why you’ll love Echo Tape — Sonar Tape Measure
Instant & free
No signup, no paywall, no limits — Echo Tape — Sonar Tape Measure works the moment the page loads.
Completely private
Everything runs in your browser. Nothing you enter is ever uploaded or stored on a server.
Works on any device
Fully responsive and touch-friendly — use it on your phone, tablet or desktop.
Uses your real device
Taps into your actual camera, mic or motion sensors — right in the browser.
How to use it
Open it
No download and no login — the tool is ready right at the top of this page.
Use it
Enter your details or start interacting. Everything updates live as you go.
Get your result
Copy, download or share your result in a single tap. That’s it.
Frequently asked questions
Echo Tape — Sonar Tape Measure is 100% free — no signup, no watermarks and no usage limits. It’s one of 200+ free tools we build and give away.
No. All sensor data is processed live on your device and never leaves it or gets stored.
Completely. Echo Tape — Sonar Tape Measure runs entirely in your browser (client-side). Nothing you type, upload or generate is sent to our servers, so your data never leaves your device.
No. It works instantly in any modern web browser — Chrome, Safari, Edge or Firefox — on desktop and mobile. You can even install this site as an app.
Yes. The tool is fully responsive and touch-friendly, so it works great on phones and tablets as well as computers.
Workaholic Developers — a software & AI studio. We built Echo Tape — Sonar Tape Measure (and 200+ other free tools) to show what we can do. Need something custom built? We’d love to help.
More Device Tools
From our collection of 248 free tools.
We built this. We can build yours.
Echo Tape — Sonar Tape Measure is one of 200+ free tools from Workaholic Developers — a software & AI studio. Need a website, app, AI agent or automation? Let’s talk.
🇮🇳 Built by Workaholic Developers
We built this little toy in days. Imagine what we’ll build for you.
AI agents, web apps, automation, custom tools — designed and engineered fast, on whatever tech fits the job. If you can describe it, we can build it.