Use this free ADS-B to AGL calculator to estimate the Above Ground Level altitude of any aircraft broadcasting ADS-B data. By combining METAR altimeter settings and your ground elevation, this tool makes it easy for drone pilots and aviation enthusiasts to convert barometric altitude to AGL. Whether you’re planning a safe drone flight or analyzing nearby traffic, this calculator gives you a fast and accurate reference.
ADS-B to AGL Calculator v3.0
Need your elevation manually? Find it here (in feet)
Disclaimer: This tool provides an estimated Above Ground Level (AGL) altitude based on publicly available ADS-B and METAR data. Accuracy may vary depending on local pressure, elevation precision, and system reporting delays. This calculator is for informational purposes only. No guarantees of accuracy are implied, and we assume no liability for use of this tool in operational decision-making.
🧠 What is ADS-B Altitude?
ADS-B broadcasts a barometric altitude, which is based on pressure settings from an altimeter. It doesn’t account for terrain or elevation, so it’s different from AGL (Above Ground Level) altitude, which is what drone pilots care about.
📡 Why Convert to AGL?
Drone pilots flying under Part 107 are responsible for maintaining situational awareness and avoiding manned aircraft. Understanding AGL altitude is crucial for safety, especially when aircraft fly at low levels in shared airspace.
🔎 How Does This Calculator Work?
This tool:
- Uses METAR altimeter settings from the nearest airport
- Accepts a barometric ADS-B altitude input
- Uses your ground elevation (manually or auto-detected)
- Outputs an estimated AGL value