To find out how high above sea level you are, you can use several methods and tools:

• GPS-based websites and apps: Websites like whatismyelevation.com and whatismyelevation.net use the GPS data from your phone or device to determine your precise elevation above sea level. Your device receives signals from satellites, and by calculating the time it takes for these signals to reach you, it estimates your three-dimensional position including elevation. You can also enter any address or location to find its elevation

• Altimeter devices: An altimeter measures altitude by detecting atmospheric pressure changes. As you go higher, air pressure decreases, and the altimeter translates this into an elevation reading. Many smartphones have built-in barometers that function as altimeters, providing real-time elevation data even without internet access

• Elevation maps and tools: Online elevation maps allow you to visually explore the height of different locations above sea level. You can drag a pin or search for a place to see its elevation

• Apps: There are apps such as "My Altitude Altimeter" that use GPS and barometric data to give you your current elevation and altitude above sea level

Elevation is generally expressed in meters or feet above mean sea level (AMSL), which is a standardized reference based on historic sea level measurements

. In summary, to know your height above sea level right now, the easiest way is to use a GPS-enabled device or smartphone with an elevation app or visit an elevation website that uses your device’s location data to provide an accurate reading