The acceleration rate due to gravity on Earth is approximately 9.81 meters per second squared (m/s²). This means that for every second an object falls, its downward velocity increases by 9.81 meters per second.

Here are some important things to note about this value:

* It's an average: This value varies slightly depending on factors like altitude and latitude.

* It's a constant: This value is constant regardless of the mass of the falling object.

* It's a vector: This value has both magnitude (9.81 m/s²) and direction (downwards).

It's also important to remember that this value is only for Earth. The acceleration due to gravity on other planets and celestial bodies will be different.