Capacitance in mosfet is of three types:

gate capacitance

diffusion capacitance

routing capacitance

Gate capacitance: limits the speed of the device t which it can be operated

Diffusion capacitance: It is the capacitance due to charge carriers between drain and source.

Routing capacitance: It is the capacitance of the metal which is deposited on the top of oxide layer.

1. Transition capacitance

2. Diffusion capacitance

3. Space charge capacitance

4. Drift capacitance

stray capacitance calculation

Capacitance is an ability to store an electric charge.

"If we consider two same conductors as capacitor,the capacitance will be small even the conductors are close together for long time." this effect is called Stray Capacitance.

due to the load gates capacitance values,there is a increased load capacitance on the driving gate