The present application provides a method for speed estimation, device, electronic device, and storage medium, and relates to the technical field of rotational speed estimation. The method for speed estimation is applied to a three-phase brushless motor: firstly, acquire voltages of three terminals of a three-phase brushless motor; secondly, take the voltage difference value of each two terminals as an equivalent line voltage; thirdly, determine a virtual Hall signal according to a zero-crossing point of the equivalent line voltage; and lastly, estimate the rotational speed of the three-phase brushless motor according to the virtual Hall signal. The method for speed estimation, device, electronic device, and storage medium provided in the present application have the advantage of being simpler for rotational speed estimation.