Expected supply current calculation for DRV8825

I'd like to theoretically calculate the average expected current draw for a basic DRV8825 stepper motor application, even if it is just an approximate estimate.

Suppose I have a 24V DC supply to the DRV8825, with ample bulk capacitance near the chip, and a bipolar stepper motor with a 2.5A max phase current rating and a phase resistance of 1.25 ohms.

Suppose I have 0.1 ohm current sense resistors and Vref set to 1V (identical configuration for both coils), giving a chopper current setpoint of 2.0A. I have the microstepping ratio mode set to 1/32, and I clock the step input for reasonably fast continuous rotation of the motor.

Given these sort of example conditions, how can I calculate an expected value for the current demand from the 24V supply?