Read the first five numbers (4 white and 1 black) from the left of the seven number bar gauge. Subtract the numbers corresponding to the last read date on your last water bill and multiply the difference by 100. That is the consumption in gallons since the last read date (assuming that it was an actual and accurate reading).

The numbers around the circumference of the dial are gallons with 1/10 gallon increments. For purposes of determining your usage since your last billing the red hand is irrelevant. The red triangle measures the rate of usage. When it is not moving no water is being used and the faster it moves the greater the current usage.