Converting to physical units

How do you convert from electronic to physical units?

Data acquisition systems measure a voltage in counts but you want the physical unit. A physical unit is acceleration (m/sec/sec), pressure (Pa), velocity (m/sec), displacement (m) etc.

Example: You measure 209500 counts but what acceleration does this equal? Say your accelerometer has a sensitivity of 0,4 volts/g and your ADC a sensitivity of 838000 counts/volt, what is the acceleration?

In your college physics class you learned to convert units this way:

Acceleration = Counts_Measured X volts/count X g/volt
Acceleration is in g's as the counts and volts cancel each there out leaving you with g's.

Here is the calculation with actual numbers:

g = 209500 X 1/838000 X 1/0,4 = 0,625 g