Well, managed to get a result in excel, :-) but my conversion to "integer" math for PBP does not work, I've tried probably 40 different variations of the code below and am still not getting a result, :-(

The excel formula works as follows:

rho: 1.225 Air Density constant
Zo: 0.75 Zero Offset
Vs: 3260 Voltage supply
Vo: 1.2 Voltage out from sensor (Output from ADC)

Formula1 Dp=(Vs*(Vo/Vs)-Zo)
Formula 2 Mps=SQRT((2*Dp*1000)/rho)

However, translated into PBP I tried the following:

Code:
  rho = 1225        'Constant for pressure calc
  Zo = 74           'Zero Offset
  Vs1 = 3260        'Vref
    
  AD_in = 0
  Pres = 0
  volt = 0  
    for samples = 1 to 4      '4 Samples from AD - Sensor is low pass filtered
            ADCIN 4, ad_in
         volt = volt + ad_in
            Pause 25
     Next Samples
     volt = volt / 4          'Average AD
     
volt = volt * 3186            'convert to voltage out
Vind = DIV32 10000            'DIV32

'Excel Formula:
'Dp=(Vs*(Vo/Vs)-Zo)

dy_p = vind * 1000
Dy_p = (vind / Vs1)
dy_p = (dy_p * vind) / 1000
dy_p = dy_p - Zo

LCDOUT $FE, $80+6, dec2 dy_p, "    " 'output to first line

'Excel Formula:
'Mps=SQRT((2*Dp*1000)/rho)

Vmps = dy_p / 1000
vmps = vmps * 2 * 1000
vmps = vmps / (rho/1000)
vmps = sqr vmps

lcdout $FE, $C0+5, dec2 vind        'output to second line
Can anyone help steer me in the right direction? I tried using the DIV32 after the multipys but also then got some unexpected values.

Many Thanks
Rob