Improvements for first script?

[alloydog]

My way of learning is to think of something I need doing, then try a line, step by step, googling each error message and so on. I *don't* look for a complete script, that someone else has already done, to modify. I know it's re-inventing the wheel, but it works for me :)

Anyway, this is my first ever python script. It very simple, but it works. But, I'm just wondering if it is OK as it stands, or could it be a bit more elegant? I mean, would a grizzled old Python hack give a gentle nod of his head and say something like "Not bad, not bad. For a hardware engineer", or would he curl up in the corner, realising 2020 just got worse?...

EDIT: I know it needs things like making sure you can only input numeric values where they're required.

# Convert millivolts to engineering units
print ("4-20 mA to Engineering units convertor")
print ("")

def main():
    # Set engineering units and range
    measUnits = input("Enter the units of measurement: ")
    measMin = input("Enter the minimum measurement value: ")
    measMin2 = abs(float(measMin)) # removes "minus" bit
    measMax = input("Enter the maximum measurement value: ")
    measRange = float(measMin2) + float(measMax)
    print ("Measurement range is {} {}".format(measRange, measUnits))

    # Input measured value
    rawValue = input("Input mV value: ")

    # Calculate measured value
    step1 = float(rawValue) - 400
    step2 = step1 / 1600
    measValue = (step2 * measRange) - measMin2
    output = round(measValue,2)
    print ("Measured value is {} {}".format(output, measUnits))

main()

# Restart? yay or nay?
restart = input("Do you want to convert another value? Y/N: ")
if restart.lower() == 'y':
    main()
else:
    print ("Goodbye")