Documentation Formula "db =" Doesn't Seem to Work

Edit:
The unit converter floats db to VCAdb including "(EXP)" give different results, there is no unit converter for GUI.
to
The unit converter floats db to VCAdb does give accurate results, but there is no unit converter for GUI.

I took a look and the application is the other way, db to volts.

I'm avoiding 3rd party modules as much as possible unless absolutely necessary, for many reasons. So far I haven't used any, but I'm still on page 1.

The float function should be able to handle this, but I just can't find the right inverse function of the exponetial "10 * 10 ^ ( db / 20 )", Mathway.com tells me its "20log(x)−20" but the product on google (my windows calculator is broken) is:
"(20 log(-90)) - 20 = 19.0848502 + 27.2875271 i"

google doesn't compute:
"20log(0)−20"
I imagine it's because the multiplication is by zero.

Not quite sure what to do with that first 20.
I've modified the formula in several ways to land on either end of the scale but the closest I can get is:
10+log(10)(X / 10);

10+log(10)(-90 / 10) = 1
10+log(10)(0 / 10) =10

Oddly enough, upon entering the formula, the output stays locked into 20.723.

Just about ready to break out paper and pencil an solve for:
f−1(x)=10 * 10 ^ ( y / 20 )
manually.

I'll give it another hour of brute force, try to unlock that 20.723, or throw something else at it.