How much PSI does one pump from a bicycle pump output?

Question

I would like it to be as close to exact as possible, and no estimates from people who are clueless about this stuff please! (No offense because that's mostly everyone!)

Answer 1

Buy a $5 pressure gauge.

Answer 2

A bike pump doesn't pump pressure, it pumps air into a tyre which increases the pressure.

The volume of air pumped depends upon the size of the pump.

The pressure increase in the tyre per pump depends on the volume of the tyre and the volume of air just pumped in.

Therefore there is no hard and fast answer to this question. You can however estimate the increase in pressure per pump, by knowing the pressure at the start, the pressure at the end and the number of pumps you gave. The formula being:

(pressure end - pressure start) / number of pumps

However not many bike pumps have pressure gauges, but car pumps normally do.