Ball pumping question

[Addo]

My old pump broke so I ordered new pump from eBay for ball pumping but the gauge measures pressure at mmHG.

Des anyone know how I can convert mmHG to HG because previously I ball pump between 3 to 5 HG. And I don't want to cause damage while pumping.

[Glacieron]

All I can say is google it

[SFBallpumper]

Millimeters of Mercury = mmHg
Inches of Mercury = inHg

Using info that you can find on Google, you can convert between the two, but without a measurement of height, Hg just means mercury. You need to know what unit of measurement (mm or in) your original pump used.

[TinyMe]

Divide by 25.4

So 101.6mmHg = 4inHg

[greenie]

25mm (2.5cm) = 1 inch

[Addo]

Thanks for the help everyone:)