7. FAQ's and Knowledgebase / Filtration

What size filter paper do I need for my funnel?

How do you choose the right size filter paper for your funnel? Use the table below to see what size filter paper you should use

gravity filtration

Gravity filtration using a filter paper inside a filtration funnel is used to remove precipitates from a liquid. The remaining liquid is known as the filtrate.

For standard shaped filter funnels where the walls are at 58 or 60° the table below shows the right size of filter paper for the funnel

Diameter of funnel (mm)   Diameter of filter paper required (mm)
35 55
45 70
55 90
65 110
75 125
90 150
100 185
160 240
180 320
220 400
260 500

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