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