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) | 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 |