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 |
