Coffee Filters
Pantry & Food Storage · 9 specs
Direct Answer
Coffee filters standardize conical and flat-bottom geometries. Cone filters span #1 (single cup) to #4 (standard 8–12 cup home drip), flat-bottom basket filters feature a 3.25" base, and Chemex bonded filters provide 20–30% greater paper density to trap cafestol oils.
Source: Specialty Coffee Association (SCA) / Filter Paper Industry Standards · Last reviewed Aug 28, 2026
Specs
| Governing Standards | SCA Equipment Standards / ISO Paper Filtration Standards |
| #1 Cone Filter | 1-Cup pour-over | Height: 3.5" (8.9 cm) | Base: 2.0" (5.1 cm) |
| #2 Cone Filter | 2 to 6-Cup drip / V60 02 | Height: 4.0" (10.2 cm) | Top: 4.25" (10.8 cm) |
| #4 Cone Filter | 8 to 12-Cup automatic drip | Height: 4.75" (12.1 cm) | Top: 7.5" (19.1 cm) |
| #6 Cone Filter | 10 to 14-Cup large manual drip | Height: 5.5" (14.0 cm) | Top: 8.5" (21.6 cm) |
| Standard Basket Filter (8–12 Cup) | Base: 3.25" (8.3 cm) | Side Wall Height: 2.25" (5.7 cm) | Fluted circumference |
| Small Basket Filter (4–6 Cup) | Base: 2.75" (7.0 cm) | Side Wall Height: 2.0" (5.1 cm) |
| AeroPress Round Filter | Circular Disc: 2.50 inches (63.5 mm) diameter |
| Chemex Bonded Filter | 20–30% heavier specialty paper (50–60 GSM) trapping diterpenes (cafestol) |
Coffee Filter Format & Compatibility Matrix
| Filter Type & Number | Format Geometry | Base / Height Dimensions | Machine & Brewer Compatibility |
|---|---|---|---|
| #1 Cone | Conical (V-Shape) | 2.0" base × 3.5" height | Single-cup manual drip cones, compact personal brewers |
| #2 Cone | Conical (V-Shape) | 2.5" base × 4.0" height | 4–6 cup automatic drip machines, Hario V60-02, Melitta 2–6 cup |
| #4 Cone | Conical (V-Shape) | 2.75" base × 4.75" height | Universal home drip benchmark: 8–12 cup automatic drip machines |
| #6 Cone | Conical (V-Shape) | 3.0" base × 5.5" height | 10–14 cup large manual pour-over cones & commercial brewers |
| 8–12 Cup Basket | Flat Bottom (Fluted) | 3.25" base × 2.25" wall | Standard flat-bottom basket drip machines (Mr. Coffee, Bunn) |
| AeroPress Disc | Flat Circular Disc | 2.5" (63.5 mm) diameter | AeroPress and AeroPress Go coffee makers |
| Chemex Bonded | Square / Circular Fold | 11.5" flat diameter | Chemex 6, 8, and 10-Cup classic pour-over glass carafes |