Range Hood Filter Sizes: How to Measure Yours
Range hood filters aren’t sold under a searchable model number the way fridge or HVAC filters are — dimensions and filter type are what actually determine fit. This guide shows the typical size ranges for each filter type and exactly how to measure your own before ordering a replacement.
Common Range Hood Filter Sizes
| Filter Type | Typical Size Range | Notes |
|---|---|---|
| Aluminum mesh grease | 10″–20″ wide × 12″–18″ long | Washable, not typically replaced on a size-driven schedule |
| Stainless steel baffle grease | 10″–20″ wide × 12″–18″ long | Washable, same general size range as mesh |
| Square charcoal | 8″–12″ per side (cut-to-fit up to 15″×18″) | Not washable — replace on a schedule, not by wear |
| Round charcoal | 6″–8″ diameter | Not washable |
| Solid block charcoal | 10″–14″ wide × 5″–8″ thick | Not washable |
These are typical ranges, not a guarantee for every model — always measure your own filter before ordering. Cut-to-fit universal aluminum mesh sheets exist specifically for openings that fall outside standard pre-cut sizes.
How to Measure Your Range Hood Filter
Measure the filter panel itself, not the housing opening it sits in — panels are often slightly smaller than the housing to allow room for the mounting clips.
- Turn off the range hood and let it cool if it was recently in use.
- Release the grease filter — most slide out or unclip from the underside of the hood without tools.
- Lay the filter flat and measure its length and width with a tape measure, rounding up to the nearest half inch.
- If your hood is ductless (recirculating), locate the charcoal filter behind or above the grease filter and measure it separately — note whether it’s square, round, or a solid block, since the shape changes what you’re measuring (side length, diameter, or thickness).
- Compare your measurements against the size table above to identify the closest standard size, or confirm you’ll need a cut-to-fit universal filter instead.
When Your Filter Doesn’t Match a Standard Size
Universal cut-to-fit charcoal filters exist specifically for this — some are rated to trim down from openings as large as 15″ x 18″, covering well over 1,000 individual filter-size listings across brands. If your exact model isn’t listed anywhere, a cut-to-fit universal filter is a legitimate fallback, not a compromise. The same logic applies to aluminum mesh grease filters, which are commonly sold as trimmable sheets for non-standard openings.
Not sure whether you have a grease or charcoal filter, or need help identifying your exact type first? Start with the Range Hood Filter Replacement Guide. Ready to swap the filter once you’ve confirmed your size? See How to Replace a Range Hood Filter.
Frequently Asked Questions
What size is my range hood filter?
It depends on your filter type and hood size — grease filters typically run 10″–20″ wide by 12″–18″ long, while charcoal filters vary more by shape (roughly 8″–12″ per side for square, 6″–8″ diameter for round). The only reliable way to know your exact size is to measure your own filter directly, since the same hood model has sometimes shipped with different filter sizes across production years.
Do I measure the filter or the opening it sits in?
Measure the filter panel itself, not the housing opening. Panels are often cut slightly smaller than the housing to leave room for the mounting clips or slides, so measuring the opening can give you a size that’s larger than the actual filter you need.
What if my filter isn’t a standard size?
Range hood filters are less standardized across brands than refrigerator or HVAC filters. If your measurements don’t match a common size, a cut-to-fit universal filter — aluminum mesh sheets or trimmable charcoal panels — is a legitimate option rather than a compromise, and covers most openings up to roughly 15″ x 18″.
Are grease and charcoal filter sizes the same?
No. They’re different filters serving different purposes, and their size conventions differ too — grease filters are measured by length and width, while charcoal filters are measured by side length (square), diameter (round), or width and thickness (solid block), depending on shape. Measure each one separately if your hood uses both.
Sizing data on this page is drawn from FilterFitNow’s own already-verified range hood filter guide — cross-referenced against manufacturer sizing documentation and independent retailer charts.