Furnace Filter Sizes: Complete List
Every filter size we carry
Read the numbers on the edge of your old filter, then pick your thickness below.
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Can't read the numbers?
If the print has worn off, measure the filter itself with a tape. Width first, then length, then thickness.
Filter sizes are rounded off, and every brand does it. A filter sold as 16x25x1 really measures about 15 1/2 x 24 1/2 x 7/8. So round your measurement up to the nearest inch and you'll land on the right size.
Found your size? Here's what people ask next
- How often should I change it?
- What does the MERV number mean?
- MERV 8 or MERV 11, which one do I need?
- Which way does it go in?
- How do I change it?
Size list kept up to date.