The right rubber foot keeps equipment still, quiet and off the floor without wobbling. Use this guide to replace a lost foot exactly, or to size feet for something new. For every diameter in one table see the rubber feet size chart.
How to measure an old rubber foot
- Diameter: across the widest part of the base (the part that touches the floor).
- Height: from the floor to the surface it mounts against, not counting any stud.
- Mounting: a screw through a recessed metal washer, a threaded stud or insert (measure the thread, see the threaded feet guide), or a push-in stem (measure the hole it goes into, see push-in feet).
- Screw hole and recess: the hole the screw passes through, and the opening the screw head sits in.
If the old foot is squashed, round its height up to the next size: rubber takes a permanent set after years under load.
Size by weight (rule of thumb)
Bigger feet spread the load, protect soft floors and stay put. These ranges assume four feet of standard 60-durometer rubber; for motors and compressors that shake, also see vibration mounts.
| Total weight | Typical items | Foot diameter | Foot height |
|---|---|---|---|
| Under 5 lb | Electronics, small boxes, knife blocks | 1/2"–3/4" | 1/4"–3/8" |
| 5–25 lb | Cutting boards, desk fans, pedalboards, small amps | 3/4"–1" | 3/8"–5/8" |
| 25–75 lb | Speaker cabinets, mini fridges, bench grinders | 1"–1-1/2" | 1/2"–3/4" |
| 75–200 lb | Compressors, generators, furniture, tool chests | 1-1/2"–2-1/2" | 5/8"–1" |
| Over 200 lb | Job boxes, machinery, trailer ramps | 2-1/2"–3-3/16" or vibration mounts | 1"–2" |
Screw hole to screw size
Recessed feet have a metal washer molded in so the screw can be tightened without tearing the rubber. Use the largest screw that passes through the hole, with a head that fits the recess:
| Screw hole | Screw to use |
|---|---|
| 1/8" | #4 screw |
| 5/32" | #6 screw |
| 3/16" | #8 screw |
| 7/32" | #10 screw |
| 1/4" | #12 screw |
| 5/16" | 1/4" screw or bolt |
| 3/8" | 5/16" bolt or lag screw |
In-stock screw-on rubber feet with dimensions
Shop by style: recessed feet with metal washer · adjustable leveling feet · push-in feet · appliance feet · furniture feet.
FAQ
What size rubber feet do I need?
Match the old foot if you are replacing one: measure its diameter, height and the screw or stem. For a new project, size by weight: about 3/4"–1" feet for items up to 25 lb, 1"–1-1/2" up to 75 lb and 1-1/2" or larger above that, always using at least four feet.
How tall should rubber feet be?
Tall enough to clear cords, vents and screw heads underneath, but no taller than the foot is wide, so the item does not rock. Taller feet absorb more vibration; shorter feet are steadier.
What screw do I use for rubber feet with a metal washer?
Pick a screw that passes through the screw hole and has a head smaller than the recess, so it sits below the rubber surface. A 3/16" hole takes a #8 screw; a 1/4" hole takes a #12; a 3/8" hole takes a 5/16" bolt or lag screw.
How many rubber feet should I use?
Four for anything rectangular, one near each corner. Add a fifth or sixth along the middle of long items (over about 3 ft) so the panel does not sag between feet.