Best stud finder for hanging TVs, shelves and art

How to choose

Start with your wall

On plain drywall, almost any finder here will get you onto the stud, and extra cost mainly buys features. Project Farm's edge marks were off by 1/8 to 1/2 inch, and it still called all the tools accurate at locating the stud.^{3 8} Aim for the middle, and an error of that size won't matter. Double layers are harder: Which? tested 12 models behind double plasterboard in the UK and reported huge variation.¹⁵

Plaster is a different problem, because both Zircon and Franklin say its uneven surface makes studs hard to find.^{1 12} Use a metal scan or a strong magnet to find the lath nails, and expect to probe with a small hole.^{6 7 16} Metal mesh in the plaster defeats these tools, according to Zircon, and Franklin says its finder may not work through it either.^{1 4}

Treat a wire warning as a reason to stop, never as permission to drill

A warning is worth having near outlets and switches, but silence doesn't prove the wall is clear. These alerts cover only live, unshielded wiring. Zircon's own sheet lists wires in metal conduit, wires deeper than 2 inches and dead circuits as reasons you'd get no alert.^{1 2}

Wire detection can also simply fail. In 2009, CPSC announced a recall of about 78,000 Stanley Stud Sensor 200 and FatMax 400 units because they could fail to calibrate and detect AC wires, which is a shock hazard. No incidents were reported. If you still have one (models 77-720 and 77-730), contact Stanley to find out whether it's covered and to get a free replacement.^{17 18} CPSC's database shows no recall of any finder in this guide.¹⁸

Turn off the circuit before you drill near an outlet or switch. Live wires usually run vertically beside a stud or through a hole in it, according to Franklin.¹⁰

Don't shop on rated depth

Depth figures are makers' claims, and Zircon says depth and accuracy change with moisture, texture and wall material. Start in the shallow mode, because Zircon's DeepScan may pick up something farther back that isn't a stud.¹

Confirm the stud before you drill

An electronic finder detects a change in the wall. That change could be a stud, a water or gas pipe, a wire or a flaw in the paint, and Franklin's instructions say the tool doesn't identify which.⁴ One Hacker News commenter says a previous owner of his house marked a drainpipe with a stud finder and put three screws in it.¹⁹

Scan at several heights and mark every hit, because a stud reads the same from floor to ceiling, and pipes and other objects usually don't. Check that hits are about 1-1/2 inches wide.¹ Studs usually sit 16 inches apart on center, sometimes 19.2 or 24, so once you find one, measure to the next and confirm it.⁵ For a TV or heavy shelf, test with a small nail or pilot hole first. Franklin's manual says to shut off gas, water and electric power before drilling, and that warning applies to any finder.¹⁰

You only need one finder per household, plus a magnet if you have plaster.

Hit the stud for anything that could fall

The stud matters far more than the fastener. Consumer Reports pulled furniture anchor kits to failure, and the top kit averaged 347 pounds per anchor in wood studs. Of nine kits sold for drywall without a stud, only three held 60 pounds, a force meant to simulate a child's weight.^{20 21}

Hitting the center doesn't make a long screw safe. A trade summary of the 2023 National Electrical Code says holes for cable must sit at least 1-1/4 inches from the nearest edge of the stud, or be protected with a steel plate at least 1/16 inch thick.²² A long lag screw can reach that far, and older homes may not meet the code. Avoid drilling directly above or below an outlet or switch where you can.^{10 22}