How to Find a Stud to Hang a TV
A flat-screen TV can weigh 30–80 lb, and a wall anchor in bare drywall won't hold it. To mount safely you need to land your bracket on the wooden studs behind the wall. Here's exactly how to find them — including a free way to do it with the iPhone already in your hand.
Why a TV has to be mounted into studs
Drywall is only about half an inch thick and crumbles under sustained weight. Plastic and even toggle anchors are rated for static loads and can creep or pull out over months — with a TV that's an expensive, dangerous failure. Wall studs are the vertical wooden framing members behind the drywall, and a lag bolt driven into a stud gives you a rock-solid, permanent hold. Most TV brackets are designed to span two studs for exactly this reason.
The 16-inch rule (and 24-inch exception)
In almost every home, studs are spaced 16 inches on center — measured from the center of one stud to the center of the next. Some newer or commercial builds use 24 inches. That predictable spacing is your best friend: once you've confidently found one stud, you know roughly where the next one is. A standard TV bracket's outer holes are designed to catch two studs 16 inches apart.
Find the studs, step by step
Set your mount height and area
Decide where the center of the TV should sit — eye level from your usual seat is the standard. Lightly mark the wall so you know the zone you need to scan.
Scan across the wall to find the first stud
Sweep horizontally across your mounting area. The instant your detector spikes over a screw or nail, you've hit a stud. Mark that spot with a pencil.
Find the true center of the stud
Approach the same stud from the left and from the right. Mark where the signal first rises on each side — the center point between those two marks is the middle of the stud, which is where you want your bolt.
Measure 16 inches and confirm the next stud
Measure 16 inches horizontally from your first stud center and scan again to confirm the neighboring stud. Confirming a real second stud — not just assuming it — is what keeps your TV on the wall.
Mount into both studs
Hold the bracket up, line its outer holes to your two stud centers, check it's level, then drill pilot holes and drive your lag bolts into solid wood.
The free way: use your iPhone as the stud finder
You don't need to buy a hardware stud finder for a one-off TV mount. The Stud Finder – Metal Detector app uses your iPhone's built-in magnetometer to detect the metal screws and nails that fasten the drywall to each stud — the same physics a magnetic stud finder uses, right on your phone.
- Open the app and remove any thick case so the sensor sits close to the wall.
- Hold the phone flat against the wall in your mount area and tap start.
- Slide slowly and horizontally. Watch the live signal meter climb from green toward orange — the peak, with its alert, is a fastener in the stud.
- Mark, then repeat 16 inches over to lock in your second stud.
Find your TV studs free
Scan your wall in two minutes — no hardware to buy.
Mistakes to avoid
- Trusting one reading. Always confirm a stud from both sides and confirm a second stud before you drill.
- Drilling on the edge. Aim for the stud's center, not where the signal first appears, so your bolt bites into solid wood.
- Ignoring pipes and wires. Studs often run beside plumbing and electrical. Scan the exact drill spot for metal pipes and wires first.
- Very heavy TVs on plaster. On lath-and-plaster walls or for very large TVs, confirm with a second method before committing.