How much does my gate weigh?

You need two numbers to choose a gate opener: the gate’s length and its weight. Length is easy with a tape. Weight is where people guess, and a guess that’s too low means an opener that strains, wears fast or stops mid-swing. Here is how to weigh a gate that is still on its hinges, using a bathroom scale.

Why the weight matters

Every opener has a rated maximum gate weight and length. The gate must be within both. Our guide to choosing a gate opener walks through the other checks, but weight comes first because it rules out the most models. The heavier your gate, the shorter the list.

How to weigh a swing gate, step by step

You need a bathroom scale, a flat block or a scrap of board, and some shims or a small jack.

1. 1

   Step 1: Check that the gate swings freely

   Unlatch the gate and swing it by hand. Fix sagging hinges or anything that drags first, or the reading will be wrong.

2. 2

   Step 2: Set the scale under the free end

   Close the gate and put a bathroom scale on a flat block or board right under the end post at the latch end.

3. 3

   Step 3: Rest the gate on the scale

   Lift the free end slightly or shim the scale up until the gate sits level with its end resting on the scale, not on the latch, a wheel or the ground.

4. 4

   Step 4: Read the scale and double it

   Read the number. For a gate of even build, the hinges carry about half and the scale the other half, so double the reading.

5. 5

   Step 5: Repeat and use the highest result

   Take the gate off the scale, set it back, and read again two or three times. Use the highest doubled number when you choose an opener.

Why doubling works, and when it doesn’t

A gate hanging from its hinges and resting on a scale at the other end is held up at two points. Its weight acts at its center of gravity. For a gate built the same along its length, that center is halfway between the hinge post and the scale, so each end carries about half. The scale reads that half, and you double it.

The rule shifts when the gate isn’t even:

• A heavy end post or lock box at the latch end pushes the center toward the scale. The scale reads more than half, and doubling overestimates. That is the safe direction.
• A heavy hinge stile, diagonal brace or motor bracket near the hinges pulls the center toward the hinges. The scale reads less than half, and doubling underestimates. Add a margin.
• An arched top or decorative panel in the middle stays roughly centered, so doubling still works.

If you aren’t sure, compare your result with the estimate from our gate weight calculator and use the higher number.

Weighing a sliding gate

A slide gate rolls on two wheels instead of hanging on hinges, so the method changes:

1. Close the gate and block it so it can’t roll.
2. Jack one end up just enough to slide the scale under that end’s wheel or frame, then lower it onto the scale.
3. Read the scale. Remove it and do the same at the other end.
4. Add the two readings. That is the gate’s weight.

For a cantilever gate, the support points aren’t at the ends, so this method gives only a rough figure. Ask the fabricator for the weight, or use the calculator.

How much do common gates weigh?

We ran common gate sizes through our gate weight calculator. The low number counts the frame and infill from typical member sizes; the high number adds 25% for hinges, latches, welds and decoration. Real gates vary, so treat these as a sense of scale, not your gate’s weight.

Gate	Estimated weight
12 x 6 ft aluminum, tube pickets	87–108 lb
16 x 6 ft chain link, 9 gauge mesh	124–155 lb
10 x 6 ft cedar, solid boards	135–169 lb
12 x 5 ft ornamental steel, tube pickets	177–221 lb
10 x 6 ft Douglas fir, solid boards	189–236 lb
16 x 5 ft steel tube ranch gate	239–299 lb
20 x 6 ft steel, solid 16 gauge sheet	434–543 lb
12 x 6 ft wrought iron, solid bar pickets	457–571 lb

Two things stand out. Solid steel bar pickets weigh several times more than tube pickets of the same size, and wet or pressure-treated wood weighs more than the dry densities the calculator uses. An Oklahoma gate installer puts most 14 to 18 ft pipe gates at 250 to 600 lb, which fits the ranch row above.

What to do with the number

Compare your gate with each opener’s rated maximum length and weight. Both must cover your gate. Three examples, using ratings the maker publishes for openers our partner sells:

Your gate (per leaf)	Needs at least	Example that fits
12 ft swing leaf, weighed at 220 lb	12 ft and 220 lb	Eagle-II (14 ft, 400 lb) or Eagle-100 (18 ft, 600 lb)
16 ft swing leaf, weighed at 650 lb	16 ft and 650 lb	Eagle-200 (20 ft, 750 lb)
30 ft slide gate, weighed at 1,400 lb	30 ft and 1,400 lb	Eagle-2000 FR 1 HP (45 ft, 2,000 lb)

Notice the third row. A 1,000 lb opener with a long reach still doesn’t fit a 1,400 lb gate. Weight rules out more openers than length does. If your weighing and the calculator disagree, use the higher number; for a solid gate in a windy spot, leave extra headroom.

Checklist before you trust the number

• The gate swung freely before you weighed it.
• The gate sat level, and only the scale held the free end.
• You weighed each leaf separately (double gates).
• You repeated the reading and used the highest.
• You compared with the calculator estimate and kept the higher number.
• You know the leaf length too, hinge to the far end.

Common mistakes

• Leaving the latch engaged. The latch carries part of the weight, and the scale reads low.
• Weighing a sagging gate. If the free end drags, the ground carries part of it. Fix the hinges first.
• Adding both leaves together for a double gate. Each operator only moves its own leaf.
• Using the catalog weight. Some catalog figures leave out pickets, mesh or hardware. Weigh the gate as installed.
• Forgetting wind. A solid gate weighs the same in a storm, but it pushes back much harder. Opener ratings don’t cover wind load, so leave headroom for solid leaves.

Next steps

With the weight and length in hand:

• Run our Gate Opener Finder to see which openers are rated for your gate.
• Over 1,000 lb? See gate openers for heavy gates.
• Light to mid-weight gate? Compare swing gate openers or sliding gate openers.
• Plan the budget with our guide to gate opener cost, and the safety side with our UL 325 guide.