How to Choose the Right Utility Trailer Jack for Your Trailer?

Your trailer jack does the heavy lifting so you don’t have to. Pick the wrong one and you’ll fight a coupler that won’t clear the ball or, worse, bend a jack that’s undersized for the load. The process is simpler than it sounds: weigh the tongue, measure the height, check the mount, then decide between manual and electric. Here’s how to work through each step.

Weight First: Match the Jack to Your Tongue Load

The jack supports only the tongue, not the whole trailer. That’s the number that matters. Typical tongue weight runs 10% to 15% of gross trailer weight; boat trailers often sit lower, around 7% to 10%.

If you don’t have a scale reading, estimate tongue weight at 10% to 15% of the loaded trailer weight. Then add a safety buffer. So a jack rated well above your actual tongue weight gives you room to work without stressing the unit.

Lippert’s guidance is direct: select a jack that meets or exceeds the trailer’s maximum tongue weight, park on level ground, and chock the wheels before any jack work.

The Height Question Nobody Measures First

Before buying, measure the distance from the ground to the coupler when the trailer sits level. Write that number down.

Your jack’s extended height must lift the coupler above the hitch ball with margin to spare. A jack that’s too short leaves you struggling to align the coupler over the ball; one that’s too long wastes travel and can bottom out. West Marine advises checking the jack’s travel and total extension so you know exactly how much lift you’re getting, not just the collapsed size.

Also confirm the mounting style matches your trailer’s tongue. Common options include A-frame, bolt-on, weld-on, pipe, and swivel styles. An A-frame trailer needs a jack designed for that shape; bolt-on or weld-on units fit other tongue structures.

Manual vs. Electric: Decide Before You Install

Manual jacks are simpler, cheaper, and require no wiring. Crank the handle, raise the trailer, done.

Electric jacks add real convenience—no bending, no cranking—but they need a working 12V DC source, compatible wiring, and fuse protection. If your trailer lives near saltwater, corrosion resistance matters more than any other feature. West Marine specifically flags hours of saltwater exposure as a factor in how well a jack survives. For dry inland use, a standard finish is usually fine.

For most single-axle utility trailers, a manual jack is the practical choice. Go electric if you’re loading and unloading constantly or if health or mobility makes cranking a chore.

Common Mistakes and How to Avoid Them

Most jack failures trace back to a few avoidable errors:

• Buying by GVWR instead of tongue weight. The trailer’s total rating tells you nothing about what the jack actually supports.
• Ignoring extended height. You find out the hard way that the coupler won’t clear the ball.
• Ignoring the tongue shape. A bolt-on jack won’t fit an A-frame tongue without adapters.
• Using a damaged or corroded jack. Rusted threads and bent posts fail when you need them most.
• Working without wheel chocks. A trailer that rolls while you’re under it is a hospital visit waiting to happen.

On soft ground, a wheel or foot plate spreads the load and keeps the jack from sinking. Choose the right ground support for where you’ll actually use the jack, not just your driveway.

When you’re ready to compare specific models, our tested roundup of the best utility trailer jack options breaks down real-world performance, weight ratings, and mounting styles side by side.

Safety Rules That Apply Every Time

Never exceed the jack’s rated capacity. Park on a stable, level surface and chock the wheels before raising the trailer. Keep hands, feet, and loose clothing clear of moving parts—especially when lowering. A jack that’s stressed or damaged isn’t worth the risk of a dropped trailer.

To confirm your choice, see Premier Manufacturing’s guide to choosing a utility trailer jack, which details the 50% rule and capacity math.