Ordering a new mat or spring set can feel like guesswork if you're not sure where to start measuring. Get it wrong, and you're stuck sending parts back and forth instead of being able to enjoy your trampoline. This guide walks you through measuring every major trampoline component, frame to padding, so you can order with confidence the first time.
Quick Answer:
To measure a trampoline correctly, start with the frame diameter, edge to edge, not the mat. Measure the mat separately, since it's always smaller than the frame. Count your springs and measure end to end for length, measure net height from mat to pole top, and measure padding width around a single spring. Always measure metal to metal, not fabric to fabric, since fabric stretches and skews the number.
Why Getting the Measurements Right Matters
Bits and pieces on a trampoline wear down eventually, but that doesn't mean the whole thing belongs in a landfill. The manufacturers behind the best trampolines sell individual replacement parts, so a stretched mat or a tired spring is an easy fix, and one less trampoline ends up in the trash.
A trampoline's parts, frame, mat, springs, safety enclosure, and padding, all need to fit together precisely. A mat that's too small won't reach every spring, and short springs can leave gaps at the frame edge, so one off measurement throws off the whole system.
Ordering the wrong size usually means a return and a trampoline that sits unused longer than anyone wants. Taking a few extra minutes to measure properly saves you that hassle, whether you're replacing a part or getting ready to move your trampoline to a new spot in the yard.
How to Measure Your Trampoline Frame
Measure your trampoline frame by running a tape measure across the metal ring itself, not the mat or padding on top of it. For round trampolines, measure straight across the center from one outer edge to the other. For rectangular or oval models, measure length and width separately.
Frame size is usually rounded to the nearest common size, like our Astro 14ft or Astro 16ft. If your measurement lands between two sizes, round down, since frames are typically named by their inner diameter rather than the outer edge.
It helps to have a second person hold one end of the tape measure steady on larger frames, where the metal can flex slightly as you pull the tape across. This process is the same for an above ground setup or a sunken frame, since it's about the metal ring itself, not how it sits in your yard.
How to Measure a Trampoline Mat
Measure a trampoline mat by laying it flat and measuring the jumping surface itself, edge to edge, not including the spring rings sewn around the border. The mat is always smaller than the frame diameter, since it needs room for the springs to stretch between the mat and the frame.
Count the v-rings or spring holes sewn around the mat's edge, since this needs to match your spring count exactly for a replacement mat to work with your setup. Mismatched ring counts are one of the most common reasons a new mat doesn't fit right.
If your old mat is worn or stretched out, measuring it directly can give an inflated number. Measure your frame diameter instead and use that as your reference point for ordering.
How to Measure Trampoline Springs
Measure a trampoline spring by laying it flat, fully at rest, and measuring from the tip of one hook to the tip of the other. Even a half-inch difference in length can throw off your bounce once the full set is installed.
Count your total number of springs at the same time. This varies by trampoline size and brand, so don't assume it based on frame diameter alone. Our Astro 14ft uses 84 springs measuring about 7.1 in (18 cm) each, but check your own spec sheet before assuming another size matches.
If a spring is rusted, stretched, or missing a coil, measure a healthy spring from the same trampoline instead, since a damaged spring won't give you an accurate length.
If you're replacing a full set, it's worth choosing quality over the cheapest option you find. Our proprietary ThrusterSprings™ use zinc-galvanized steel for a consistent, deep bounce that holds up season after season.
How to Measure a Trampoline Safety Enclosure
Measure your safety enclosure by taking two numbers: height from the mat surface to the top of the poles, and the frame diameter. Both need to match your trampoline's specs for the enclosure to sit right without sagging or pulling too tight. Our safety enclosures stand about 6 ft tall, though height varies slightly by size, so check your own spec sheet before ordering.
Also, count the number of poles your enclosure uses, since safety enclosures are designed around a specific pole count and spacing. Our 360° Infinity Net is UV-resistant and tightly woven to handle every season outdoors, sized to each frame diameter and pole configuration.
How to Measure Trampoline Spring Padding
Measure spring padding by checking two dimensions: the width of the strip across each spring, and the total length needed to wrap around your frame. Padding width varies by size and spring length, so measure your own frame rather than assuming a standard size.
To find the total length, measure your frame's outer circumference, or add up the length of the individual pad sections currently installed. Padding should overlap slightly at the seams so no metal or spring shows underneath, and thicker padding generally means better coverage, as long as it matches your frame's actual dimensions.
Frequently Asked Questions
How Do I Know What Size My Trampoline Is?
Measure the frame diameter, edge to edge across the metal ring, not the mat. Round trampolines are measured straight across the center, while rectangular models need both length and width. This number, rounded to the nearest common size, tells you what replacement parts will fit.
Is a 14 Ft Trampoline Big Enough for Adults?
Yes, a 14ft trampoline gives adults plenty of jumping surface for comfortable, everyday bouncing. Every size of SpaceJump™ trampoline supports a 330 lb total weight capacity with a 220 lb individual limit, so bigger frames mean more room to move, not a higher weight allowance.
How Many Springs Does a Trampoline Have?
The number of springs depends on the trampoline's size and design, and it ranges widely between models. Larger frames generally use more springs to keep tension even, and the count on your trampoline should match the number of v-rings sewn into your mat's edge.
Measure Once, Order Right, Bounce Sooner
Getting your measurements right the first time, for the frame, mat, springs, safety enclosure, and padding, means fewer returns and more time bouncing. Every component works together, so accuracy in one area protects the fit of the rest.
Whether you're replacing a spring or planning your next backyard upgrade, we're here to help. Ready for launch? Explore SpaceJump™ and find a setup built to keep your family bouncing for seasons to come.