Measuring your trampoline can point you to the correct replacement parts that fit your model, even if you don’t know the brand. In many cases, you can apply these measurements to pieces that fit similar trampolines of the same shape and size. These measurements can also come in handy if you’re moving the trampoline to a different location, either indoors or outdoors.

The steps for measuring a trampoline’s frame and mat vary for different shapes.

## Why Measure a Trampoline’s Frame?

You can use frame measurements to find the correct **spring cover**, **safety pad** or **enclosure netting** for your trampoline. To find the measurement for your particular shape, skip down to the section below, covering measurements for round, oval, rectangular, square or odd-shaped trampolines.

## Why Measure for Springs and Count for Rings?

Not only can you use these calculations to find the correct **spring size**, but you can also use them to find the right **mat size** for your trampoline.

## Things to Consider When Measuring Your Trampoline

- It’s important to take multiple measurements when you measure your trampoline and its parts, to ensure you have the correct number.
- It’s also vital that you count the rings and/or spring holes for your trampoline repeatedly until you have the same count a few times.
- When measuring the diameter of your trampoline, keep the tape measure as straight and centered as possible, so it’s aligned and not crooked.
- If you are measuring the mat on an older trampoline, you may need to measure the trampoline’s frame, springs and ring count to find the right part, rather than just the mat alone. This is especially true if your mat is worn out or torn.
- You can measure trampoline mats while they are detached or attached to the trampoline. If you are measuring the mat on the floor, be sure to smooth it out and keep it completely flat, so you can take the right measurement.

## How to Measure Trampoline Springs and Calculate Rings

If your trampoline has lost its bounce, it may be time to replace the springs.

To measure the springs, remove three or more springs from the trampoline. Then with the spring unstretched, measure one end of the hook to the other end, with both of the hooks intact. Repeat this process to measure a second spring and a third, ensuring you have the correct measurement.

Because springs are sold by the inch, use inches as your unit of measurement.

To calculate the number of rings for your trampoline mat, you can either count the number of springs, or you can count the spring attachment holes around the perimeter of the frame.

## How to Measure for Frame Size on a Round Trampoline

A round trampoline is measured by the outside diameter of the trampoline’s frame, not the mat. To take accurate measurements, you’ll need to use a tape measure. It’s also a good idea to have a helper. Your helper can hold the tape measure in place while you walk to the opposite side of the trampoline.

Starting on one side of the frame, measure all the way to the other side, crossing the trampoline’s center. Repeat the measuring from the opposite side of the frame. Then calculate the average of the two measurements for the correct measurement.

Taking the average can compensate for bends in the frame or inaccuracies if the trampoline isn’t on level ground.

## How to Measure the Mat on a Round Trampoline

If you need to replace the mat on a round trampoline, measure the outside diameter of the trampoline’s frame. Follow the instructions above to measure the frame of a round trampoline.

Next, measure the mat itself, starting from one end of the fabric to the other, across the center.

Also measure the springs and calculate the number of springs, using the instructions in the section, How to Measure Trampoline Springs and Calculate Rings.

## How to Measure for Frame Size on an Oval Trampoline

The oval-shaped trampoline combines the rectangular model’s performance with the safety of the round version. Its reduced width helps to minimize space, which can be a factor in yards that lack room for a larger model.

To determine the dimensions of an oval trampoline, first measure the greatest width of the shorter side. Then measure the greatest width of the longer side. The oval models share a feature with round trampolines: bouncing is easier and lighter in the center.

## How to Measure the Mat on an Oval Trampoline

To measure the mat on an oval trampoline, measure the greatest width of the longer side of the mat, all the way to where the spring touches the mat. Repeat this process for the greatest width of the shorter side of the mat. Also measure the trampoline’s frame, using the instructions above for oval shapes, and measure the springs and calculate the rings. See How to Measure Trampoline Springs and Calculate Rings.

## How to Measure for Frame Size on a Rectangular or Square Trampoline

Measuring a rectangular trampoline is also based on the metal frame.

In this case, you will need to find the length of the four sides of the frame. Begin with the shorter sides, which should be identical. Next, measure the longer sides. The process is the same for square trampolines, except that all sides are equal in length.

## How to Measure the Mat on a Rectangular or Square Trampoline

Measure the frame size of the trampoline, using the instructions from the section above. Then measure the mat itself, starting from one end of the fabric to the other, length and width, but **not** including the rings.

Measure the springs separately and calculate the number of springs, using the instructions above in the section, How to Measure Trampoline Springs and Calculate Rings.

## How to Measure for Frame Size on an Octagonal, Hexagonal or Odd-Shaped Trampoline

From one corner of the trampoline, measure diagonally across to the opposite corner of the frame. Be sure to measure from corner to corner (point to point), **not from side to side.** Repeat this process at another corner to confirm your measurements.

Count the number of corners on the trampoline as well.

## How to Measure the Mat on an Octagonal, Hexagonal or Odd-Shaped Trampoline

Measure the frame, using the instructions above for an odd-shaped trampoline. Next, measure the mat, starting from one corner of the fabric to the other corner, measuring diagonally as you did for the frame.

Also measure the mat, starting from one flat side of the fabric to the opposing flat side of the fabric.

Measure the springs separately and calculate the number of springs, using the instructions for How to Measure Trampoline Springs and Calculate Rings.

Hopefully, these instructions have helped you with the measurements of your round, oval, rectangular, square or odd-shaped trampoline. And now to the next step of getting a replacement part or accessory to fit those measurements!

Hello, I was wondering if you can help me. The tramp I have is about 14 foot octagon shape. 112 rings. Do I need a 14 foot mat or is the tarp smaller than the measurements?

Thanks for stopping by, Ruth. My apologies for the delay. By now, you’ve probably already purchased a new mat for your trampoline. But just in case you haven’t, I wanted to respond to your question. I did some research, and your mat size actually depends on the size of your trampoline springs. For example, if your springs are 8.5 inches, you would need a 12-foot mat for your 14-foot octagonal tramp. If you haven’t already done so, measure the full length of the spring when it’s not stretched out, and provide that to the trampoline dealer. A store, such as Trampoline and More, can help you determine the correct mat size from there.

So I have a trampoline at home that I’ve lost the springs to. I’d like to get that replaced, however, I’ve yet to find a source that tells me how to determine the spring’s size without having the old springs on hand. If you could help in any way that would be great!

I have a 15 1/2 inch octagon would that be considered 15ft has 111 springs and they are 8 1/2 inches what would a mate cost