I found this on line and saw that many had asked the question for to determine how many caloires you burn using rebounder so here it is take your weight x.0643=..... take that number and X number of minutes and that is the calories you have burned. Here are the steps to achieve a great result:

Trampoline has a loading phase of about 0.3 seconds and the energy and calorie burn generally is in the bed of the trampoline. When you work out on a rebounding trampoline, calories burned daily will go up, which brings you closer to a negative energy balance.
These figures are on par with low-impact aerobic activities.

How Many Calories Do You Burn by Rebounding? In a study by Dr. Paul E. DeVore, the trampoline burned calories up to 11 times faster than walking, 5 times faster than swimming and 3 times faster than running. Skip it!

According to CSGNetwork.com's calorie calculator, an hour of jumping on a trampoline can burn about 240 calories, based on a 150-lb. Learn how to do a vigorous jumping jacks or modified jumping jacks by watching our exercise demonstrations. Yet according to research sponsored by the American Council on Exercise, it's true – and the subjects in their study burned about as many calories on the mini trampoline as they'd burn in a moderate run on a treadmill. Quickly calculate your calories burned by using our Calories burned calculator.This calorie calculator shows you how many calories you burn for many activities at once including, walking, running, cycling, swimming and many more. It seems almost too good to be true that you can build cardiovascular fitness and burn significant calories while jumping on a mini trampoline. Jumping and bouncing on a trampoline is not just fun for kids, but it is also fun for adults along with being an excellent way to burn calories.

Bouncing up and down on the trampoline is not just fun for kids, it's also an effective workout. Jumping on a trampoline won't help you burn calories to burn fat at nearly the same rate as more traditional exercises, but don't discount this simple activity just yet.

Jumping rope burns more than 10 calories a minute while strengthening your legs, butt, shoulders, and arms.

How many calories you burn doing jumping jacks depends on your speed, weight and gender.

here goes. How to Do Jumping Jacks.
A person jumping low is in the trampoline bed for approximately 0.1- 0.3 seconds, meaning the load is potentially 1/3 to 1/10 that of a constant vigorous exercise such as jogging.