Trampoline Calculator

Spring hole to spring hole distance (inches) Full spring length, end of hook to end of hook (inches) Spring barrel / coil diameter (inches) Calculate Mat Size

Formula: installed stretch length = (1.2942 x spring length) + (2.2665 x barrel diameter) - 2.8212. Mat size = hole-to-hole minus (2 x installed stretch length) minus 3 inches (V-ring allowance, 1.5" per side). This is a TEST tool only, not for customer use yet.