Trampoline Safety Zone Calculator
Find the clear safety zone a trampoline needs — the free space and total ground diameter — plus whether your yard has room.
How it works
Ground diameter = trampoline diameter + 2·clear zone · Zone area = π·(ground diameter ÷ 2)²
Most falls from a trampoline land beside it, so safety guidance is about the empty ring around the frame, not just the mat. Adding the clear zone to both sides of the diameter gives the circle of ground that must be free of fences, furniture and other equipment — commonly 1.5 to 2 metres all round. Overhead matters too: branches and power lines should be several metres above the highest bounce.
Worked example
A 366 cm (12 ft) trampoline with a 2 m (200 cm) clear zone needs a ground circle of 366 + 2·200 = 766 cm across — about 46 m² of clear space. An 8×9 m yard clears that; a narrow 6 m yard would not.
Frequently asked questions
How much clear space does a trampoline need around it?
Safety standards typically call for about 1.5–2 metres of open space on every side, free of walls, fences, furniture and other play equipment, so a jumper who comes off the mat lands on clear ground.
How much overhead clearance is needed?
Keep the area above clear of branches, wires and eaves — generally 7–8 metres of headroom to the highest point of a bounce, since jumpers can rise well above the frame.
Does a safety net remove the need for a clear zone?
A net reduces the risk but does not replace the clear zone. Jumpers still exit around the edge when climbing on and off, and nets can fail, so keep the surrounding space open.
Related calculators
General guidance only — follow the trampoline manufacturer’s stated clearance and safety instructions.