Bouncy Castle Calculator — Size & Space

For up to 6 children, a small 3m x 3m castle works. For 7-10 children, go medium (4.5m x 4.5m). For 11-15 children, you need a large (6m x 6m). Combo castles with slides are 6m x 4.5m and hold up to 12. Always follow the hire company's stated maximum capacity.

You need at least 1.5 metres of clear space on ALL sides of the bouncy castle. This is for safety - children can bounce off or fall near the entrance. So a 4.5m castle needs a garden area of at least 7.5m x 7.5m. The ground must be flat and free of sharp objects.

Small castles hire from £50-£80 for a half day. Medium castles cost £70-£120. Large castles and combos with slides range from £100-£200. Weekend rates are higher than weekday. Most hire includes delivery, setup, and collection.

Maximum capacity must be followed. Children must be supervised at all times by an adult. Remove shoes, glasses, and sharp objects before bouncing. Do not use in wind over 24mph. Separate age groups - never mix under-5s with older children. The hire company should provide a safety briefing.