Coverage choices
Use a quarter loft, half loft or full loft. A full platform includes a framed ladder-access opening in the concept model.
Headroom feedback
The designer reports usable width at loft level and warns when the selected arrangement does not pass the planning fit check.
True-scale furniture
Twin, full and queen beds help you judge actual sleeping-space fit instead of relying on a decorative icon.
Loft square footage is not the same as usable loft space
In an A-frame, the roof closes in as you move away from the centerline. The loft calculator focuses on usable width and headroom so you can compare platform height, roof geometry and bed placement before framing a loft that looks large on a floor plan but feels cramped in person.
Check the loft as part of the whole cabin
Use the calculator with the A-frame cabin designer to see the loft inside the full 3D shell. The finished model can show the walking surface and guard while the framing view shows the joists, rim framing and support below. For quantities and member schedules, continue to the material calculator and concept drawings.
Guard height, stair or ladder access, egress, live loads and loft framing are code- and project-dependent. Verify those requirements before building.
Loft guards, access, emergency escape, smoke alarms, loads and ceiling-height rules must be checked locally.