BTU calculator
Size a room air conditioner with the ENERGY STAR chart: 150 to 250 sq ft needs 6,000 BTU/h, then adjust for sun, people and kitchens. Plan drawn to scale.
4 pages
Rafter calculator
Rafter calculator for gable roofs: enter span, pitch and overhang for run, rise, rafter length and boards. A 24 ft span at 6/12 takes 16 ft 2x8s.
Stair calculator
Stair calculator with a to-scale diagram. Enter total rise to get risers, riser height, treads, stringer length and an IRC check: 7¾ in max riser, 10 in tread.
Tile calculator
Tile calculator: floor area ÷ tile area, plus 10% for a straight layout (15% diagonal), rounded up to whole boxes. Grout estimate and a floor drawn to scale.
Coming soon
Pages being written for this section.
- Board and batten calculator
- Drywall calculator
- Deck calculator
- Wallpaper calculator
- Siding calculator
- Concrete calculator
- Flooring calculator
- Ceiling fan size calculator