Home improvement calculators for realistic project planning.
Enter your measurements once and get practical estimates for material quantity, project cost, and planning ranges. These tools use common units, clear formulas, and practical waste allowances.
Paint Calculator
Estimate paint needed for walls, ceilings, doors, windows, and multiple coats.
Paint formula
Paint needed = paintable area × coats ÷ coverage. Add waste for touch-ups, roller loss, and porous surfaces. Always check your paint tin coverage before buying.
Concrete Calculator
Calculate concrete volume for slabs, patios, paths, shed bases, and small foundations.
Concrete formula
Volume = length × width × depth. The calculator converts the result into cubic yards and cubic metres. Structural work should be checked by a qualified professional.
Tile Calculator
Estimate tiles and boxes for bathrooms, kitchens, walls, floors, and backsplashes.
Tile planning note
Order full boxes and keep spare tiles for repairs. Use higher waste for diagonal patterns, large tiles, niches, or irregular rooms.
Flooring Calculator
Estimate flooring area and material cost for laminate, vinyl, hardwood, carpet, or engineered flooring.
Flooring planning note
Material, underlay, trim, delivery, removal, and fitting/labor should be budgeted separately for a full project estimate.
HVAC BTU Calculator
Estimate room cooling or heating capacity using area, ceiling height, sunlight, insulation, and occupancy.
HVAC note
This is a room sizing estimate only. Whole-home HVAC design should be confirmed by a qualified HVAC professional.
Roofing Calculator
Estimate roof area, roofing squares, bundles, pitch factor, and simple material cost.
Roofing note
Valleys, dormers, roof complexity, underlayment, tear-off waste, and installation requirements can change the final quantity.
Bathroom Remodel Cost Calculator
Plan a bathroom renovation budget using size, finish level, labor, and contingency.
Bathroom budget note
Plumbing relocation, waterproofing, permits, structural repair, premium fixtures, and local labor rates can significantly change final cost.