Home & DIY Calculators

Free calculators for home improvement projects. Calculate materials, costs, and measurements.

Acreage Calculator — Land Area in Acres, Hectares

Calculate land area in acres from length and width. Converts to sq ft, hectares, sq m, and more.

Calculate square yardage from length and width. Includes unit conversion and optional cost estimation for carpet and flooring.

Calculate square footage for rooms and spaces. Get paint and flooring estimates from one entry.

Calculate paint and primer needed with custom door/window dimensions, ceiling toggle, and cost estimates.

Calculate flooring for multiple rooms with waste presets by pattern (straight/diagonal/herringbone) and box/carton calculator.

Calculate concrete for slabs, footings, columns, and stairways with quantity multiplier and adjustable waste factor. Get cubic yards and bag counts.

Calculate fence materials with gate support: posts, rails, pickets, concrete bags, screws, and gate hardware by fence style.

Calculate mulch, gravel, or stone for rectangle, circle, or triangle beds. Compare bagged vs bulk cost with 8 material types and overage slider.

Calculate gravel, crushed stone, or pea gravel needed. Get cubic yards, tons, and cost estimates.

Calculate tiles needed for floors, walls, and surfaces. Account for grout gaps, box sizes, and total cost.

Calculate BTU needed for AC and heating. Estimate AC size based on room size, insulation, climate, and more.

Calculate voltage drop for electrical wire runs. Check NEC compliance for copper and aluminum wiring.

Calculate how many gallons of water your pool holds. Supports rectangular, circular, oval, and oblong shapes.