A little certainty, before you begin.
Good spaces start with good numbers.
Measure a room. Plan the materials. Make the next decision with a little more confidence. 29 free tools, with the working shown.
Find your tool
29 tools shownRoom area, perimeter & volume
Measure rectangular and L-shaped rooms, or combine positioned sections without counting overlaps twice.
Open calculatorPaint quantity calculator
Estimate paintable wall area, litres, whole containers, and an optional cost for each container size.
Open calculatorTile & box quantity calculator
Compare an area-based tile estimate with a rectangular layout grid, including grout joints, waste, boxes, and cost.
Open calculatorFlooring packs calculator
Add room areas and calculate whole flooring packs, purchased coverage, surplus, and optional cost.
Open calculatorConcrete volume calculator
Combine rectangular slabs, rectangular columns, and cylinders to estimate concrete volume and an order allowance.
Open calculatorBrick & block quantity calculator
Estimate units for a single-leaf stretcher-bond wall using wall openings, unit dimensions, mortar joints, and waste.
Open calculatorWallpaper roll calculator
Count full-height drops and whole wallpaper rolls with trimming and free, straight, or half-drop pattern matching.
Open calculatorCurtain dimensions & fabric calculator
Plan two equal curtain panels with fullness, hems, heading allowance, usable fabric width, and pattern repeats.
Open calculatorPatio & paving calculator
Estimate paving slabs from area, slab dimensions, joints, waste, and an optional per-slab price.
Open calculatorRenovation budget builder
Build editable material and labour line items, then add contingency and tax in an explicit order.
Open calculatorPlaster & render calculator
Estimate applied volume and whole bags using your product’s yield or coverage at a stated thickness.
Open calculatorFloor screed calculator
Calculate screed volume, order allowance, whole bags, and optional cost from a product’s mixed yield.
Open calculatorDrywall sheet calculator
Estimate sheet quantities from net wall or ceiling area, sheet dimensions, and a chosen waste allowance.
Open calculatorInsulation quantity calculator
Estimate insulation area, volume, packs, purchased coverage, and cost without inferring thermal performance.
Open calculatorExcavation & fill volume calculator
Compare in-place excavation, loosened material, and loose fill needed for the same compacted void.
Open calculatorRebar theoretical weight calculator
Calculate total bar length and theoretical mass from diameter, length, count, and editable steel density.
Open calculatorSkirting & moulding calculator
Estimate net linear length, waste allowance, whole stock pieces, and cost after excluded openings.
Open calculatorWall-panel quantity calculator
Compare net-area and oriented-grid panel estimates with openings, waste, purchase coverage, and cost.
Open calculatorCountertop area & exposed edges
Combine positioned rectangular countertop sections, deduct cutouts, and measure selected exterior edges once.
Open calculatorDining-table fit calculator
Compare table-edge clearance with space behind occupied chairs in a centred, dimensioned room diagram.
Open calculatorGallery-wall spacing calculator
Arrange equal-sized frames in rows and columns, with entered gaps or symmetric margins and a placement diagram.
Open calculatorEqual shelf spacing calculator
Calculate equal clear gaps and shelf underside positions inside an opening with thickness and edge allowances.
Open calculatorRug fit comparison
Compare positioned rug sizes, room-edge clearances, room coverage, and optional furniture footprints.
Open calculatorDeck-board quantity calculator
Count deck-board rows and stock boards with laying direction, side gaps, waste, purchased length, and optional cost.
Open calculatorFence panels & posts calculator
Count panels and posts across separate or connected runs, with positioned gate openings and explicit shared corners.
Open calculatorGravel, soil & mulch calculator
Estimate loose material volume, weight, bags, and cost using depth and an editable approximate density.
Open calculatorSimple roof surface calculator
Calculate geometric area for flat, single-slope, or equal-pitch gable roofs using plan dimensions and overhangs.
Open calculatorSlope & gradient calculator
Convert rise and horizontal run, angle, or percentage to gradient, ratio, and sloped length.
Open calculatorBuilding-unit converter
Convert metric and common imperial length, area, volume, and mass units with explicit gallon and ton definitions.
Open calculatorNo tools match. Try another word or category.