Home & Construction
Measure, plan, and make your next project easier.
Calculators
Concrete Calculator
Estimate slab volume with an adjustable waste allowance.
Concrete Bag Quantity Calculator
Estimate bagged concrete quantities using the manufacturer’s mixed yield.
Flooring Calculator
Estimate flooring area with an allowance for cutting waste.
Gravel Calculator
Estimate gravel mass from area, depth, and an entered bulk density.
Material Cost Calculator
Estimate material purchase cost from quantity, unit price, and fixed delivery.
Mulch Calculator
Estimate mulch volume from bed area and desired depth.
Paint Calculator
Estimate liters of paint from area, coats, and product coverage.
Paver Pack Quantity Calculator
Convert a paving area and allowance into a whole number of product packs.
Pipe Water Volume Calculator
Estimate the internal water capacity of a straight circular pipe.
Pool Fill Time Calculator
Estimate fill time from required volume and a measured constant flow rate.
Roof Pitch Calculator
Find roof pitch angle from rise and horizontal run in matching units.
Room Area Calculator
Calculate a rectangular room’s floor area in square meters.
Stair Riser Height Calculator
Calculate equal riser height from a total rise and riser count.
Tile Calculator
Estimate whole tile quantities from area and tile dimensions.
Wall Area Calculator
Find net rectangular wall area after subtracting doors and windows.
Water Tank Volume Calculator
Estimate water volume in a rectangular tank from internal dimensions.
Guides & answers
Concrete bag mass versus mixed volume
If a bag yields 0.012 m³ of mixed concrete, 0.5 m³ with a 10% allowance requires ceiling(0.5 × 1.10 / 0.012), or 46 bags. The yield must come from the prod
How many concrete bags make half a cubic metre?
If a bag yields 0.012 m³ of mixed concrete, 0.5 m³ with a 10% allowance requires ceiling(0.5 × 1.10 / 0.012), or 46 bags. The yield must come from the prod
Planning bagged concrete from mixed yield
If a bag yields 0.012 m³ of mixed concrete, 0.5 m³ with a 10% allowance requires ceiling(0.5 × 1.10 / 0.012), or 46 bags. The yield must come from the prod
How much paint do I need?
Divide paintable area multiplied by the number of coats by the paint’s coverage per liter.
How much concrete do I need?
For a rectangular slab, multiply length, width, and depth in meters. Add an allowance appropriate to the project.
How do you calculate room area?
For a rectangular room, multiply its length by its width using the same unit.
Measuring a Concrete Slab
A quantity estimate starts with measured length, width, and planned thickness. Convert thickness to the same unit before multiplying.
Plan Paint Quantities for a Room
Paint quantity depends on net surface area, number of coats, and product coverage. Measure walls separately from floors and ceilings.
How long does thirty cubic metres take at twenty litres per minute?
Thirty cubic metres is 30,000 litres. At a steady 20 litres per minute, filling takes 1,500 minutes, or 25 hours. Subtract existing water volume if the poo
Flow rate versus total water volume
Thirty cubic metres is 30,000 litres. At a steady 20 litres per minute, filling takes 1,500 minutes, or 25 hours. Subtract existing water volume if the poo
Estimating a pool filling time
Thirty cubic metres is 30,000 litres. At a steady 20 litres per minute, filling takes 1,500 minutes, or 25 hours. Subtract existing water volume if the poo
