Home Improvement

Project estimation calculators with industry-typical coverage values you can adjust to your materials.

Calculate how many liters and cans of paint you need from wall area, openings, coats and coverage rate. Includes 2.5L and 5L can rounding.

Floors & Surfaces

Calculate how many tiles you need for a floor or wall from area, tile size and waste percentage. Includes standard 10% waste allowance.

Calculate how many flooring packs you need and the total cost from room area, pack coverage, waste allowance and price per pack.

Calculate the daily, monthly and yearly running cost of an appliance from its wattage, hours of use and your electricity rate.

Estimate annual solar savings, energy generation and payback period from system size, peak sun hours, system losses and electricity rate.

Calculate energy use in kilowatt-hours (kWh) and the resulting cost from an appliance's wattage, hours of use and electricity rate.