All calculators

Every calculator on CalculateForAll in one place — each with its formula, a worked example, measurement instructions, practical tips and FAQs.

Concrete Calculator Calculate how much concrete you need for a slab, footing or driveway. Brick Calculator Calculate how many bricks and how much mortar you need for a wall. Cement Calculator Calculate cement bags, sand and gravel for any concrete or mortar mix ratio (1:2:4, 1:3:6, 1:4 and more). Paint Calculator Calculate how much paint you need: enter wall area, doors, windows and coats. Tile Calculator Calculate how many tiles and boxes you need for floors and walls. Flooring Calculator Calculate how many packs of laminate, vinyl or engineered wood flooring you need. Wallpaper Calculator Calculate how many wallpaper rolls you need. Drywall Calculator Calculate drywall sheets for walls and ceilings, plus screws and joint compound. Gravel Calculator Calculate how much gravel you need for driveways, paths and drainage. Sand Calculator Calculate how much sand you need for paver bases, screeds, mortar and sandpits. Pavers Calculator Calculate how many pavers you need for a patio, path or driveway, plus gravel base and bedding sand tonnage. Roofing Calculator Calculate roof area from house footprint and pitch, then convert to shingle bundles and underlayment rolls. Fence Calculator Calculate fence posts, panels, rails and post concrete for any fence length and post spacing. Room Area Calculator Calculate room floor area in square metres or feet, including alcoves, plus perimeter for skirting boards. Wall Area Calculator Calculate total wall area of a room minus doors and windows. Pool Volume Calculator Calculate pool water volume in litres or gallons for rectangular and round pools with sloped floors. BTU Calculator Calculate the BTU per hour your room needs for air conditioning or heating. AC Size Calculator Convert your cooling load in BTU to tons and kilowatts, and find the next standard air conditioner size. Electricity Cost Calculator Calculate how much any appliance costs to run per day, month and year. Solar Panel Calculator Calculate how many solar panels you need from your monthly kWh usage, local sun hours and panel wattage. Generator Size Calculator Calculate what size backup generator you need. Renovation Cost Calculator Estimate your home renovation budget from area and finish quality, with kitchen and bathroom options. Loan Calculator Calculate monthly loan payments, total interest and total cost for any personal loan. Mortgage Calculator Estimate your monthly mortgage payment, total interest and full cost of the home from price, down payment, rate and term. Compound Interest Calculator See how an initial investment plus monthly contributions grows with compound interest. Savings Calculator Plan a savings goal: see how monthly deposits grow with interest over time. VAT Calculator Add VAT to a net price or extract VAT from a gross price at any rate. Discount Calculator Calculate the final price after one or two stacked discounts, how much you save and the effective discount percentage. Fuel Cost Calculator Calculate how much fuel any drive will cost from distance, consumption (L/100km or MPG) and fuel price. Fuel Economy Calculator Measure your real fuel economy from a fill-up: distance driven and fuel used give MPG or L/100km, with instant conversion between the two. Trip Cost Calculator Budget a road trip: total fuel cost for one-way or round trips, with cost per passenger. Car Loan Calculator Calculate monthly car loan payments from vehicle price, down payment, rate and term. Tire Size Calculator Decode tire markings like 205/55 R16: overall diameter, sidewall height, circumference and revolutions per km. Profit Margin Calculator Calculate gross profit margin from cost and selling price, with markup shown alongside. Markup Calculator Set a selling price from cost and markup percentage. Profit Calculator Calculate gross profit, net profit and both margins from revenue, cost of goods sold and operating expenses. Break-Even Calculator Find your break-even point in units and revenue from fixed costs, price and variable cost per unit. Percentage Calculator Three percentage calculations in one: find X% of Y, find what percent X is of Y, and find the whole when X is Y% of it. Percentage Change Calculator Calculate percentage increase or decrease between two values, with the absolute change and multiplier. Average Calculator Calculate the mean, median, sum and count of any list of numbers. Ratio Calculator Simplify any ratio to its lowest terms, see each share as a percentage, and split a total according to the ratio. Fraction Calculator Add, subtract, multiply and divide fractions with automatic simplification to lowest terms, plus decimal and percentage equivalents. Length Converter Convert length between metric and imperial units: mm, cm, meters, km, inches, feet, yards and miles. Area Converter Convert area between square meters, square feet, square yards, acres and hectares. Volume Converter Convert volume between liters, milliliters, cubic meters, gallons, cups, pints and fluid ounces. Weight Converter Convert weight between kilograms, grams, pounds, ounces, stones, metric tonnes and US tons. Temperature Converter Convert temperature between Celsius, Fahrenheit and Kelvin with exact formulas. Speed Converter Convert speed between km/h, mph, m/s, ft/s and knots.