About PatioCalc

PatioCalc is a small, independent collection of free calculators for home and garden projects: tile, gravel, concrete, pavers, mulch and fence painting. It is built for homeowners and DIYers in the United States, Canada, the United Kingdom, Australia and anywhere else people measure a patio before heading to the supply yard.

What we try to do

• Show the working. Every calculator page explains the formula, walks through a worked example and lists the assumptions it uses, such as bag yields and material densities, so you can check the result yourself.
• Work in your units. Every calculator switches between imperial (feet, inches, cubic yards, US tons) and metric (metres, centimetres, cubic metres, tonnes), and converts your entries when you switch.
• Keep prices honest. Prices vary by region and change often, so cost fields are pre-filled with clearly labelled example prices that you can replace with your own quotes. We do not publish invented "average costs".
• Stay fast and private. The calculators run entirely in your browser. Nothing you type is sent to us.

How the calculators are checked

The calculation code is shared between all pages and covered by automated tests that check the formulas, unit conversions and rounding against hand-worked examples, including the examples printed on each page. If you find a result that looks wrong, please tell us with the numbers you entered and we will look into it.

Limits

PatioCalc provides estimates for planning and budgeting. It is not a substitute for professional advice, your product's instructions or local building codes. Please read our disclaimer.

Advertising

PatioCalc is free to use. We plan to support the site with advertising, which will be clearly separated from the calculators and content. See our privacy policy for details.