Concrete Calculator for Patio — How Much Do I Need?

Patio Concrete Guide

A concrete patio typically requires 4-inch thick concrete rated at 3,500 PSI for residential use. Always prepare a 4-inch compacted gravel base before pouring. Add control joints every 8–10 feet to control cracking. Standard waste allowance is 5–10%. Allow 7 days before walking on it and 28 days before placing heavy outdoor furniture. A 12×16 ft patio needs about 2.4 cubic yards of concrete.