--- title: "Brick and block calculator — free, runs in your browser" description: "How many bricks or blocks a wall needs, with mortar quantities. Free, no sign-up, and nothing you enter leaves your browser." url: https://atoneplace.net/tools/brick-calculator/ site: "At One Place" --- # Brick and block calculator How many bricks or blocks a wall needs, with mortar quantities. ## How it works Calculates bricks or blocks for a wall from its area and the unit size, including the mortar joint. The joint is part of the arithmetic, not an afterthought. A standard UK brick is 215 × 102.5 × 65 mm and is laid with a 10 mm joint, so each brick effectively occupies 225 × 75 mm on the face \u2014 which works out at exactly 60 bricks per square metre for a single-skin wall. Ignoring the joint overestimates by around 15%. A double-skin (one brick thick) wall needs 120 per square metre. Standard concrete blocks at 440 × 215 mm with the same joint work out at about 10 per square metre. Allow 5% for breakage and cuts, more if the wall has many openings or returns. > This tool runs entirely in your browser. Nothing you enter is sent to a server, logged or stored, and the page keeps working with the network disconnected. ## Common questions ### How many bricks per square metre? 60 for a single-skin wall of standard UK bricks with 10 mm joints, or 120 for a wall one brick thick. ### How many concrete blocks per square metre? About 10, for standard 440 × 215 mm blocks laid with a 10 mm joint. ## Related pages - [Percentage calculator](https://atoneplace.net/tools/percentage-calculator/) - [Loan and EMI calculator](https://atoneplace.net/tools/loan-calculator/) - [BMI calculator](https://atoneplace.net/tools/bmi-calculator/) - [Tip calculator](https://atoneplace.net/tools/tip-calculator/) - [Age calculator](https://atoneplace.net/tools/age-calculator/) - [Paint calculator](https://atoneplace.net/tools/paint-calculator/) - [Compound interest calculator](https://atoneplace.net/tools/compound-interest-calculator/) - [Calorie and BMR calculator](https://atoneplace.net/tools/calorie-calculator/) - [Dog age calculator](https://atoneplace.net/tools/dog-age-calculator/) - [Discount calculator](https://atoneplace.net/tools/discount-calculator/) ## Sources - Typical range compiled from manufacturer specifications — At One Place (/about/)