Making Construction Maths Simple for Everyone

Who We Are

CAL estimate started with a simple frustration: working out how much concrete a slab needs, or how many bricks a wall takes, shouldn't require expensive estimating software or a stack of conversion tables. We built the tools we wished existed — clean, fast, and honest about the formulas behind every number.

Today our calculators are used by homeowners planning a patio, contractors pricing a job, civil engineers checking a quantity, and students learning how material estimation actually works.

Our Mission

To make construction planning, material estimation, and engineering calculations simple, accurate, and accessible to everyone worldwide. Every tool supports both metric and imperial units, returns results in seconds, and explains the method so you can verify it yourself.

Who We Help

Homeowners, builders, contractors, civil engineers, architects, quantity surveyors, construction companies, students, and DIY enthusiasts. If you need quick, reliable numbers for materials, costs, or budgets, these tools were built with you in mind.

How We Keep It Accurate

Each calculator is based on standard construction formulas and common industry conventions for mix ratios, mortar joints, and wastage allowances. We publish the working so results can be checked against your own drawings and local requirements.

Results are estimates for planning purposes. Always check them against project drawings, local codes, and advice from a qualified professional before ordering materials or committing to a budget.