Frequently Asked Questions

Yes. Every online calculator on CAL estimate is free to use, with no account, subscription, or download required. We only charge for optional services such as detailed quantity take-offs, cost plans, and custom calculator builds.

They do. You can switch between metres and feet, square metres and square feet, and cubic metres and cubic yards. Results are clearly labelled so there is no confusion about which unit you are reading.

Our calculators use standard construction formulas and common industry conventions for mix ratios, mortar joints, and waste allowances. They are accurate for planning and purchasing, but results should always be checked against your drawings, specifications, and local requirements.

Spillage, over-excavation, formwork movement, offcuts, and breakage all consume extra material on site. A 5–10% allowance is typical for concrete and masonry, and helps avoid a second delivery part-way through a pour.

Yes. The site is designed mobile-first, so every calculator works on a phone or tablet on site. Nothing needs to be installed and the pages load quickly over a mobile connection.

Always. Each calculator explains the method, the inputs it uses, and a worked example so you can follow the maths or reproduce it by hand if needed.

We serve a worldwide audience, including the United States, United Kingdom, Australia, Canada, New Zealand, and users across Europe, Asia, the Middle East, and Africa. Unit switching and your own currency make the tools usable anywhere.

Yes. Send your drawings and project details through the contact page and we will reply with a fixed price and delivery date, usually within one working day.

No. Calculations run in your browser, so the dimensions and prices you type are not sent to or stored on our servers.

Absolutely. Students and lecturers are welcome to use the calculators and worked examples for study, as long as results are verified against course material and relevant standards.