Contact Us

Have a question about a calculator, found a formula error, or want to suggest a new tool? We read every message and respond to technical queries as a priority. Use the form below or browse the common topics first.





    Fill in the form below and we’ll get back to you as soon as possible. All fields are required.

    Please note: Our calculators are estimation tools. For questions involving structural safety, code compliance, or project-specific engineering decisions, please consult a licensed professional in your area. We are not able to provide project-specific engineering advice.

    How Can We Help?

    🔧 Report a Calculator Error

    Found a result that doesn’t look right? Tell us which calculator you were using, what inputs you entered, and what result you expected. We investigate every report and treat formula errors as a priority fix — usually resolved within 1–2 business days.

    💡 Suggest a New Calculator

    Don’t see the construction calculator you need? Send us a request with the formula or trade category. We prioritize new tools based on user demand and will let you know when it goes live.

    ❓ General Questions

    Questions about how a calculator works, what formula it uses, or what its assumptions are? We’re happy to explain. We aim to respond to general queries within 2–3 business days.

    What to Expect After You Write to Us

    • Formula errors — Reviewed and corrected as a priority, usually within 1–2 business days.
    • Calculator suggestions — Added to our development list. We’ll follow up when it’s live or if we need more detail.
    • General questions — We aim to respond within 2–3 business days.
    • Advertising enquiries — Managed via Google AdSense. We do not handle ad placements directly.

    Frequently Asked Questions

    Are the calculators completely free?

    Yes — every calculator on CalcFormula is 100% free to use with no login, no account, and no paywall. That will never change.

    Do you store the data I enter into the calculators?

    No. All calculations run directly in your browser in real time. We do not collect, store, or transmit any measurements or project data you enter.

    How accurate are the calculators?

    Every calculator is built on published engineering standards from ACI, ASTM, ASCE, and established civil engineering references. Assumptions such as material densities, compaction factors, and waste percentages are clearly documented on each calculator page. For safety-critical or code-compliance work, always verify results with a qualified professional.

    Can I use CalcFormula on my phone or tablet?

    Yes. CalcFormula is fully responsive and works on any device with a modern web browser — desktop, laptop, tablet, or smartphone. No app download is required.

    Can I request a calculator for a specific trade?

    Absolutely. Use the contact form above and describe the calculation you need. We expand the library regularly based on what users request most.

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