Found an incorrect result, a broken calculator, or a formula that doesn’t add up? Tell us — we investigate every report and take accuracy seriously.
- Every report reviewed — No report goes unread. Formula errors are our top priority.
- Fast turnaround — Confirmed formula errors are corrected within 1–2 business days.
- Credit given — Significant corrections are acknowledged. Your expertise helps everyone.
Submit a Bug Report
Be as specific as possible — the more detail you provide, the faster we can investigate. Please include the name or URL of the calculator, the exact inputs you entered, the result CalcFormula gave you, what result you expected and why, and your device and browser if reporting a display issue.
Please note: Bug reports are for calculator errors and website issues only. For project-specific construction or engineering questions, please consult a licensed professional — we are unable to provide site-specific advice.
Types of Issues We Handle
Formula Error
Calculator produces a mathematically incorrect result based on the inputs given. This is our highest priority fix.
Wrong Unit Conversion
Metric or imperial output is off, or units are misapplied in the calculation.
Incorrect Assumption
The formula is correct but uses a default value — such as density or compaction factor — that differs from the current industry standard.
Broken Calculator
The calculator does not load, inputs don’t respond, or the result field stays empty.
Display or Layout Issue
Formatting, overlapping elements, or readability problems on a specific device or browser.
Typo or Content Error
Incorrect label, unit name, description text, or spelling error on a calculator page.
What Happens After You Submit
- We read your report and identify the calculator and inputs involved.
- We reproduce the issue and check the formula against the source reference (ACI, ASTM, or equivalent).
- If a genuine error is confirmed, we correct the calculator and update the page.
- We reply to let you know the outcome — whether fixed, explained, or under further review.
Our Accuracy Commitment
Every calculator on CalcFormula is built on published engineering formulas. When we get something wrong, we want to know — and we want to fix it fast. Accurate tools are the only reason this site exists.