Contact Us
We read every message and respond within two business days. Whether you've spotted an error in a calculator, want to request a new tool, have a partnership inquiry, or just want to share feedback — we want to hear from you. The fastest way to reach us is by email; for time-sensitive corrections, please put "CORRECTION" in the subject line.
Response time
We respond within 2 business days. For urgent corrections to calculator formulas, use "CORRECTION" in your subject line for priority handling.
Report an error
Found a calculation error or outdated formula? Tell us which tool, what inputs you used, what result you expected, and what the calculator showed. We investigate every report.
Report a correction →Request a tool
Need a calculator or generator we don't have? Tell us what you need and why. We prioritize tools that fill genuine gaps — not duplicates of what already exists elsewhere.