Get in Touch
Have a question, spotted an issue, or want to request a new calculator? We use this page to collect correction requests, tool suggestions, and general feedback.
For general inquiries, feedback, or collaboration ideas.
Include the calculator URL, your inputs, the result you received, and the result you expected so we can review it quickly.
Send EmailEmail is the Best Way to Reach Us
Whether you want to report a formula issue, suggest a new calculator, ask about our methodology, or share general feedback, email is the fastest way to reach the editorial team.
[email protected]What to Include in Your Message
Subject Line
A clear, concise subject helps us route your message quickly.
Context
Share the calculator URL, topic, or page name so we can route the message correctly.
Your Question
For fixes, include your inputs, the output you saw, and what you believe the correct result should be.
Timeline
If your message relates to a live error or time-sensitive calculator update, let us know the deadline.
Frequently Asked Questions
How quickly do you respond to emails?
We aim to respond to all inquiries within 24-48 hours during business days. For urgent calculator issues, please mention that in your subject line.
Can I suggest a new calculator?
Absolutely! We welcome calculator suggestions. Send us your idea with a brief description of what you need to calculate and how it would be useful.
How do I report a calculator error?
Please email us with the calculator name, the inputs you used, and the incorrect result. Include what the correct result should be if possible.
Are the calculators really free?
Yes! All our calculators are completely free to use. No sign-up, no subscriptions, no hidden costs. We're committed to keeping them free forever.
You can also reach us via GitHub or email