We typically respond within 1-2 business days. During busy periods it may take up to 3 business days. We read every message personally and do our best to provide helpful, thorough responses.
Get in Touch
Contact Us
Have a question, found a bug, or want to suggest a feature? We read every message and usually respond within 1-2 business days.
Send Us a Message
Fill out the form below and we'll open a prefilled email draft for you. Once you send it from your mail app, we'll usually reply within 1-2 business days.
This contact form works entirely on the client side and does not store your message on our servers before you send it.
How We Handle Messages
The fastest way to get a useful reply is to include concrete details. For bug reports, tell us the values you entered, the result you saw, the result you expected, and your browser or device. For feature requests, explain the problem you are trying to solve and how a new tool or workflow would help.
We use this inbox for product feedback, classroom questions, correction requests, and partnership ideas. We do not outsource responses, and we do not use your message to build a marketing list.
Because the form opens a draft locally in your own mail app, you can review the subject line, edit the message, add screenshots, and keep a copy in your sent mail. That keeps the contact flow transparent and avoids pretending there is a hidden ticket system behind the page.
FAQ
Frequently Asked Questions
Quick answers before you reach out
Use the contact form above and select Bug Report as the subject. Include the values you entered, the result you received, and what result you expected. Screenshots are also helpful if you send them by email afterward.
Absolutely. The calculator is free for educational use. Teachers, tutors, and educators are welcome to use it in class, link to it from their materials, or recommend it to students.
You are welcome to link to the calculator from your website, blog, or educational platform. For iframe embedding or deeper integration, contact us first so we can discuss the best approach.
Yes. We review feature suggestions from users regularly. Select Feature Request in the contact form and describe what you'd like to see. We prioritize requests based on demand and feasibility.
Not on our servers. Calculations run in your browser, and recent results may be saved locally in your browser for convenience. We do not receive those values unless you choose to include them in an email to us. See the Privacy Policy for full details.
Start by refreshing the page or clearing your browser cache. The calculator works best on modern versions of Chrome, Firefox, Safari, and Edge. If the issue persists, send us your browser, version, and device type so we can investigate.
We're open to partnerships with educational platforms, math-focused websites, and related projects. Select Other in the contact form and describe your proposal. We'll review it and reply as soon as we can.