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Contact us
Have a question, found a bug, or want to suggest a new calculator? We are happy to hear from you.
OneStop Calculators is a free resource maintained by a small team passionate about making financial, health, and utility calculations accessible to everyone. We read every message and typically respond within 1–2 business days.
Email us
For any enquiry — general questions, feedback, bug reports, or partnership proposals — send us an email and we will get back to you promptly.
Write for us
Interested in contributing a finance, tax, or calculator article? We welcome guest posts from knowledgeable writers.
Learn about guest contributions →What you can contact us about
- Calculator questions — need help understanding a result or the formula behind it.
- Bug reports — something is not calculating correctly or the page is not loading.
- Feature requests — want to see a calculator we do not have yet? Let us know.
- Content corrections — spotted an outdated tax rate or an error in our explanations.
- Partnership or advertising — interested in working with us.
Privacy note
We do not share your email address or personal information with third parties. Your message will only be used to respond to your enquiry. Read our privacy policy for more details.