Contact Us
We would love to hear from you. Whether you have a question, suggestion, or found a bug, your feedback helps us improve CalcOnce for everyone.
Suggest a Calculator
Have an idea for a calculator we should build? We prioritize tools that help the most people.
Report a Bug
Found an error in one of our calculators? Let us know so we can fix it quickly.
General Questions
Questions about how our calculators work or how to use a specific tool? We are here to help.
Partnerships
Interested in embedding our calculators or working together? Reach out to discuss.
How to Reach Us
The best way to contact us is via email. We typically respond within 1-2 business days.
Email us at
hello@calconce.comFrequently Asked Questions
Are your calculators really free?
Yes, all calculators on CalcOnce are completely free to use. We do not have premium tiers or hidden features. We are supported by minimal, non-intrusive advertising.
How accurate are your calculations?
Our calculators use industry-standard formulas and are tested for accuracy. For construction calculators, we include appropriate waste factors. For financial calculators, we use proper compound interest formulas. However, our tools are for estimation purposes, and significant decisions should involve professional consultation.
Can I embed your calculators on my website?
Yes, we offer embeddable versions of our calculators. Visit our embed page for more information and to generate embed codes.
Do you store my calculation data?
No. All calculations are performed locally in your browser. We do not store your inputs or results on our servers. Read our privacy policy for full details on how we handle data.