Have a question, suggestion, or found a bug? Fill out the form below and we'll get back to you within 24–48 hours.
OnlineCalculatorSuite@proton.me
Within 24–48 business hours
Monday – Friday, 9am–5pm EST
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Are the calculators free to use?
Yes, all calculators on Free Online Calculator Suite are completely free with no sign-up required.
How accurate are the results?
Our calculators use industry-standard formulas. Results are estimates and should not replace professional financial or medical advice.
Can I suggest a new calculator?
Absolutely! Use the contact form above to suggest new calculator types. We regularly add new tools based on user requests.
I found a bug — how do I report it?
Please use the contact form and describe the issue including what calculator you were using and what result you expected vs. received.