Contact
Questions, corrections and tool suggestions are all welcome. Free Calculator has no account system, so email is the only channel.
Email us
Write to contact@freecalculator.tech. We read everything, and reply to most messages within a few days.
Reporting a wrong result
Please include the tool name and the exact values you entered, plus the figure you expected. The quickest way is to use the Share button on the calculator and paste the link — it carries your inputs and nothing else.
Suggesting a calculator
Tell us the question you are trying to answer. If something close already exists, the tool finder will usually surface it straight away.
Privacy and legal
For data questions see the privacy policy, and for usage terms see the terms of use. Anything else, email the address above.