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Questions, corrections and ideas are welcome.
We read messages about errors, suggestions and general questions.
What to include
- For a calculation error: the tool name, the numbers you entered and the result you expected, with how you worked it out.
- For a feature idea: a short description of the tool you need.
- For privacy questions: see our Privacy Policy.
What we cannot do
We cannot give personal financial, tax, legal or business advice, and we cannot see or recover anything you typed into a tool, because the calculations happen in your browser.