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Contact Do The Calculation
Send product feedback, report a calculator issue, request a new tool, or ask a policy question. Keep formula reports as specific as possible so they can be checked quickly.
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Before you write
Common questions
Are the calculators free to use?
Yes. The current calculator tools are free to use, with no required subscription for basic calculations.
Can I rely on a calculator result as professional advice?
No. Results are informational estimates. Use qualified financial, tax, legal, medical, or accounting professionals for decisions that need personalized advice.
Can I request a new calculator?
Yes. Send the use case, formulas if you have them, and any examples that show the expected result.