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We read everything — questions about a calculator, corrections, and suggestions for tools you would like to see.
We aim to reply within two business days.
Before you write
- A result looks wrong? Tell us the exact inputs you used and which calculator — that lets us reproduce it immediately.
- Medical questions: we cannot advise on personal medical situations; those belong with your doctor or a registered dietitian.
- Advertising and partnerships: use the same address with “Partnership” in the subject line.