General information only
Every calculator and tool on this site produces results based solely on what you enter and on the method and assumptions described on its page. Results are provided for general information and educational purposes.
Not professional advice
- Financial: loan, interest, tax and price results are estimates. They exclude fees, taxes, changing rates and lender-specific rules unless stated. They are not financial, investment or tax advice.
- Health: BMI, BMR and calorie estimates are population-based screening tools, not diagnoses, and are not medical or dietary advice. Consult a qualified health professional about your individual circumstances.
- Education: grade and GPA results use the scale you configure. Your institution’s official calculation may differ.
- Legal and dates: date calculations follow the conventions stated on each page. Legal deadlines and age rules can differ by jurisdiction.
Files and generated code
- Keep your originals. PDF and image tools create new files and never change the ones on your device, but always keep a copy of anything important and check the result before relying on it.
- Privacy features have limits. Removing metadata, adding watermarks or deleting PDF pages does not hide what is visible in the content itself, and watermarks can be removed by someone determined. These tools are not a substitute for proper redaction or security.
- Check code and configuration. Formatted code, generated rules (such as redirects or robots.txt) and converted data should be reviewed and tested before you use them in production.
- Security tools are for convenience. Password, hash and HMAC tools follow published standards, but you remain responsible for how you store and use secrets.
Accuracy and rounding
Calculations use standard double-precision arithmetic and round displayed results. Small differences from other sites or software can come from rounding, unit definitions or different conventions — each page explains the conventions it uses.
Verify important results
For decisions with financial, legal, medical or safety consequences, verify results independently and seek professional advice.