Terms and limitations
Important use limitations, measurement assumptions and third-party content considerations for free online tools.
Free informational tools
Tools are provided for general use on an as-available basis. They do not replace the services of qualified financial, medical, legal, engineering or other professionals.
Check results
Calculations rely on entered values, software limits, formulas and simplifying assumptions. Local laws, financing terms and measurement conventions may differ. Confirm results before relying on them for consequential decisions.
Third-party content
Only reuse YouTube thumbnails and other third-party materials where you have the appropriate permissions. Access to a publicly available image does not grant copyright or licensing rights.
Technical limitations
Large images and text files can exceed browser memory; support varies by device. Features may be improved or adjusted without notice.