Contact
Questions, feedback or a suggestion for a calculator? We'd be glad to hear from you.
Get in touch
The best way to reach us is by email at [email protected].
Calculation and tool feedback is especially welcome — if a result looks wrong or a calculator behaves unexpectedly, please tell us, since every tool is checked against known examples and we want to catch anything we've missed.
Privacy questions
Privacy-related questions are handled through our Privacy Policy, which describes exactly how images are processed locally and what is collected. The short version: your images never leave your browser.
Before contacting, the Terms of Use explain how the calculators work and what the results do — and don't — guarantee.