Have a question, found an error, or want to suggest an improvement? We would love to hear from you.

We aim to respond within 2 business days. Please do not send personal health information via email — for medical questions, always contact your prescriber or pharmacist directly.

Reporting an Error

If you believe the calculator has produced an incorrect result, please include your dose in mg, your vial concentration in mg/mL, and your syringe type when you write in. This helps us investigate quickly.

Content Suggestions

If there is a topic you would like to see covered in the articles section, or a feature you think would make the calculator more useful, we are always open to feedback.