Note! This calculator is for Mounjaro (tirzepatide) only and is based on the Eli Lilly 4-dose KwikPen, including both the original and newer lower-volume pen versions.

If you choose to use your KwikPen in any way other than as described in the manufacturer's instructions, you do so at your own risk.

This tool uses publicly available information together with estimates where exact information is not available. In particular, calculations involving liquid remaining after the four standard doses are estimates and the actual amount may vary.

It is intended to help you understand the calculations involved and is not medical advice. Please speak to your doctor or other qualified healthcare professional before changing your dose, dosing frequency, or how you use your Mounjaro pen.