Free GLP-1 tools for your weight loss journey
Simple, honest calculators for people on Ozempic, Wegovy, Mounjaro and Zepbound. Estimate your weight loss, set your daily protein target, and plan the practical side of treatment with numbers based on published clinical trial averages.
Try the weight loss calculator See all toolsGLP-1 tools and calculators
Each tool answers one practical question that comes up again and again on GLP-1 treatment. More tools are being added in batches.
GLP-1 Weight Loss Calculator
Estimate how much weight you could lose on semaglutide or tirzepatide over 3 to 18 months, based on clinical trial averages.
Open the calculator CalculatorGLP-1 Protein Calculator
Find your daily protein target to help protect muscle while you lose weight, with a simple per meal split.
Open the calculator Coming soonGLP-1 Fiber Calculator
Work out a daily fiber target to help with the constipation that many people notice on GLP-1 medication.
See what is planned Coming soonGLP-1 Cost Calculator
Add up the real monthly and total cost of treatment so you can compare brands, doses and savings programs side by side.
See what is planned Coming soonGLP-1 Calorie Calculator
Estimate a sensible daily calorie range for steady weight loss while you are eating less on GLP-1 medication.
See what is planned Coming soonGLP-1 Half-Life Calculator
See roughly how long a dose stays in your system, which helps explain weekly dosing and what happens after you stop.
See what is plannedHow GLPKit works, and who it is for
GLPKit is for adults who are taking, or thinking about taking, a GLP-1 medication for weight loss. The tools turn published research averages into plain numbers you can plan around, such as a realistic weight loss range or a daily protein goal.
- Pick a tool. Each calculator covers one question, like weight loss over time or daily protein.
- Enter your numbers. Everything runs in your browser. Nothing you type is sent to a server or stored.
- Read the range, not a promise. Results are estimates built from trial averages, shown as ranges because real results vary a lot from person to person.
- Take it to your doctor. Use the numbers as a starting point for a conversation with your own care team.
GLPKit is run by a small independent team. We are not doctors, and this site is not a substitute for medical care. Read more about GLPKit and our medical disclaimer.
Guides are on the way
Alongside the tools, we are preparing plain language guides on the topics GLP-1 users ask about most: what to eat, foods that commonly cause trouble, how to handle nausea and constipation, what happens at a weight loss plateau, and how stopping treatment usually plays out. Each guide will sit next to the tool it belongs to, so the reading and the numbers stay together.
Frequently asked questions
What is GLPKit?
GLPKit is a free set of GLP-1 tools and calculators for people using medications such as Ozempic, Wegovy, Mounjaro and Zepbound. It helps you estimate weight loss, plan protein and fiber, and understand costs, using published clinical trial averages.
Are the GLPKit calculators free?
Yes. Every tool on GLPKit is free to use, with no account and no sign up. The calculators run in your browser, so the numbers you type are not sent to a server.
Where do the estimates come from?
The weight loss estimates are based on published average results from large clinical trials, including the STEP 1 trial for semaglutide and the SURMOUNT-1 trial for tirzepatide. Each tool page explains its method and links its sources.
Is GLPKit medical advice?
No. GLPKit is an educational tool only. It does not give medical advice, diagnoses or dosing guidance. Always talk to your own doctor or pharmacist about your medication and your health.
Which medications do the tools cover?
The tools are built for GLP-1 medications used for weight management, including semaglutide (Ozempic and Wegovy) and tirzepatide (Mounjaro and Zepbound).