Your Fat Scientist alternative for GLP-1 calculators
Looking for an alternative to a Fat Scientist calculator? Use Onederland’s free tools to convert a prescribed vial dose between mg, mL and U-100 syringe units, work backwards from units, or check two vial strengths. Then keep your dose history, weight and food together in the free Onederland app.
Available for iPhone, iPad and Android: iOS 18+, iPadOS 18+ or Android 10+. Apple Health is for iPhone/iPad; Android uses Health Connect.
GLP-1 dose calculators, by task
Tirzepatide dose calculator: enter your vial’s printed strength and prescribed dose in the tirzepatide units calculator. See mg, mL and U-100 units together.
Semaglutide dose calculator: use the semaglutide units calculator for a vial’s concentration and prescribed amount. Keep the label beside you as you enter its numbers.
How much did I take? The reverse dose calculator converts the U-100 units you entered to mg using your vial’s concentration.
Vial transition calculator: checking two different strengths? The two-vial calculator shows the arithmetic for each vial separately, with the label information to discuss with your pharmacist.
Split dose calculator: the split dose tool shows the arithmetic for a weekly amount at another interval, alongside the published label warnings.
Reconstitution calculator: the reconstitution tool calculates concentration from the amounts in written mixing instructions. For a label expressed per half milliliter, use the mg per 0.5 mL converter.
From a calculation to your daily GLP-1 log
Start with a calculation, then use Onederland to log doses and set reminders. Keep your dose history beside your weight chart and food log. These app features are free.
The free app includes optional Apple Health sync on iPhone, Health Connect sync on Android, and PDF/CSV reports. Browse all Onederland tools for half-life, storage, protein and BMI calculators too.
Use the Onederland calculators
Are the Onederland calculators free?
Yes. The web calculators are free to use. Calculations run in your browser, and the numbers you enter stay on your device.
Do I need to install the app to use a calculator?
No. Open a calculator in your browser and enter your numbers. Install Onederland when you want a dose history, reminders, weight and food logs in one app.
Why choose Onederland
Keep your GLP-1 doses and food together, with free Health sync and PDF/CSV reports. Start without a subscription.
See what you get free
