How accurate is this Extended Fasting Calculator?

Our calculator uses scientifically validated formulas and provides results based on peer-reviewed research. Results should be used as a general guide and not as medical advice.

Is this tool free to use?

Yes, this Extended Fasting Calculator is completely free to use. No registration or payment required.

Can I use this calculator on mobile?

Yes, our calculator is fully responsive and works on all devices including smartphones, tablets, and desktop computers.

Extended Fasting Calculator

Fasting & Time-Restricted Eating

Plan 48+ hour fasts with supplement protocols, electrolyte needs, and breaking strategies