Water Fasting Timer

Track extended water fasts with elapsed time and milestone stages from 12 to 72 hours.

Press Start Fast to begin tracking.

Do not fast over 24h without medical supervision. Not medical advice.

How to use

Start your fast and track elapsed time against milestone stages.

What happens at each fasting stage?

Roughly: 12h ketosis begins, 24h autophagy rises, 48-72h deeper repair. Individual experience varies widely.

Is extended fasting safe?

Fast over 24h carry risks (electrolytes, refeeding). Do not attempt without medical supervision. Not medical advice.

☕

Every tool runs 100% in your browser — no uploads, no signups. If a tool saved you time, consider supporting us with a small donation.