Sunny Weigh by Peptides Library
Calculator

Intermittent fasting calculator, in 30 seconds

Tap to start →

Photo: Kelly Sikkema / Unsplash

Sunny Weigh by Peptides Library

1 / 6

Intermittent fasting calculator

Fasting mostly works by making it easier to eat less, so the best schedule is the one that fits your sleep and social life.

Sunny Weigh by Peptides Library

2 / 6

Step 1

Pick a schedule, from 12:12 to one meal a day.

Sunny Weigh by Peptides Library

3 / 6

Step 2

Set the time of your first meal.

Sunny Weigh by Peptides Library

4 / 6

Step 3

Enter your usual bedtime to check the gap between your last meal and sleep.

Sunny Weigh by Peptides Library

5 / 6

How the window is set

Eating hours = 24 − fasting hours.

Sunny Weigh by Peptides Library

6 / 6

What the evidence shows

Studies that match calories usually find similar weight loss with fasting and regular calorie cutting.

Want the full picture?

Plan your eating window for 12:12, 14:10, 16:8, 18:6, 20:4 or OMAD. See your first and last meal times for the week and how they fit your bedtime.

Tap below for the full page. Not medical advice; talk to your clinician about your care.

Run my numbers