Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Intermittent Fasting Calculator

Plans your daily eating window, meal end time, and per-meal calorie distribution for any intermittent fasting protocol. Ideal for structuring 16:8, 18:6, or custom fasting schedules around your lifestyle.

Fasting Hours

First Meal Time (PM (24hr format: use 12-23))

Daily Calorie Target (calories)

Meals in Eating Window

Fill in the required fields to see your result.

Weight Loss

Daily Calorie Deficit Calculator

Calculate the daily calorie deficit needed to reach a target body weight within a specified timeframe based on the simple rule that 1 kg of body fat ≈ 7,700 calories. Use it for setting realistic weight-loss timelines and avoiding overly aggressive deficits.

Current Weight (kg)

Target Weight (kg)

Timeframe (weeks)

Fill in the required fields to see your result.

Key differences

	Intermittent Fasting Calculator	Daily Calorie Deficit Calculator
Category	Weight Loss	Weight Loss
Inputs required	4	3
Result	IF Schedule Details (hours)	Daily Calorie Deficit Needed (calories)
What it does	Plans your daily eating window, meal end time, and per-meal calorie distribution for any intermittent fasting protocol. Ideal for structuring 16:8, 18:6, or custom fasting schedules around your lifestyle.	Calculate the daily calorie deficit needed to reach a target body weight within a specified timeframe based on the simple rule that 1 kg of body fat ≈ 7,700 calories. Use it for setting realistic weight-loss timelines and avoiding overly aggressive deficits.