This is a weight loss calculator for the ketogenic diet. It finds your optimal food intake for your personal weight loss goals. Click  for more!

Your Fat Loss Calculation

To get your personal customized recommendations, please enter some data about yourself.

Female Male
 kg weight ( lbs)

 cm tall (‘ “)

Date of birth: 

Determine Your Energy Expenditure

Given that data, it is possible to calculate your Base Metabolic Rate (BMR). This site uses the Mifflin-St.Jeor-Formula which was the most accurate in two studies.

  •  kcal Base Metabolic Rate

The BMR resembles the resting metabolic rate. The real daily energy expenditure depends on how active you are on average. Based on that activity level we calculate your actual total daily energy expenditure (TDEE). This is the number of calories you need to consume each day when you do not want to lose weight.

  • Sedentary. Typical desk job, little to no exercise.
    Lightly active. Walking around a good amount, retail jobs. 1–3 hours per week of light exercise.
    Moderately active. 3–5 hours a week, e.g. daily 15 minutes biking and 3 times heavy lifting per week.
    Very active. Construction workers, hard exercise 6–7 days per week
    Custom:  kcal
  •  kcal daily energy expenditure

How Much Body Fat do you Have?

Let’s find out your body fat percentage. Based on your height and weight, your body fat percentage might be around %. The most accurate measurement would be a DEXA. Skin fold measurement with a good caliper is also pretty accurate. The easiest way is to just estimate it from some comparison pictures. More: 1234. You can also try this calculator but that can be inaccurate.

  •  % Body fat

With % body fat you have kg (lbs) of lean body mass, and kg (lbs) of body fat. This includes about kg (lbs) of essential body fat that you must not lose.

Learn Your Optimal Macronutrient Ratio

Macronutrients are nutrients that provide energy for your body.

How Many Carbs Can I Eat?

Below 50g of net carbs each day is enough for most people to stay in ketosis. Make sure to get your carbs from vegetables (10-15g), nuts and seeds (5-10g), and fruits (5-10g). Keep in mind that in Europe food labels generally show net carbs, while America shows total carbs. Calculate net carbs by subtracting fiber from total carbs.

  •  g daily net carbs (changeable)

How Much Protein Should I Eat?

It is important to get enough protein to maintain your muscles, but not too much or it will kick you out of ketosis.

Based on your personal data, you should stay above g if you are mostly sedentary. You can go as high as g if you put your muscles under a lot of new stress or with a large caloric deficit. High protein prevents muscle loss.

When in doubt, choose the middle ground. For you, that’s g.

  • no exercise chosen amount very active
     g minimum  g chosen  g maximum
    g/kg g/kg g/kg
    g/lbs g/lbs g/lbs

How Much Fat Should I Eat?

Eat fat to your liking. You have chosen 25g of carbs and g protein. This means you have already kcal of your daily requirements covered. What’s left for you to choose is how much fat to eat.

Here you can choose your caloric intake. Try a moderate deficit and only go lower if you feel comfortable after about a week.

  • lowest intake chosen intake maintenance
     % deficit  % deficit  % deficit
     kcal min  kcal chosen  kcal max
     g fat min  g fat chosen  g fat max

Your Personal Results

Here are your personal macros:

kcal Daily Calorie Intake
25 g Carbs (%, kcal)
g Protein (%, kcal)
g Fat (%, kcal)

Here is a visual representation of your macros and your deficit. The area of the circles is exactly scaled based on your ratios.

Weight Maintenance

Your Target


If you stick to 25g of carbs, g protein, and g fat, you will eat kcal and lose kg (lbs) in the first month. Keep in mind that your body weight can fluctuate by ±2kg (±4lbs) on any given day from water weight and what’s in your stomach. Recalculate your macro ratio once a month! Changes in body composition have a large influence on the recommendations and weight loss.

If you use MFP, update your custom goals with the percentages above. Note: percentage in MFP and above is calculated for calories.

Your Weight Loss Forecast

Now to the fun stuff: a weight and body fat forecast for one year, starting today. Remember that this is a rough estimate and your personal results can differ.

Choose kg or lbs, and then play around with your chosen fat intake to see how it affects weight loss.

  • Start on .
  • Show in kg or lbs
Please enter a date and click kg or lbs to show the graph.

For all you data junkies, you can download a CSV file of your projected weight loss. This contains all the data used in the above graph.

Got Questions?

Post Your Question to /r/keto

We can help you. Create a /r/keto post, and replace the first text line with your question. Or click inside this field: