Free Keto Macro Calculator with PSMF and Higher Protein

Updated March 2026

Whether you are starting keto for the first time or fine-tuning macros you have been eating for years, a good keto calculator takes the guesswork out of how much protein, fat and carbs to eat. I have been eating keto since 2017, I compete in NPC physique competitions and I have coached hundreds of people through this way of eating. This is the keto macro calculator I built because the existing ones were not good enough.

Most free keto calculators give you one set of numbers and call it a day. This one gives you three complete macro profiles: Standard Keto, Higher Protein (my recommended approach) and PSMF (protein sparing modified fast) for aggressive short-term fat loss. Whether you are looking for a macro calculator for keto or a dedicated PSMF calculator, this tool covers both. You see your results instantly on the page with no email required, and you can opt in for a personalized report sent to your inbox with a sample day of eating.

Disclaimer: Links may contain affiliate links, which means we may get paid a commission at no additional cost to you if you purchase through this page. Read our full disclosure here.

Table of Contents-Click to Expand

• Keto Macro Calculator
• How This Keto Calculator Works
• What Is PSMF? Protein Sparing Modified Fast Explained
• Standard Keto vs. Higher Protein vs. PSMF
• How to Use Your Keto Macros
• Why Protein Matters More Than You Think on Keto
• Using This Calculator for Weight Loss
• Frequently Asked Questions

This free keto macro calculator uses the Mifflin-St Jeor formula to estimate your basal metabolic rate (BMR), which is how many calories your body burns at rest just to keep you alive. It is widely considered the most accurate BMR formula available. From there, it factors in your activity level to calculate your total daily energy expenditure (TDEE), which is the total number of calories you burn in a day including movement and exercise.

Unlike most keto calculators that base protein on body fat percentage (which most people guess incorrectly), this one calculates protein based on your ideal body weight. This approach is simpler and more reliable for the vast majority of people. If you have had a DEXA scan and know your actual lean body mass, you can use the optional override for even more precision.

Once your TDEE is established, the calculator applies your chosen calorie deficit or surplus and divides the remaining calories among protein, fat and carbs across all three modes. You get a complete picture of your options rather than being locked into a single set of numbers.

PSMF stands for protein sparing modified fast. It is a short-term, aggressive fat loss protocol that keeps protein high (1.2g per pound of ideal body weight in this calculator) while minimizing fat intake to about 20g per day. The goal is to create a large calorie deficit while protecting your valuable muscle tissue through adequate protein.

A PSMF calculator is essential for this protocol because the macros are very specific. Too little protein and you risk losing muscle. Too much fat and you lose the aggressive deficit that makes PSMF effective. This calculator gives you exact PSMF macros alongside your standard and higher protein keto macros so you can see all three side by side.

PSMF is not meant for everyday eating. I recommend using it for one to two days per week or in structured cycles of one to two weeks at a time. It is a tool in your toolkit, not a lifestyle. Think of it as a way to accelerate fat loss while maintaining the muscle you have worked hard to build. I discuss this in detail in my book 21 Day Fat Loss Kickstart, which combines keto with fasting and PSMF days for maximum results.

If you are new to PSMF, start with just one PSMF day per week and eat your standard or higher protein keto macros the rest of the time. Focus on lean protein sources like chicken breast, white fish, shrimp, egg whites and lean ground turkey on your PSMF days. Our keto food list has net carb counts for all of these and more.

This is the only free keto macro calculator that gives you all three macro profiles in one place. Here is how to decide which mode to follow.

Standard Keto (0.8g protein per pound of ideal body weight) is the traditional ketogenic approach with moderate protein and higher fat. This is a good starting point if you are brand new to keto and want to focus on getting into ketosis first. It works well for general health, mental clarity and steady energy. If you are coming from a standard American diet, these macros will feel like a significant shift and that is enough for most people to see results initially.

Higher Protein (1.0g protein per pound of ideal body weight) is the mode I personally follow and recommend to most people, especially women over 40 and anyone focused on body composition. This is marked as “Recommended” in the calculator because the research on protein and muscle preservation is clear: the RDA for protein is a minimum to prevent deficiency, not an amount that supports optimal health. Plenty of experts and research have put more focus on higher protein recently, and after years of personal experience including competition prep, I am fully convinced. You can still be in ketosis with higher protein. For more on this, check out our protein calculator for women.

PSMF (1.2g protein per pound of ideal body weight, minimal fat) is for short-term aggressive fat loss only. Use it one to two days per week or in structured cycles. Not for everyday eating. This mode is especially useful if you are doing the 21 Day Fat Loss Kickstart program.

If your goal is fat loss while preserving muscle, Higher Protein is almost always the right choice for your daily macros with optional PSMF days mixed in. If your goal is general health or you are not ready to track protein closely, Standard Keto is a solid foundation.

Once you have your macros from the keto macro calculator, the next step is tracking your food intake. I recommend Cronometer for food tracking because it has the most accurate database and tracks micronutrients along with macros. Enter your calorie and macro targets from the calculator and track everything you eat for at least the first two weeks. After that, most people develop an intuitive sense for portions and can track more loosely.

A few practical tips from years of doing this. Hit your protein target every day. This is the one macro that matters most for body composition. If you fall short on fat, that is fine, especially if your goal is weight loss. Fat is a fuel source, not a goal. You do not need to add extra fat to hit your target unless you are genuinely hungry. Keep carbs at or below 20g net carbs per day to stay in ketosis reliably.

If you are not sure what to eat, our keto food list has net carb counts for over 200 foods. When you are ready to stock your kitchen, our keto shopping list is organized by store aisle. And if you are completely new to this way of eating, our complete beginner's guide to the ketogenic diet covers the science, practical tips and how to get started.

There is an old myth in the keto community that too much protein will kick you out of ketosis through a process called gluconeogenesis, where your body converts protein to glucose. While this process is real, it is demand-driven, not supply-driven. Eating more protein does not automatically trigger it. Your body makes glucose from protein when it needs glucose, not simply because extra protein is available.

What actually happens when you eat too little protein on keto is far more concerning. Your body breaks down muscle tissue to meet its protein needs. Muscle is the most metabolically active tissue in your body. Losing it slows your metabolism, makes you weaker and undermines the entire point of losing weight. This is why the Higher Protein mode in this keto calculator is marked as recommended.

Getting adequate protein is especially important as we age. Research on sarcopenia (age-related muscle loss) shows that higher protein intake combined with resistance training is one of the most powerful interventions for maintaining strength and independence as we get older. As a wellness coach and NPC competitor, I have seen firsthand how prioritizing protein transforms body composition at every age. Dr. Wrigley has found in his practice that peri and postmenopausal women generally do better with more protein in their ketogenic diet, and my experience coaching women in this age group confirms that.

Once your protein and macros are dialed in, you can start optimizing health and performance even further. Tracking recovery with a fitness watch or wearable like the Hume Body Pod can help you see how nutrition changes affect your body composition over time.

This keto macro calculator works as a weight loss calculator too. Even if you are not strictly keto, the macro targets here will support fat loss because they prioritize protein (which preserves muscle and keeps you full) while creating a calorie deficit. A traditional weight loss calorie calculator does not account for the quality of those calories, which is why so many people lose muscle along with fat on conventional diets.

The calculator defaults to a 20% calorie deficit for weight loss, which is moderately aggressive. If you find this hard to sustain, use the custom slider to set a gentler 10-15% deficit. Slower, sustainable weight loss almost always beats crash dieting in the long run. If you want faster results for a short period, the PSMF mode is designed exactly for that, just do not use it as your everyday approach.

For a more in-depth discussion of the calories-in-calories-out model versus a hormonal model of weight loss, check out our beginner's guide to keto. If you are looking for structured coaching around your macros and goals, our keto coaching program gives you personalized guidance. Many people find just one session helpful as a way to get clarity on the right macros for their specific situation.