Free Macro Calculator — Daily Protein, Carbs & Fat

Calculate daily macronutrient targets in grams based on your calorie intake and chosen diet split. Preset ratios for Balanced, Low Carb, High Protein, and Keto, plus a custom mode.

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Use the TDEE Calculator if you don't know your number.

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Enter your details on the left, then press Calculate.

What is this calculator for?

You've figured out your calorie target — 2,200 a day for moderate weight loss. But you don't know if you should be eating 100g protein or 200g, 100g carbs or 300g, 60g fat or 90g. The macro calculator splits your daily calorie budget into protein, carbohydrate, and fat targets in grams, based on goals (lose fat, maintain, gain muscle) and personal preference (low-carb, balanced, performance-oriented).

The three macronutrients provide all dietary calories. Protein: 4 cal/gram; muscle preservation, satiety, repair, and immune function. Carbohydrate: 4 cal/gram; primary fuel for high-intensity exercise, brain function, glycogen replenishment. Fat: 9 cal/gram; hormone production, vitamin absorption, cell membrane integrity, energy storage. Alcohol: 7 cal/gram; provides no nutritional benefit but counts toward calorie intake.

Macro splits common in evidence-based fitness: Standard balanced (40% carbs, 30% protein, 30% fat). High-protein cut (40% protein, 35% carbs, 25% fat). Low-carb (20% carbs, 35% protein, 45% fat) — note this is moderate low-carb, not ketogenic. Ketogenic (5-10% carbs, 20-25% protein, 65-75% fat) — induces metabolic ketosis. Performance (50-55% carbs, 20% protein, 25-30% fat) — for endurance athletes.

This calculator takes your TDEE, goal, and preferred dietary approach and outputs daily macros in grams. It also provides food-volume context: "150g protein/day" translates to roughly 6 oz chicken + 4 eggs + 6 oz salmon + a scoop of whey — concrete amounts most people don't intuit from gram targets alone.

How to use this calculator

Enter your daily calorie target from your TDEE calculation. If unsure, use the Mubboo TDEE Calculator first to derive your maintenance, then apply a deficit or surplus.

Select your goal: Fat loss (recommends higher protein 0.8-1.0g per lb body weight to preserve muscle in a deficit). Maintenance (standard 0.7-0.9g/lb protein). Muscle gain (1.0-1.2g/lb protein to maximize hypertrophy). Endurance (0.7-0.9g/lb protein, higher carbs for glycogen).

Choose your macro distribution: Balanced (standard 40/30/30 carbs/protein/fat). Higher protein (preferred for fat loss; 35/35/30). Low-carb moderate (20/35/45). Performance (50/25/25 for endurance work). Custom — adjust each percentage if you have specific preferences or doctor-recommended restrictions.

The calculator outputs daily grams of each macro, plus equivalent food amounts (eggs, chicken breast portions, rice cups, oil tablespoons) for intuitive planning.

Understanding your results

The calculator returns daily targets in grams for protein, carbohydrate, and fat — plus optional alcohol allowance.

How to read it. Targeting 2,200 cal/day on a balanced 40/30/30 split: carbs 220g (40% of 2,200 ÷ 4 cal/g), protein 165g (30% of 2,200 ÷ 4 cal/g), fat 73g (30% of 2,200 ÷ 9 cal/g). The grams matter; the percentages are a starting framework. Many people miss the math: "30% protein" is twice as many grams as "30% fat" because protein has half the calories per gram.

Protein is the most-important macro to hit. Research consistently shows preserving lean mass in a deficit and maximizing hypertrophy in a surplus both depend on protein intake hitting 0.7-1.2g per pound of body weight. Under-eating protein during a deficit causes more muscle loss alongside fat loss. Over-eating protein doesn't cause harm in healthy adults but provides no additional benefit beyond ~1.2g/lb. Aim to hit your protein target every day; carb and fat distribution is more forgiving.

Carb and fat are interchangeable for general health. The "low-carb" vs "low-fat" debate has been studied extensively; for adherent dieters at equivalent calories, weight loss is similar between approaches. Pick the macro distribution you can sustain. Athletes performing high-intensity exercise (sprints, weightlifting, HIIT, team sports) need carbs to fuel glycogen — at minimum 2-3 g/kg body weight per day for moderate volume, up to 6-10 g/kg for hard training. Endurance athletes need similar or higher.

The fiber-and-sugar nuance. Total carbs include simple sugars and complex carbs together. Fiber subtracts from net carb impact (passes through without digestion, doesn't spike blood sugar). Aim for 25-35g fiber daily. Limit added sugars to under 10% of total calories per dietary guidelines (~50g/day on a 2,000 cal diet) — most people significantly exceed this from sweetened drinks and processed foods.

A worked example

Tara, 31, 5'4" (163 cm), 142 lbs (64.5 kg), wants to lose 17 lbs over the next 8 months. Her TDEE: 1,950 cal/day. Target deficit: 250 cal/day (0.5 lb/week). Daily intake: 1,700 cal/day.

Higher-protein cut macros (35/35/30 carbs/protein/fat):

Protein: 35% × 1,700 = 595 cal ÷ 4 = 149g/day. About 1.05g per lb body weight. This preserves muscle in a deficit.

Carbs: 35% × 1,700 = 595 cal ÷ 4 = 149g/day. Moderate carb, enough for her 3x/week resistance training plus daily walking.

Fat: 30% × 1,700 = 510 cal ÷ 9 = 57g/day. Moderate; enough for hormonal health and meal satiety.

Practical food equivalents to hit 149g protein: 6 oz chicken breast (~50g), 5 oz salmon (~30g), 2 large eggs (~12g), 1 cup Greek yogurt (~20g), 1 scoop whey protein (~25g) — totaling ~137g, close to target. Add a few grams from incidental sources (vegetables, grains, bread) and she hits the 149g target.

Eight months later: Tara is down to 126 lbs. Her TDEE has dropped to about 1,820 cal/day (smaller body burns less). To maintain her current weight she'd eat 1,820; to continue losing the last 1-2 lbs she'd eat 1,720. She's choosing to switch to maintenance — body composition goals met. New macros at 1,820 cal: Protein 137g, carbs 137g, fat 51g. The relative percentages stayed the same; absolute grams scaled down with the smaller TDEE.

Variation: switch to a low-carb approach. 1,700 cal at 20/35/45: carbs 85g, protein 149g (kept same to preserve muscle), fat 85g. Carbs drop dramatically (no rice or pasta meals); fat rises to compensate for calorie target (more avocado, nuts, oily fish, olive oil). Many people find this satiating; others find it restrictive. The math is the math; sustainability is personal. Neither approach is mathematically better; both work if calorie target is hit.

Related resources

To set your daily calorie target first, use the Calorie Calculator and TDEE Calculator. For body composition context to inform macro choices, the BMI Calculator and Body Fat Calculator. The USDA Dietary Guidelines for Americans publish the federal recommendations for macro distributions; the USDA's nutrition.gov includes the Acceptable Macronutrient Distribution Ranges (AMDR).

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Frequently asked questions

What are macros?

Macros (macronutrients) are the three energy-providing nutrients: protein, carbohydrate, and fat. Protein has 4 cal/g and builds/repairs tissue. Carbs have 4 cal/g and fuel high-intensity activity. Fat has 9 cal/g and supports hormones and absorbs fat-soluble vitamins. Alcohol is sometimes called a fourth macro at 7 cal/g but provides no nutritional benefit. Tracking macros is more precise than just counting calories because the same calorie count from different splits produces very different body composition results.

How much protein do I need per pound of body weight?

For sedentary adults: 0.36 g/lb (~0.8 g/kg) is the RDA minimum. For weight loss while preserving muscle: 0.7–1.0 g/lb. For strength training: 0.7–1.1 g/lb is plenty — research shows diminishing returns above 1.0 g/lb. A 170-lb lifter on a cut targets ~150-170g protein/day. Spreading across 3–5 meals optimizes muscle protein synthesis better than one giant dose.

What's the best macro split for weight loss?

Weight loss is primarily a calorie deficit problem; macros affect satiety and muscle preservation, not the deficit itself. Higher-protein splits (30%+) help retain muscle and reduce hunger during a deficit. Many dieters do well on 40P/30C/30F. Keto works for some by eliminating most carb cravings via ketosis but has no metabolic advantage over an isocaloric standard diet. The best split is the one you stick with for months.

How much protein should I eat?

For sedentary adults: 0.4-0.5g per lb body weight (≈ 0.8 g/kg, the FDA recommended daily allowance). For most fitness-focused adults: 0.7-1.0 g/lb. For lifters trying to build or preserve muscle: 0.8-1.2 g/lb. Above 1.2 g/lb provides no additional muscle-building benefit. Older adults (65+) benefit from higher intakes (1.0-1.2 g/lb) to combat age-related muscle loss. Practical targets: a 160-lb person aiming to lose fat and preserve muscle should eat 130-160g protein/day; a 200-lb lifter aiming to gain muscle should eat 160-200g.

Should I count net carbs or total carbs?

For diabetes management: net carbs (total minus fiber and sugar alcohols) better reflect blood glucose impact. For general weight management: total carbs are fine — the difference is small for typical diets. For ketogenic dieters tracking ketosis: net carbs matter because fiber and certain sugar alcohols don't break ketosis. Most fitness tracking apps default to total carbs. Switching to net carbs for low-carb tracking is reasonable; for balanced diets, the distinction adds complexity without much benefit.

Do I need to track macros or just calories?

Calories drive weight change; macros drive body composition and performance. For someone just trying to lose 10 lbs without caring about body composition: counting calories alone works. For someone trying to preserve muscle in a deficit, gain muscle, or optimize athletic performance: tracking protein at minimum is important. Many people start with calorie-only tracking, see that weight loss includes more muscle loss than desired, then add protein tracking to fix that. Tracking all three macros is overkill for most casual goals; tracking protein plus calories captures 80% of the benefit.

Are macros different for keto vs balanced diets?

Yes. Ketogenic diet: 5-10% carbs (typically under 30-50g/day), 20-25% protein, 65-75% fat. The very low carb intake forces the body into ketosis — burning fat and producing ketones for fuel. Standard balanced diet: 40-50% carbs, 25-30% protein, 25-30% fat. Both can support fat loss at the same calorie deficit. Keto has metabolic effects (reduced hunger for some, mental clarity reports, but loss of glycogen and water weight in the first 1-2 weeks that's not fat loss). Balanced diets are easier to sustain socially (you can eat at most restaurants without restriction). Choose based on adherence, not mathematical superiority — both work mathematically.

What's the difference between simple and complex carbs?

Simple carbs: sugars (glucose, fructose, sucrose) that absorb rapidly into the bloodstream, spike insulin, and provide quick energy. Complex carbs: starches and fiber that break down more slowly, provide steadier energy, and include fiber's gut and satiety benefits. Whole foods (oats, beans, sweet potatoes, brown rice, fruit, vegetables) provide mostly complex carbs with some fiber and micronutrients. Processed foods (white bread, white pasta, sugary cereals, soda, candy) provide mostly simple carbs with minimal nutritional value. From a body composition standpoint at matched calories: similar outcomes between simple and complex carbs (calorie is calorie). From a health and satiety standpoint: complex carbs win significantly — better blood sugar control, more fullness per calorie, more nutrients per gram.

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