Making a nutrition plan comes down to five steps: figuring out how many calories your body needs, dividing those calories among protein, carbs, and fat, adjusting for your specific goal, filling in those numbers with real foods, and tracking your results so you can fine-tune over time. None of this requires a dietitian or an expensive app, though both can help. Here’s how to build a plan yourself.
Step 1: Find Your Calorie Baseline
Before you decide what to eat, you need to know how much energy your body burns in a day. This starts with your basal metabolic rate (BMR), the number of calories your body uses just to keep you alive at rest. From there, you multiply by an activity factor to get your total daily energy expenditure (TDEE), the real number of calories you burn across a full day.
The most widely used formula for BMR is the Harris-Benedict equation. For men: 88.362 + (13.397 × weight in kg) + (4.799 × height in cm) − (5.677 × age in years). For women: 447.593 + (9.247 × weight in kg) + (3.098 × height in cm) − (4.330 × age in years). If you think in pounds and inches, multiply your weight in pounds by 0.453 and your height in inches by 2.54 to convert.
Once you have your BMR, multiply it by one of these activity factors to estimate your TDEE:
- Sedentary (desk job, little exercise): BMR × 1.2
- Lightly active (light exercise 1–3 days/week): BMR × 1.375
- Moderately active (moderate exercise 3–5 days/week): BMR × 1.55
- Very active (hard exercise 6–7 days/week): BMR × 1.725
- Extremely active (physical job plus training): BMR × 1.9
The number you land on is your maintenance calories. Eat that amount consistently and your weight stays roughly the same. Every other decision in your nutrition plan builds on this number.
Step 2: Adjust Calories for Your Goal
If your goal is to maintain your current weight, your TDEE is your daily target. If you want to lose fat, you need to eat below it. If you want to gain muscle, you eat above it.
For weight loss, a deficit of about 500 calories per day is the standard recommendation for steady, sustainable progress. That translates to roughly one pound of fat loss per week. The key safety threshold: women generally should not drop below 1,200 to 1,500 calories per day, and men should not go below 1,500 to 1,800. Eating less than that makes it very difficult to get adequate nutrition and can slow your metabolism.
For muscle gain, a surplus of 250 to 500 calories per day is a reasonable range. A smaller surplus (around 250) minimizes fat gain while still supporting muscle growth. If you’re trying to build muscle while leaning out, keeping only a slight deficit lets you burn fat and still add some muscle, though progress on both fronts will be slower.
Step 3: Set Your Macronutrient Targets
Calories tell you how much to eat. Macronutrients tell you what to eat. The three macros, carbohydrates, protein, and fat, each play a different role, and the balance between them matters more than most people realize.
The generally accepted ranges for healthy adults are 45 to 65 percent of calories from carbohydrates, 15 to 25 percent from protein, and 20 to 35 percent from fat. Those are wide ranges on purpose. Where you land within them depends on your activity level, your goals, and what feels sustainable for you.
Dialing In Protein
Protein deserves special attention because it’s the macro most people either overeat or undereat relative to their goals. The baseline recommendation for a sedentary adult is 0.8 grams per kilogram of body weight per day. If you exercise regularly, that number rises to about 1.1 to 1.5 grams per kilogram. If you lift weights or train for endurance events, aim for 1.2 to 1.7 grams per kilogram. For a 170-pound (77 kg) person who lifts weights three times a week, that works out to roughly 92 to 131 grams of protein daily.
To convert protein grams into a calorie number, multiply by 4 (protein has 4 calories per gram). Do the same for carbs (4 calories per gram) and fat (9 calories per gram). Start with your protein target, then split the remaining calories between carbs and fat based on your preference and activity. People who do a lot of endurance training tend to do better with more carbs. People who feel more satisfied on higher-fat meals can shift toward the upper end of the fat range.
Step 4: Build Your Plate With Real Food
Numbers on a spreadsheet don’t feed you. The next step is translating your calorie and macro targets into actual meals. Harvard’s Healthy Eating Plate offers a simple visual framework: fill half your plate with vegetables and fruits, one quarter with whole grains, and one quarter with protein. Use healthy plant oils in moderation, and limit dairy to one or two servings a day.
A practical way to start is to plan five to seven dinners for the week, then build lunches and breakfasts around what’s easy to prep alongside them. Pick two to three protein sources (chicken, fish, beans, eggs, tofu), two to three whole grains (brown rice, oats, whole wheat bread), and as many vegetables and fruits as you enjoy. Variety matters because different foods carry different micronutrients, and no single food covers everything.
Don’t Forget Fiber
Fiber is the nutrient most nutrition plans overlook. It keeps your digestion running smoothly, helps control blood sugar, and makes meals more filling. The daily targets vary by age and sex. Women aged 19 to 30 need about 28 grams per day, dropping slightly to 25 grams from 31 to 50 and 22 grams after 51. Men aged 19 to 30 need about 34 grams, decreasing to 31 grams from 31 to 50 and 28 grams after 51. Most people fall well short of these numbers. Vegetables, fruits, whole grains, beans, and lentils are the richest sources. If your current fiber intake is low, increase it gradually over a week or two to avoid bloating.
Step 5: Meal Timing and Frequency
You’ve probably heard that eating six small meals a day “stokes your metabolism” compared to eating three larger ones. The research doesn’t support this. Total daily calorie intake, not meal frequency, determines your metabolic rate and body composition. Whether you eat two meals or five, the total energy burned across the day stays essentially the same.
What matters is choosing a pattern you can stick with. Some people do well with three structured meals. Others prefer a lighter breakfast and a larger lunch and dinner. If you exercise, eating a meal with both protein and carbs within a couple of hours after training can support recovery, but outside of competitive athletics, the timing window is forgiving. Pick a rhythm that fits your schedule and keeps you from getting so hungry that you overeat later.
Step 6: Track, Evaluate, and Adjust
A nutrition plan is a starting point, not a finished product. Your estimated TDEE could be off by a few hundred calories, or your macro split might leave you feeling sluggish. The only way to know is to follow the plan consistently for two to three weeks and then evaluate.
The simplest tracking method is a food diary, either a notebook or a free app that lets you log meals. You don’t need to weigh every gram forever, but doing it for the first two weeks builds awareness of portion sizes that stays with you long after you stop logging. Weigh yourself at the same time of day (morning, before eating) and look at the weekly average rather than any single day’s number. Daily weight fluctuates due to water retention, digestion, and hormones, so a seven-day average gives you a much clearer trend.
Beyond the scale, pay attention to how you feel. Energy levels, sleep quality, workout performance, hunger between meals, and mood are all signals that your nutrition plan is working or needs adjustment. If you’re losing weight faster than about two pounds per week, you’re likely in too steep a deficit and risking muscle loss. If you’re gaining weight but your lifts aren’t improving, your surplus may be too aggressive. Small adjustments of 100 to 200 calories at a time are enough to shift the trend without overshootting.
Putting It All Together
Here’s what the process looks like for a real example. Say you’re a 35-year-old woman, 5’6″ (167.6 cm), 150 pounds (68 kg), moderately active, and your goal is gradual fat loss. Your BMR comes out to roughly 1,413 calories. Multiply by 1.55 for moderate activity and your TDEE is about 2,190 calories. Subtract 500 for a safe deficit and your daily target is around 1,690 calories.
For protein, at 1.3 grams per kilogram (a moderate training level), you’d aim for about 88 grams of protein per day, which is 352 calories from protein. That leaves about 1,338 calories to split between carbs and fat. If you go with 50 percent carbs and 25 percent fat from your total, that’s roughly 211 grams of carbs and 47 grams of fat. These numbers don’t need to be exact every day. Hitting within 10 percent consistently is more than enough.
From there, you’d build a weekly meal template: oatmeal with fruit and eggs for breakfast, a grain bowl with chicken and roasted vegetables for lunch, salmon with sweet potato and a side salad for dinner, and a Greek yogurt or handful of nuts as a snack. Prep what you can on Sunday, shop from a list organized by food group, and review your progress every two to three weeks. That’s a nutrition plan. It doesn’t need to be more complicated than that.