The calorie deficit meal plan you can stick to

Fat loss comes down to eating a little less energy than you burn, consistently, for long enough to see it on the scale and in the mirror. The hard part isn't the math. It's building meals that keep you full, fit your schedule, and don't make you quit in week three.

This guide shows you how to set a sensible deficit, how to build meals around protein and fiber, a sample day you can copy, and what to change when progress slows.

Step 1: Find your maintenance calories

Your maintenance calories (also called TDEE, total daily energy expenditure) are what you burn in a normal day, including exercise and daily movement. Estimate yours with the TDEE calculator or the calorie calculator. Treat the number as a starting point: real-world maintenance can differ from any formula, and your weigh-ins over the next few weeks are the real test.

Step 2: Pick a moderate deficit

For most adults, a deficit of about 300–500 calories per day below maintenance is a good place to start. That usually works out to roughly 0.5–1% of body weight lost per week, which is fast enough to stay motivated and slow enough to keep your strength and energy.

• Smaller deficit (around 300): better if you're already fairly lean, training hard, or have struggled with big restrictions before.
• Larger deficit (around 500): reasonable if you have more weight to lose and feel fine on it.
• Avoid crash diets. Very low intakes make hunger, low energy, and muscle loss much more likely, and they're hard to keep up. Don't go below what your doctor recommends.

Step 3: Set protein first

Protein is the most important number in a fat-loss plan. It helps you keep muscle while you lose fat, and it's the most filling macronutrient. A common evidence-based target is about 0.7–1 g per pound of goal body weight per day. Get your number from the protein calculator, or read how much protein you need to lose fat.

Spread it across the day: 25–40 g at each of three or four meals is easier than trying to fit it all into dinner.

Step 4: Fill the plate with high-volume foods

The trick to a deficit that doesn't feel like one is eating foods that take up space for few calories:

• Vegetables and fruit: salad greens, broccoli, zucchini, peppers, berries, apples, and citrus.
• Lean proteins: chicken breast, turkey, white fish, shrimp, eggs and egg whites, Greek yogurt, cottage cheese, tofu, and lean beef.
• Fiber-rich carbs: potatoes, oats, beans, lentils, brown rice, and whole-grain bread.
• Measured fats: olive oil, nuts, cheese, and avocado are healthy but calorie-dense, so measure them instead of pouring freely.

A simple plate rule: half vegetables, a quarter protein, a quarter carbs, plus a thumb-sized portion of fat.

Sample 1,800-calorie day

This is an example, not a prescription. Your own target may be higher or lower, so scale portions up or down.

Breakfast (about 400 calories)

Greek yogurt bowl: 1 cup plain nonfat Greek yogurt, 1 cup berries, 1/3 cup granola, and a drizzle of honey.

Lunch (about 500 calories)

Chicken burrito bowl: 5 oz grilled chicken, 3/4 cup rice, 1/2 cup black beans, salsa, lettuce, and 2 tablespoons of guacamole.

Snack (about 250 calories)

An apple with a protein shake made with water, or a cheese stick and a handful of almonds.

Dinner (about 650 calories)

Salmon with roasted potatoes and green beans: 5 oz salmon, 8 oz potatoes roasted with 1 teaspoon olive oil, and a big serving of green beans.

That day lands at roughly 130–150 g of protein and around 30 g of fiber, and it includes foods most people actually like.

Make it easier to stick to

• Repeat meals. Two or three breakfasts and lunches on rotation means fewer decisions and fewer surprises.
• Plan the foods you love. If you want dessert or a drink on Friday, budget for it instead of "being good" until you crack.
• Prep the protein. Cooking a batch of chicken, ground turkey, or tofu twice a week makes good meals the easy default. See meal prep for busy professionals.
• Keep training. Strength training two to four times a week tells your body to keep muscle while you diet. A 3-day full-body workout is plenty to start.
• Walk more. Daily steps are an easy way to burn more without needing more recovery.

What to do when progress stalls

Weight goes up and down day to day because of water, salt, carbs, and hormones. Judge progress by your weekly average weight, not a single weigh-in.

1. Check two to three weeks of data. If your weekly average hasn't moved, you're probably close to maintenance.
2. Tighten tracking first. Oils, sauces, drinks, and weekend meals are the usual hidden calories.
3. Then adjust a little. Cut about 100–200 calories a day or add 2,000–3,000 daily steps, and give it another two weeks.
4. Take breaks when you need them. A week or two at maintenance after a long diet can make the next phase easier to stick to.

Safety notes

This is general nutrition information for healthy adults 18+, not medical advice. If you're pregnant or breastfeeding, have diabetes or another medical condition, take medication, or have a history of disordered eating, talk to a doctor or registered dietitian before changing how you eat.

Let the plan do the math

Forma builds a calorie and protein target from your height, weight, age, activity, and goal, then gives you flexible meal options you'll actually eat, a workout plan for the days you have, and a tracker so you can see your weekly trend.