1800-Calorie Low-Carb Meal Plan: 7-Day Guide (with Gram Weights)

Medical Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Always consult a registered dietitian, physician, or qualified healthcare provider before making significant changes to your diet, especially if you have a medical condition, take medication, are pregnant or nursing, or are managing a chronic illness. Individual results may vary.

1800-Calorie Low-Carb Meal Plan: An Honest 7-Day Guide

An 1800-calorie low-carb meal plan keeps total carbohydrate to roughly 90 to 110 g per day (about 20 to 25 percent of energy), pushes protein to 120 to 140 g, and lets healthy fat fill the rest.

Bueno et al.’s 2013 meta-analysis of 13 randomized trials with 1,415 adults found very-low-carbohydrate diets produced 0.9 kg more weight loss at 12 months than low-fat comparisons (1). Bazzano et al.

2014 confirmed a 3.5 kg advantage over 12 months in 148 adults, along with better triglyceride and HDL responses (2). Harvard T.H.

Chan’s Nutrition Source notes that carb and fat quality matter as much as totals (3).

How the Macros Work at 1800 Calories

Moderate low-carb at 1800 kcal breaks down roughly as 20 to 25 percent carbohydrate, 25 to 30 percent protein, and 45 to 55 percent fat. That means about 90 to 110 g carb, 120 to 140 g protein, and 90 to 110 g fat per day.

• Carbohydrate: 90 to 110 g. Non-starchy vegetables, berries, small servings of sweet potato or lentils, one low-carb tortilla if wanted. Skip refined grains, sugars, juices.
• Protein: 120 to 140 g. Eggs, poultry, fish, lean beef, tofu, Greek yogurt, cottage cheese.
• Fat: 90 to 110 g. Olive oil, avocado, nuts, seeds, egg yolks, fatty fish. Favor monounsaturated and omega-3 sources over saturated animal fat (3).
• Fiber: 25 to 30 g from vegetables, berries, seeds, and nuts.
• Electrolytes: lower carb intake raises urinary sodium, potassium, and magnesium losses in the first two weeks. Salt to taste, eat leafy greens and avocado daily.

Who This Plan Fits and Who It Does Not

• Fits: adults with insulin resistance, prediabetes, or metabolic syndrome under clinical oversight; adults who want gradual, sustainable weight loss without extreme carb restriction; anyone who has already tolerated a lower-carb pattern for 2 or more weeks.
• Does not fit as written: pregnancy or lactation, adolescents under 18, competitive endurance athletes, adults with type 1 diabetes without endocrinologist support, chronic kidney disease, history of pancreatitis or gallbladder disease, or active eating disorder.

If you take insulin, sulfonylureas, SGLT2 inhibitors, or blood pressure medication, dropping carbs and calories can trigger hypoglycemia or low blood pressure quickly. Coordinate any switch with your prescriber before day 1.

Tested Values Used in This Plan

Values from USDA FoodData Central. Net carbs on nuts and avocado subtract fiber. Per-meal totals below are within about 10 percent of stated numbers.

7-Day 1800-Calorie Low-Carb Meal Plan

Day 1 (approx. 1810 kcal, 95 g carb, 130 g protein, 105 g fat)

• Breakfast (405 kcal, 26 g protein): Eggs and asparagus scramble: 3 eggs with 150 g asparagus and 20 g parmesan cooked in 1 tsp olive oil.
• Snack (155 kcal, 14 g protein): Reduced-fat cheddar slices (2 slices / 56 g) with 60 g cucumber.
• Lunch (395 kcal, 8 g protein): Lemon avocado salad: 1 avocado (150 g), 100 g mixed greens, 60 g cucumber, 30 g pumpkin seeds, 1 tbsp olive oil, lemon.
• Snack (155 kcal, 14 g protein): 2% cottage cheese (100 g) with 60 g pineapple.
• Dinner (700 kcal, 68 g protein): Basic chicken salad: 200 g grilled chicken breast, 100 g romaine, 80 g cucumber, 40 g feta, 1 tbsp olive oil vinaigrette, plus 200 g pan-fried broccoli in 1 tsp olive oil and garlic.

Day 2 (approx. 1790 kcal, 90 g carb, 132 g protein, 100 g fat)

• Breakfast (445 kcal, 30 g protein): Over-easy eggs (4) cooked in 1 tsp butter, with 200 g strawberries on the side.
• Snack (140 kcal, 14 g protein): Reduced-fat cheddar slices (2 slices / 56 g).
• Lunch (490 kcal, 40 g protein): Avocado chicken salad: 140 g grilled chicken breast, 1/2 avocado (75 g), 100 g romaine, 60 g cherry tomato, 1 tbsp olive oil, lemon, plus 120 g cucumber slices with 30 g Greek-yogurt dip.
• Snack (215 kcal, 4 g protein): Cucumber avocado salad: 100 g cucumber, 1/2 avocado (75 g), 1 tsp olive oil, lemon, dill.
• Dinner (500 kcal, 44 g protein): Firecracker turkey burgers (140 g lean ground turkey with chili flakes, garlic, cooked in 1 tsp olive oil) with 200 g balsamic asparagus roasted in 1 tsp olive oil.

Day 3 (approx. 1815 kcal, 95 g carb, 125 g protein, 108 g fat)

• Breakfast (410 kcal, 20 g protein): Classic omelet: 3 eggs cooked in 1 tsp olive oil, with 250 g sliced strawberries on the side.
• Snack (195 kcal, 3 g protein): Pecans (28 g / 1 oz).
• Lunch (520 kcal, 22 g protein): Spinach salad: 100 g baby spinach, 100 g bell pepper, 60 g cherry tomato, 56 g raw almonds (2 oz), 40 g feta, 1 tbsp olive oil vinaigrette.
• Snack (215 kcal, 4 g protein): Cucumber avocado salad: 100 g cucumber, 1/2 avocado (75 g), 1 tsp olive oil, lemon, dill.
• Dinner (475 kcal, 46 g protein): Simple lemon tuna salad: 180 g canned tuna in water, 1 tbsp mayo, 30 g Greek yogurt, celery, red onion, capers, lemon, on 100 g mixed greens with 1 tsp olive oil.

Day 4 (approx. 1820 kcal, 88 g carb, 130 g protein, 108 g fat)

• Breakfast (485 kcal, 26 g protein): Scrambled eggs (3) with 100 g spinach and 40 g feta cheese, cooked in 1 tsp olive oil.
• Snack (140 kcal, 14 g protein): Reduced-fat cheddar slices (2 slices / 56 g).
• Lunch (520 kcal, 26 g protein): Spinach salad: 100 g baby spinach, 100 g cucumber, 80 g cherry tomato, 30 g feta, 60 g grilled chicken breast, 1 tbsp olive oil, lemon, plus 2 celery stalks with 15 g almond butter.
• Snack (165 kcal, 6 g protein): Almonds, raw (28 g / 1 oz).
• Dinner (510 kcal, 30 g protein): Cucumber and eggs salad: 3 hard-boiled eggs, 150 g cucumber, 30 g feta, 1 tbsp Greek-yogurt dill dressing, plus 200 g roasted broccoli in 1 tsp olive oil.

Day 5 (approx. 1800 kcal, 92 g carb, 125 g protein, 100 g fat)

• Breakfast (415 kcal, 30 g protein): Basic chaffle (2 eggs, 30 g shredded mozzarella, 15 g almond flour, cooked in a waffle iron) with 100 g sliced strawberries and 15 g cream cheese.
• Snack (215 kcal, 4 g protein): Cucumber avocado salad: 100 g cucumber, 1/2 avocado (75 g), 1 tsp olive oil, lemon.
• Lunch (475 kcal, 28 g protein): Turkey lettuce rollups: 100 g sliced turkey breast, 30 g reduced-fat cheese, mustard, tomato, wrapped in large lettuce leaves, plus a lemon avocado salad (1/2 avocado / 75 g, 60 g cucumber, 1 tsp olive oil).
• Snack (195 kcal, 3 g protein): Pecans (28 g / 1 oz).
• Dinner (500 kcal, 44 g protein): Balsamic chicken salad: 160 g grilled chicken breast, 100 g mixed greens, 80 g cherry tomato, 30 g feta, 1 tbsp olive oil balsamic vinaigrette, 15 g toasted walnuts.

Day 6 (approx. 1795 kcal, 88 g carb, 125 g protein, 100 g fat, pescatarian)

• Breakfast (395 kcal, 22 g protein): Onion and tomato omelet: 3 eggs with 80 g sliced onion and 80 g tomato, cooked in 1 tsp olive oil, plus 150 g sliced strawberries.
• Snack (315 kcal, 30 g protein): Tuna avocado salad: 120 g canned tuna in water, 1/2 avocado (75 g), 60 g cucumber, 1 tsp olive oil, lemon.
• Lunch (405 kcal, 12 g protein): Spinach and avocado soup: 200 g spinach, 1 avocado (150 g), 300 ml low-sodium vegetable broth, 30 g Greek yogurt, garlic, lime, plus 30 g whole-grain crackers.
• Snack (165 kcal, 6 g protein): Almonds, raw (28 g / 1 oz).
• Dinner (515 kcal, 55 g protein): Simple lemon tuna salad: 180 g canned tuna in water, 30 g Greek yogurt, 1 tsp Dijon, celery, red onion, capers, lemon, on 120 g mixed greens with 1 tbsp olive oil.

Day 7 (approx. 1805 kcal, 90 g carb, 128 g protein, 105 g fat)

• Breakfast (395 kcal, 22 g protein): Scrambled eggs (3) with dried onion flakes, cooked in 1 tsp olive oil, with 100 g sauteed mushrooms.
• Snack (140 kcal, 14 g protein): Reduced-fat cheddar slices (2 slices / 56 g).
• Lunch (490 kcal, 8 g protein): 1 medium apple (180 g) with 30 g almond butter and 1/2 avocado (75 g) sliced with sea salt.
• Snack (195 kcal, 3 g protein): Pecans (28 g / 1 oz).
• Dinner (585 kcal, 81 g protein): Ham-wrapped asparagus: 8 spears asparagus (200 g) wrapped in 100 g lean ham and baked, plus 200 g boiled spinach with 1 tsp olive oil and lemon, and 30 g feta on top.

Weekly Summary

Weekly average lands at about 1805 kcal, 128 g protein, 91 g carb, and 104 g fat. Days sit inside the 20 to 25 percent carb envelope characteristic of moderate low-carb rather than strict keto (under 50 g carb per day).

What the Evidence Actually Shows

• Bueno et al. 2013 meta-analysis of 13 randomized trials found very-low-carbohydrate ketogenic diets produced 0.9 kg more weight loss at 12 months than low-fat comparisons, along with larger reductions in triglycerides and diastolic blood pressure (1).
• Bazzano et al. 2014 randomized 148 adults to a low-carb (under 40 g/day) or low-fat diet for 12 months. The low-carb group lost 3.5 kg more, dropped triglycerides 14 mg/dL more, and raised HDL 4 mg/dL more (2).
• Harvard T.H. Chan Nutrition Source notes that low-carb effects vary by carb quality and adherence, and that pairing lower carbs with whole-food fat sources (olive oil, nuts, fatty fish) is preferable to relying on saturated animal fats (3).

This plan sits at 90 to 110 g carb per day, above the strict ketogenic threshold used in most trials but still well below typical Western intake.

Weight loss is usually slower than on very-low-carb keto but easier to sustain long-term and less likely to trigger constipation or electrolyte cramps.

Managing the First Two Weeks

• “Low-carb flu”: headaches, fatigue, and light-headedness in days 3 to 7 usually track to sodium and water losses. Add 1/2 tsp salt to water once daily, keep magnesium-rich foods (leafy greens, avocado, seeds) on the plate.
• Constipation: pull fiber from non-starchy vegetables, chia and flax seeds, berries. Target 25 to 30 g fiber and 2 to 3 L water daily.
• Cravings: peak on days 4 to 6, drop sharply by week 2. Protein at every meal and a consistent sleep schedule cut them fastest.

Smart Swaps and Shopping Notes

• Swap the low-carb tortilla or chaffle for large lettuce leaves for the lowest-carb wrap.
• Canned wild salmon or sardines with bones are cheaper than fresh salmon and add calcium and vitamin D.
• Full-fat Greek yogurt swaps 1:1 for nonfat if the calorie budget allows (adds 60 kcal per 200 g); protein stays close.
• Extra-virgin olive oil is the default fat here for its monounsaturated profile. Butter and ghee work but should not dominate (3).
• Swap chicken breast for skinless chicken thigh at your own risk: adds about 60 kcal per 100 g cooked. Drop a nut or oil serving to rebalance.

Frequently Asked Questions

Is 1800 calories low-carb enough for weight loss?

For most sedentary or lightly active adults 1800 kcal creates a small daily deficit and produces 0.5 to 1 lb of weight loss per week. Very active adults may hold weight at 1800 kcal. Combining moderate low-carb with a modest calorie deficit tends to work better than either alone.

How is this different from keto?

Keto usually runs under 30 to 50 g total carb per day to induce nutritional ketosis. This plan lands at 90 to 110 g, which is moderate low-carb. Weight loss is typically slower, but the plan is easier to sustain and includes more fiber-rich vegetables and small starchy portions.

Can I do this plan with type 2 diabetes or prediabetes?

Only under clinical supervision. Low-carb eating can lower A1c meaningfully within weeks and can trigger hypoglycemia if you take insulin or sulfonylureas. Ask your prescriber to review medication doses before day 1.

Will I lose muscle at 1800 calories on low-carb?

Not if protein sits at 120 to 140 g per day (as this plan does) and you keep resistance training two to three times weekly. Muscle protein synthesis stays intact at moderate deficits when protein is adequate.

What about the low-carb flu?

Days 3 to 7 can bring headaches, fatigue, and light-headedness from electrolyte shifts. Salt to taste, add magnesium-rich foods (leafy greens, avocado, seeds), and drink 2 to 3 L water daily. Symptoms typically fade by day 10.

Can I have alcohol on this plan?

Occasionally. Dry wine (5 oz, roughly 4 g carb) or spirits with soda water are lowest-carb. Beer and sweet cocktails run 12 to 30 g carb per serving. Alcohol also blunts fat oxidation while it is metabolized.

How long can I stay on 1800-calorie low-carb?

Most adults hold this pattern 12 to 24 weeks before wanting more flexibility. Long-term evidence from Bueno 2013 and Bazzano 2014 supports 12-month safety and effectiveness (1)(2), but a dietitian can help you transition to maintenance rather than yo-yo back to old patterns.

Disclaimer

This article is educational and does not replace individualized medical or nutrition care. This 1800-calorie low-carb plan is not written for pregnancy, lactation, adolescents under 18, competitive endurance athletes, or adults with type 1 diabetes, chronic kidney disease, history of pancreatitis or gallbladder disease, or active eating disorders. If you take insulin, sulfonylureas, SGLT2 inhibitors, or blood pressure medication, cutting carbs sharply can cause hypoglycemia or low blood pressure.

Coordinate any switch with your prescriber before day 1. Not medical advice; consult a registered dietitian before making major dietary changes.