How Many Calories Should I Eat to Lose Weight? (Simple Answer)

"How many calories do I need to lose weight?" is one of the most searched nutrition questions on the internet — and also one of the most over-complicated. The answer is straightforward, even if the execution takes some patience.

In this guide, you'll learn how to find your personal calorie target for weight loss, why extreme restriction backfires, and how to actually stay consistent once you have a number to work with.

The Core Principle: Calorie Deficit

Weight loss comes down to one thing: consuming fewer calories than your body burns. This is called a calorie deficit. When your body doesn't get enough energy from food, it pulls from stored fat — and you lose weight.

3,500 calories roughly equals one pound of body fat. So a deficit of 500 calories per day leads to about 1 lb of fat loss per week. A deficit of 250 calories per day leads to about 0.5 lb per week. Simple math, real results.

Step 1: Find Your Maintenance Calories (TDEE)

Your Total Daily Energy Expenditure (TDEE) is how many calories your body burns in a day at your current activity level. This is your maintenance number — the point where you neither gain nor lose weight.

Example: A 170 lb person who works out 2–3 times per week: 170 × 15.5 ≈ 2,635 calories/day maintenance.

Step 2: Set Your Calorie Deficit

Once you know your maintenance calories, subtract 300–500 to create your weight loss target.

Using our 170 lb example with a 500-calorie deficit: 2,635 − 500 = 2,135 calories per day to lose roughly 1 lb per week.

Step 3: Adjust as You Go

Your calorie needs change as you lose weight. A smaller body burns fewer calories. Every 10–15 lbs lost, recalculate your TDEE and update your target. This prevents the dreaded "weight loss plateau."

Also account for changes in activity. A new gym routine means you burn more — which means you might be able to eat a bit more while still losing weight.

Why Very Low Calorie Diets Usually Fail

1,200 calories for most adults is too low. Here's why that matters:

When you cut calories too aggressively, your body responds by slowing your metabolism, breaking down muscle for fuel, and increasing hunger hormones. The result: you feel terrible, lose muscle, and often regain the weight quickly when you stop.

A moderate, sustainable deficit is almost always more effective over 3–6 months than an aggressive one that lasts 3 weeks.

Tips for Staying Within Your Calorie Goal

Eat more protein

Protein is the most filling macronutrient. Higher protein intake means less hunger at the same calorie level — making it much easier to stay in a deficit without white-knuckling it.

Fill up on volume foods

Vegetables, fruit, broth-based soups, and salads all give you a lot of food for very few calories. Eating a large salad before your main meal can significantly reduce how much you eat overall.

Track what you eat — at least initially

Research consistently shows that people underestimate their calorie intake by 20–40%. Even brief periods of tracking help you understand what's actually in your food and correct hidden sources of excess calories.

To Summarise

Finding how many calories to eat to lose weight is a two-step process: know your maintenance calories, then subtract 300–500 for a sustainable deficit. Aim for 1 lb per week, prioritise protein, and adjust every few weeks as your weight changes.

Consistency beats perfection. A moderate deficit you can stick to for months will always beat an extreme one you abandon in three weeks.

Frequently Asked Questions