how many calories should i consume to lose weight calculator

How many calories should you eat to lose weight?

The short answer: you need to eat fewer calories than you burn. This is called a calorie deficit. A good starting point for most adults is a daily deficit of 300 to 600 calories. That usually produces gradual, sustainable fat loss while preserving energy and muscle.

This page gives you a practical estimate using your age, sex, height, weight, and activity level. It is not perfect (no calculator is), but it is excellent for setting a smart starting target.

What this calculator does

1) Estimates your BMR

BMR (Basal Metabolic Rate) is the calories your body burns at rest. We use the Mifflin-St Jeor equation, one of the most widely accepted formulas for everyday use.

2) Estimates your maintenance calories (TDEE)

TDEE (Total Daily Energy Expenditure) is BMR multiplied by an activity factor. This gives a realistic estimate of how many calories you burn in a typical day.

3) Applies your selected deficit

Once maintenance calories are estimated, the calculator subtracts your chosen deficit to provide a recommended daily calorie target for weight loss.

How to choose the right calorie deficit

• Small deficit (200-350 calories/day): easier adherence, slower results.
• Moderate deficit (400-650 calories/day): best balance for most people.
• Larger deficit (700+ calories/day): faster loss but higher hunger, fatigue, and dropout risk.

If you are new to tracking, start moderate. Consistency beats intensity.

Daily calorie target is a starting point, not a life sentence

Your metabolism adapts as body weight changes. Expect to reassess every 2-4 weeks. If average weight is not moving after two full weeks of consistent tracking, reduce calories by about 100-150/day or increase activity.

Macro guidance after you get your calorie number

Calories drive weight change, but macros help you feel and perform better:

• Protein: Aim high to preserve muscle (roughly 1.6-2.2 g/kg body weight).
• Fat: Keep enough for hormones and satiety (often 0.6-1.0 g/kg works well).
• Carbs: Fill the rest according to activity and preference.

The calculator includes a simple macro split estimate to make meal planning easier.

Common mistakes that stall fat loss

• Underestimating portion sizes and snacks.
• Not counting liquid calories (coffee drinks, juices, alcohol).
• Setting an unrealistically low target and rebounding on weekends.
• Changing calories too frequently before collecting enough data.
• Ignoring sleep and stress, which increase hunger and reduce compliance.

Frequently asked questions

Is 1200 calories too low?

For many adults, yes. Extremely low intakes can make adherence difficult and may increase nutrient risk. This calculator applies conservative minimums to avoid overly aggressive targets.

How fast should I lose weight?

A common evidence-based range is about 0.25-1.0 kg (0.5-2.0 lb) per week, depending on body size and starting body fat.

Should I eat back exercise calories?

If your activity level is set accurately, usually no. If you do very long endurance sessions, a partial adjustment may help performance and recovery.

Final note

Use your calorie target as a practical baseline. Track your average body weight, hunger, energy, training performance, and adjust slowly. Sustainable fat loss comes from habits you can keep, not crash diets.