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Calories & Diet Calculator

TDEE Calculator After 40

Estimate your maintenance calories, BMR formula comparison, and goal calories for fat loss or muscle gain after 40.

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BMR Formula Compare

Compare Mifflin-St Jeor, Revised Harris-Benedict, and Katch-McArdle when body-fat percentage is entered.

Maintenance Calories

Estimate total daily energy expenditure after activity level is applied.

Goal Calories

Set a moderate fat-loss, maintenance, or lean muscle-gain target.

Why TDEE matters after 40

TDEE stands for total daily energy expenditure. It is the estimated number of calories your body burns in a full day after activity is included. For adults over 40, this number is important because the wrong calorie target can create the wrong result: too low and energy, training performance, and muscle retention suffer; too high and fat loss stalls.

A good TDEE calculator should not just give a number. It should help you choose a realistic target, connect that target to protein and macros, and give you a plan you can follow for at least two weeks before changing everything again.

What to do after calculating

  • Use maintenance calories as your baseline.
  • Choose a moderate deficit for fat loss, not a crash diet.
  • Set protein next so you protect lean muscle.
  • Track waist, energy, strength, and consistency.

FAQ

What is the best calorie deficit after 40?

A moderate deficit is usually easier to sustain and better for preserving training performance than an extreme deficit.

Should I use Katch-McArdle?

If you know your body-fat percentage and carry more muscle, Katch-McArdle can be useful because it uses lean body mass.

How often should I adjust calories?

Give a target 10 to 14 days before making changes, unless energy, recovery, or symptoms are clearly poor.

Related BPF Pages

Protein Calculator After 40 Macro Calculator After 40 Body Fat Calculator

Fitness calculators are educational estimates and coaching tools. They are not medical diagnosis or treatment. If you have pain, symptoms, medications, medical conditions, or injury concerns, consult a qualified professional.