Example Data Table
| Profile |
Sex |
Age |
Weight |
Height |
Activity |
Estimated Target |
| Desk worker maintenance |
Male |
35 |
82 kg |
180 cm |
Light |
About 2,520 kcal |
| Fat loss planning |
Female |
29 |
66 kg |
165 cm |
Moderate |
About 1,760 kcal |
| Lean gain planning |
Male |
24 |
74 kg |
176 cm |
Very active |
About 3,210 kcal |
Formula Used
Original men: BMR = 66.4730 + 13.7516W + 5.0033H − 6.7550A.
Original women: BMR = 655.0955 + 9.5634W + 1.8496H − 4.6756A.
Revised men: BMR = 88.362 + 13.397W + 4.799H − 5.677A.
Revised women: BMR = 447.593 + 9.247W + 3.098H − 4.330A.
W means weight in kilograms. H means height in centimeters. A means age in years. TDEE equals selected BMR multiplied by the activity factor. Target calories equal TDEE plus the selected goal adjustment.
How to Use This Calculator
- Select sex, age, unit system, height, and weight.
- Choose the activity level that best matches your usual week.
- Select the original, revised, or averaged equation option.
- Pick a goal, or enter a custom calorie adjustment.
- Set protein, fat, and meal preferences for macro planning.
- Press the submit button to show results above the form.
- Use the CSV or PDF buttons to save your result.
Understanding the Cornell Harris Benedict Method
The Harris Benedict equation estimates basal metabolic rate. Basal metabolic rate is the energy your body uses at rest. Cornell nutrition teaching often uses it as a clear classroom model. It connects age, sex, height, and weight with daily energy planning.
Why BMR Matters
BMR is not your full daily calorie need. It is the starting number. Activity raises that number. Exercise, walking, standing, and labor all change total daily energy expenditure. This calculator multiplies BMR by a selected activity factor. It then applies a goal adjustment.
Useful Inputs
Accurate inputs create better estimates. Use current body weight. Use measured height. Choose the activity level that describes your usual week. Do not choose an intense level for one hard workout. Consistency matters more than optimism. The calculator accepts metric and imperial units, then converts them internally.
Goal Planning
A maintenance goal keeps target calories near total expenditure. A fat loss goal subtracts calories. A muscle gain goal adds calories. Small changes are easier to follow. Large cuts may reduce energy and training quality. Large surpluses may add unwanted fat. Review progress every two weeks.
Macro Guidance
Protein supports muscle repair and fullness. Fat supports hormones and vitamin absorption. Carbohydrates fuel training and daily work. This tool estimates grams from your calorie target. You can change protein per kilogram and fat percent. Carbohydrates fill the remaining calories.
Interpreting Results
Every result is an estimate. Metabolism changes with sleep, stress, illness, muscle mass, and dieting history. Track body weight trends, not one daily reading. Compare your real progress with the calculated target. Adjust slowly when results stall. This practical approach makes the equation useful beyond the first calculation.
Best Use
Use the calculator before starting a diet plan. Save the result as a record. Recheck when weight changes by several kilograms. Also recalculate after a major training change. The equation is strongest when paired with honest tracking, balanced meals, and regular movement.
Safety Note
Adults with medical conditions need personal guidance. Athletes may require sport specific plans. Pregnant users need professional advice. Use these numbers as planning estimates, not strict medical instructions. Monitor comfort and hunger.
Frequently Asked Questions
What does this calculator estimate?
It estimates basal metabolic rate, daily energy needs, goal calories, macros, BMI, and related planning values using Harris Benedict equations.
Which equation version should I use?
The revised version is a common modern choice. The original is useful for comparison. The average option gives a middle estimate.
What is BMR?
BMR means basal metabolic rate. It estimates calories your body uses at rest for breathing, circulation, temperature control, and basic function.
What is TDEE?
TDEE means total daily energy expenditure. It multiplies BMR by an activity factor to estimate full daily calorie needs.
Can I use pounds and inches?
Yes. Select the imperial option. Enter weight in pounds and height in total inches. The calculator converts them internally.
How are macros calculated?
Protein uses grams per kilogram. Fat uses a selected calorie percent. Carbohydrates receive remaining calories after protein and fat.
Is this medical advice?
No. It is an educational planning tool. People with medical needs should ask a qualified clinician or dietitian for personal guidance.
How often should I recalculate?
Recalculate after weight changes, training changes, or goal changes. Many users review results every two to four weeks.