My Fitness Pal Nutrition Calculator

Estimate calories, macros, BMI, water, and meal goals. Review targets before planning your daily food. Use clear numbers to guide smarter nutrition choices today.

Nutrition Calculator Form

cm
kg
%
%
%
g
g
g
L

Example Data Table

Profile Weight Activity Goal Protein Carbs Fat
Sample adult 75 kg Moderate Steady fat loss 30% 40% 30%
Active learner 68 kg Light Maintain weight 25% 45% 30%
Strength goal 82 kg Very active Slow muscle gain 32% 43% 25%

Formula Used

BMR for men: 10 × weight kg + 6.25 × height cm - 5 × age + 5.

BMR for women: 10 × weight kg + 6.25 × height cm - 5 × age - 161.

Maintenance calories: BMR × activity multiplier.

Goal calories: maintenance calories + selected goal adjustment.

Protein grams: calories × protein percent ÷ 100 ÷ 4.

Carbohydrate grams: calories × carbohydrate percent ÷ 100 ÷ 4.

Fat grams: calories × fat percent ÷ 100 ÷ 9.

BMI: weight kg ÷ height meters squared.

Water estimate: weight kg × 35 ml, plus exercise water.

How to Use This Calculator

Enter your age, height, weight, gender estimate, and activity level.

Select a goal that matches your plan. Choose slower targets for easier consistency.

Enter your desired protein, carbohydrate, and fat percentages.

Add meals per day to divide your targets into simple meal budgets.

Enter today’s food intake if you want remaining calories and macros.

Press the calculate button. The result appears below the header and above the form.

Use the CSV or PDF buttons to save your nutrition report.

Nutrition Planning Guide

Why Daily Targets Matter

This nutrition calculator helps you plan daily food targets with care. It turns body details, activity, and goals into clear numbers. You can estimate maintenance calories, goal calories, and macro grams. You can also compare those targets with food already eaten.

How Energy Needs Are Estimated

The tool uses the Mifflin St Jeor equation for basal metabolic rate. BMR is the energy your body may use at rest. Activity then raises that value to estimate daily energy needs. A goal adjustment is added for weight loss, maintenance, or gain. The final number becomes the daily calorie target.

How Macros Are Planned

Macros divide those calories into protein, carbohydrates, and fat. Protein and carbohydrates use four calories per gram. Fat uses nine calories per gram. The calculator also estimates fiber, water, sugar limit, and saturated fat limit. These values help you build meals with more balance.

Meal Planning Benefits

Meal planning becomes easier when targets are split across the day. You can enter meals per day and review an average meal budget. This helps breakfast, lunch, dinner, and snacks stay realistic. It also reduces guesswork when building a food diary.

Daily Tracking

The intake fields are optional. Add calories and macros already eaten today. The calculator shows what remains. It also shows whether you are close to your plan. This makes it useful for meal prep, diet tracking, or quick daily checks.

Use Estimates Carefully

Use the numbers as planning estimates. Human needs vary by sleep, stress, training, hormones, and health status. Packaged foods may also have rounding differences. For medical diets, pregnancy, diabetes, kidney disease, or eating disorder recovery, ask a qualified professional before changing intake.

Build Better Habits

A good nutrition plan should feel practical. Start with consistent logging. Choose simple meals. Add lean protein, grains, fruit, vegetables, and healthy fats. Review weekly averages instead of one strict day. Small adjustments are often easier to maintain than extreme changes.

Adjust Slowly

Good targets should also respect hunger and routine. If a target feels too low, review the goal speed. Slow progress can protect energy and training quality. If weight is not changing after several weeks, compare logged intake with actual portions. Weighing foods for a short period can improve accuracy. Then adjust calories gently. Keep protein steady, drink enough water, and choose meals you can repeat without stress during busy weeks.

FAQs

Is this calculator connected to any fitness app?

No. It is an independent planning tool. It uses common nutrition formulas to estimate calories, macros, water, fiber, and intake gaps.

Which calorie formula does it use?

It uses the Mifflin St Jeor equation for BMR. Then it multiplies BMR by your selected activity level to estimate maintenance calories.

Can I use this for weight loss?

Yes. Choose a fat loss goal. The calculator subtracts calories from maintenance. Slower options are often easier to follow consistently.

Can I change macro percentages?

Yes. Enter your own protein, carbohydrate, and fat percentages. The tool normalizes them if the total is not exactly one hundred.

Why are protein and carbs divided by four?

Protein and carbohydrates provide about four calories per gram. Fat provides about nine calories per gram, so its formula is different.

Are the water targets exact?

No. Water needs vary by heat, sweat, food, health, and activity. The result is a practical daily estimate for planning.

Should I follow these numbers every day?

Use them as flexible targets. Weekly averages often matter more than one perfect day. Adjust slowly based on real progress.

Can this replace a dietitian?

No. It is only a calculator. For medical conditions, pregnancy, sports nutrition, or eating disorder recovery, consult a qualified professional.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.