Health & Fitness Calculators

BMI Calculator

Find your Body Mass Index instantly using metric or imperial measurements — with your weight category and healthy weight range.

Calculate Now

Calorie Calculator

Get your exact daily calorie target for weight loss, maintenance, or muscle gain — based on your age, height, weight, and activity level.

Calculate Now

BMR Calculator

Calculate how many calories your body burns at complete rest using the gold-standard Mifflin-St Jeor equation.

Calculate Now

Body Fat Calculator

Estimate your body fat percentage using the US Navy method — just simple tape measure readings, no gym equipment needed.

Calculate Now

Ideal Weight Calculator

Find your healthy weight range based on your height, age, and frame size — using multiple recognised reference formulas.

Calculate Now

TDEE Calculator

Calculate your Total Daily Energy Expenditure — the real number of calories you burn each day once activity level is factored in.

Calculate Now

Calorie Deficit Calculator

Find out exactly how much to eat to reach your goal weight by a specific date — based on your TDEE and target deficit.

Calculate Now

Water Intake Calculator

Get a personalised daily hydration target based on your weight and activity level — in litres or fluid ounces.

Calculate Now

Protein Intake Calculator

Find your exact daily protein target in grams — whether your goal is fat loss, muscle gain, or weight maintenance.

Calculate Now

Macro Calculator

Find your daily protein, carb, and fat targets using a protein-first method based on body weight, or a diet-preset ratio like balanced, high-protein, low-carb, or keto.

Calculate Now

Protein Calculator

Find your daily protein needs for muscle gain, fat loss, endurance, or maintenance — based on body weight or lean body mass, with a per-meal breakdown and food source guide.

Calculate Now

About Our Health & Fitness Calculators

Whether you want to lose weight, build muscle, track your nutrition, or simply understand your body better, our 9 free health and fitness calculators give you instant, science-backed results — no app download, no account, and no sign-up required.

Start with our free BMI calculator to find your Body Mass Index in metric or imperial — with your weight category and healthy weight range. The calorie calculator gives your exact daily calorie target for weight loss, maintenance, or muscle gain based on your age, height, weight, and activity level. The BMR calculator tells you how many calories your body burns at complete rest using the gold-standard Mifflin-St Jeor equation.

The TDEE calculator goes further — calculating your Total Daily Energy Expenditure once activity level is factored in. Pair it with the calorie deficit calculator to find exactly how much to eat to reach your goal weight by a specific date. The body fat calculator uses the US Navy method to estimate your body fat percentage from simple tape measure readings — no gym equipment needed.

Use the ideal weight calculator to find your healthy weight range by height, age, and frame size. The water intake calculator gives you a personalised daily hydration target. And the protein intake calculator tells you exactly how many grams of protein to eat daily — whether your goal is fat loss, muscle gain, or maintenance. All tools support metric and imperial units, work on any device, and store none of your data.

  • BMI calculator — metric & imperial, instant result
  • Calorie calculator — weight loss, gain & maintenance
  • BMR calculator — Mifflin-St Jeor formula
  • Body fat calculator — US Navy method
  • Ideal weight calculator — by height & frame size
  • TDEE calculator — total daily calories burned
  • Calorie deficit calculator — reach your goal weight
  • Water intake calculator — personalised hydration target
  • Protein intake calculator — fat loss & muscle gain
  • Macro calculator — Protein, Carb & Fat Breakdown

Browse Other Calculator Categories

💰 Finance & Loan Calculators
➗ Math & Statistics Calculators
💼 Business & Tax Calculators
🏠 Home & Lifestyle
🔄 Unit Converters

Frequently Asked Questions

A healthy BMI for adults is between 18.5 and 24.9. A BMI below 18.5 is considered underweight, 25–29.9 is overweight, and 30 or above is classified as obese. BMI is a useful screening tool but does not account for muscle mass. Use our free BMI calculator to find your number instantly — metric and imperial both supported.
To lose weight sustainably, most adults need to eat 300–500 fewer calories than their Total Daily Energy Expenditure (TDEE). For example, if your TDEE is 2,200 calories, eating 1,700–1,900 calories per day produces steady fat loss of approximately 0.5–1 lb per week. Use our free calorie calculator to get your personalised daily target.
BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest to maintain basic functions like breathing and circulation. It is calculated using the Mifflin-St Jeor equation — the gold standard for BMR estimation. For men: (10 × weight kg) + (6.25 × height cm) − (5 × age) + 5. For women: the same formula minus 161. Use our free BMR calculator to get your result instantly.
Healthy body fat ranges vary by gender. For women, 21–33% is considered healthy. For men, 8–19% is the healthy range. Athletes typically have lower percentages: 14–20% for women and 6–13% for men. Use our free body fat calculator — it uses the US Navy method and requires only simple tape measure readings.
BMR is the calories your body burns at rest. TDEE (Total Daily Energy Expenditure) is your BMR multiplied by your activity factor — it represents the total calories you burn in a full day including all movement and exercise. TDEE is always higher than BMR and is the correct number to base your calorie intake on. Use our free TDEE calculator to find yours in seconds.
The general recommendation is 35ml of water per kg of body weight per day. For a 70kg person, that is approximately 2.45 litres (about 8 cups). Active individuals, those in hot climates, and pregnant women need more. Use our free water intake calculator for a personalised target based on your weight and activity level.
For muscle gain, research recommends 1.6–2.2g of protein per kg of bodyweight daily. For a 75kg person, that is 120–165g of protein per day. For weight loss while preserving muscle, aim for the higher end of this range. Use our free protein intake calculator to get your personalised daily protein target.
Yes — all 9 health and fitness calculators on EverydayCalcPro are completely free. No account required, no subscription, no hidden fees. All tools support metric and imperial units and work on desktop, tablet, and mobile.