健康
BMI、カロリー、理想体重などの健康計算。
5種類の計算機
健康
BMI Calculator
BMI (Body Mass Index) gives a quick indication of whether your weight is appropriate for your height. Enter your weight and height to see your category instantly, along with an explanation of the formula behind it. Note: this is a general estimate, not medical advice.
BMR Calculator
Your basal metabolic rate (BMR) is the number of calories your body burns per day at complete rest. This number is the foundation for nutrition and fitness planning: multiply it by your activity factor to determine your total daily energy expenditure (TDEE).
Calorie Calculator (TDEE)
Your TDEE (total daily energy expenditure) is the number of calories you burn per day, including activity. This figure is your starting point for maintaining, losing or gaining weight.
Body Fat Calculator
The US Navy method estimates your body fat percentage with just a tape measure, no calipers needed. Enter your waist, neck, height (and, for women, hip circumference) for an indication.
Water Intake Calculator
Hydration is essential for body function. How much water you need depends on your weight, activity level, climate and health. This calculator computes your daily water intake based on scientific research.
Health can partly be expressed in numbers: your BMI, your calorie needs, your ideal weight or how much water you need per day. This category offers free calculators that make those numbers understandable.
The tools use recognised formulas (such as Mifflin-St Jeor for metabolism) and explain what a result does and does not mean — because a number is a starting point, not a diagnosis.
Overview
Calculate your BMI, basal metabolic rate (BMR), calorie needs, body-fat percentage, ideal weight and water intake. Together they give a complete picture for healthy goals.
How to use these calculators
- 1Pick the health calculator you need.
- 2Enter your height, weight, age and sex where asked.
- 3Read the explanation to put the result in context.
Common mistakes
- Using BMI as the only measure; it ignores muscle mass.
- Confusing calorie needs with a strict diet target.
- Mixing up centimetres and metres for height in BMI.
Tips
- Combine several measures (BMI + body fat) for a fairer picture.
- When in doubt, always consult a doctor or dietitian.
よくある質問
Are these health calculators medical advice?
No. They give an indication based on standard formulas and do not replace a doctor or dietitian.
Which BMI is healthy?
For adults a BMI of 18.5 to 25 is generally considered healthy, with nuances by age and build.
Do the tools work without an account?
Yes, everything is free and anonymous; your data stays on your device.