Health Calculator
Enter height, weight, age, and activity once to estimate several everyday health metrics on one screen.
Health calculator
Enter your basics once to estimate BMI, resting calories, daily energy, water intake, and exercise heart-rate range together.
This calculator is for everyday reference only. It does not replace medical diagnosis or treatment advice.
Integrated results
Each card updates as soon as the required inputs are valid. Open the detail area when you want the formula context or a simpler explanation.
Enter height and weight to calculate BMI.
Open explanation
BMI needs both height and weight.
Add sex, age, height, and weight to estimate resting calorie needs.
Open explanation
BMR needs sex, age, height, and weight.
Choose an activity level after entering sex, age, height, and weight.
Open explanation
TDEE needs the same inputs as BMR plus an activity level.
Enter body weight to estimate a daily water target.
Open explanation
Water guidance needs body weight first.
Add age and exercise intensity to estimate a training heart-rate zone.
Open explanation
Target heart rate needs age and exercise intensity.
Next actions based on your current numbers
Use these numbers as general lifestyle guidance only. If a result seems concerning, confirm it with a qualified clinician.
Formula notes
These formulas are simple planning references for healthy adults. They are useful for trend checks, not diagnosis.
- BMI: weight (kg) / height (m)^2
- BMR: Mifflin-St Jeor equation
- TDEE: BMR multiplied by an activity factor
- Water: body-weight baseline plus a simple exercise adjustment
- Target heart rate: 220 - age, then intensity percentages
Frequently asked questions
FAQ blocks stay in the default page structure to provide the level of explanation these entry points need.
- Can these results replace medical advice?
No. This tool is for general lifestyle reference only. If a result feels concerning, confirm it with a qualified clinician.
- What is the difference between BMI, BMR, and TDEE?
BMI is a basic weight-status reference, BMR estimates resting calorie needs, and TDEE estimates total daily energy use after activity is included.
- How should I choose my activity level?
Pick the option that feels closest to your normal week, from mostly sedentary to very active. The tool includes short examples under each activity level.
Search guides
These extra pages target the specific phrases people search before opening the tool.
BMI Calculator
Calculate BMI from height and weight and quickly read the basic weight range.
Health CalculatorBMR Calculator
Estimate basal metabolic rate from age, sex, height, and weight.
Health CalculatorTDEE Calculator
Estimate total daily energy expenditure by combining BMR with an activity level.
Health CalculatorDaily Water Intake Calculator
Estimate a practical daily water intake target from body weight and activity level.