Full Body Analysis Calculator
Enter your measurements, age, resting heart rate, activity level, and fitness goal to estimate BMI, body composition, calorie needs, and training heart rate.
Complete Body Profile Calculator
Full Body Analysis Formula
Where:
- \(W\) — weight in kilograms; \(H\) — height in meters; \(H_{cm}\) — height in centimeters.
- \(C_w\) and \(C_h\) — waist and hip circumferences in the same unit; \(E_{cm}\) — elbow width in centimeters.
- \(F\) — frame ratio; \(I\) — baseline ideal weight in kilograms; \(P\) — estimated body fat percentage.
- \(A\) — age in years; \(L\) — selected activity multiplier; \(R\) — resting heart rate in beats per minute.
The calculator adjusts ideal weight by −5 kg for a small frame or +5 kg for a large frame. Its target heart rate always uses 70% of heart-rate reserve; the Fitness goal selection does not change the calculations.
Full Body Analysis – Calculation Example
Example: Using the defaults—Men, 70 kg, 170 cm, age 30, resting heart rate 70 bpm, waist 80 cm, hip 95 cm, elbow width 6 cm, and Moderately Active—the calculator estimates:
\[\mathrm{BMI}=\frac{70}{1.70^2}=24.22,\qquad \mathrm{WHR}=\frac{80}{95}\approx0.84\]
\[F=\frac{170}{6}\approx28.33\ \text{(small frame)},\qquad I=50+2.3\left(\frac{170-152.4}{2.54}\right)-5\approx60.94\ \mathrm{kg}\]
\[P\approx19.77\%,\qquad \mathrm{Fat\ mass}\approx13.84\ \mathrm{kg},\qquad \mathrm{Lean\ mass}\approx56.16\ \mathrm{kg}\]
\[\mathrm{RMR}=1617.5\ \mathrm{kcal/day},\qquad \mathrm{Daily\ calories}=1617.5(1.55)\approx2507.13\ \mathrm{kcal/day}\]
\[\mathrm{Max\ HR}=190\ \mathrm{bpm},\qquad \mathrm{Target\ HR}=70+0.70(190-70)=154\ \mathrm{bpm}\]
Result: BMI 24.22 (Normal), WHR 0.84 (classified as Pear), estimated ideal weight 60.94 kg, and target heart rate 154 bpm. The WHR result is a ratio, even though the calculator displays a percent sign beside it.
How to use the calculator
- Choose Unit system. Select Metric for the most reliable results; see the unit limitation below before using English.
- Choose Gender from Men or Women. This selects the calculator’s formula constants and frame-size thresholds.
- Enter Weight, Height, and Age.
- Enter your Resting heart rate average in beats per minute. A measurement taken while relaxed and at rest is more useful than one taken immediately after activity.
- Measure and enter Waist, Hip, and Elbow width. Use the same unit for waist and hip.
- Select your Activity level and Fitness goal, then read the results. Activity level changes the daily calorie estimate; Fitness goal currently has no effect on any result.
What the results mean
BMI relates weight to height. The calculator labels values below 18.5 Underweight, 18.5 to less than 25 Normal, 25 to less than 30 Overweight, and 30 or above Obese. BMI cannot distinguish muscle from fat. For a closer look at this one measure, see the Body Mass Index calculator.
Waist-to-hip ratio compares waist and hip circumference. The displayed number is a decimal ratio: 0.84 means the waist measures 84% of the hips, not 0.84%. The calculator assigns Apple when the ratio exceeds 0.9 for Men or 0.8 for Women; otherwise, it assigns Pear. These are simple labels based on one measurement ratio, not a description of your overall appearance or a diagnosis. A waist-to-height ratio provides another way to put waist size in context.
Body frame size comes from height divided by elbow width. The calculator uses that category to adjust its Devine-based ideal weight estimate, which is a formula output rather than a personal weight target. Estimated body fat percentage comes from BMI and age; fat mass and lean mass are then calculated from your weight. They are not direct measurements of body composition. If you have measured body fat separately, compare it with the Body Fat calculator rather than treating this estimate as exact.
Resting metabolism estimates energy use at rest. Daily metabolism multiplies that estimate by your selected activity level to approximate maintenance calories. Although the results say “cal/day,” their numerical values represent dietary Calories, or kilocalories per day. Target heart rate uses a fixed 70% of the difference between estimated maximum and resting heart rates, added back to resting heart rate. The per-hour calorie results divide daily values by 24; heart-rate results per 10 seconds divide beats per minute by six.
Assumptions and limitations
Use Metric for dependable calculations. In English mode, the calculator converts height from inches but uses the entered weight number as though it were kilograms. It also mixes converted height with elbow width entered in inches. This makes BMI, frame size, ideal weight, body composition, and calorie estimates unreliable in English mode; some outputs remain labeled in kilograms. Convert your measurements to kilograms and centimeters and select Metric instead.
The body fat estimate uses a BMI-and-age equation, not a skinfold, waist-based, or laboratory measurement. The ideal-weight formula is extrapolated for heights below 152.4 cm (5 ft). Both estimates can be less informative for people whose body composition differs substantially from the populations represented by the formulas. For a focused assessment of the elbow measurement, use the Frame Size calculator.
The maximum-heart-rate rule, \(220-A\), is a broad population estimate; an individual’s actual maximum can differ considerably. Likewise, activity multipliers provide a starting estimate, not a measured calorie requirement. Watch how your weight, training response, and recovery change over time before adjusting food intake or exercise intensity. Seek individualized guidance when a medical condition or medication affects exercise or heart rate.
Frequently Asked Questions
How do I convert pounds and inches before using this calculator?
Select Metric after converting your measurements. Divide pounds by 2.20462 to get kilograms, and multiply inches by 2.54 to get centimeters. For example, 180 lb is about 81.65 kg, and 68 in is 172.72 cm. Convert waist, hip, and elbow measurements to centimeters too. This avoids the calculation errors that can occur in English mode.
Where should I measure my waist, hips, and elbow width?
Measure your waist around your abdomen, just above the hip bones, after breathing out normally. Measure your hips around the widest part of your buttocks. Keep the tape level and snug without compressing the skin. For elbow width, measure across the two bony points of a bent elbow, ideally with calipers; a tape measure around the elbow is not the same measurement.
What is a healthy body fat percentage?
There is no single ideal percentage for everyone: typical ranges differ by sex, age, and athletic background. Broadly, values around 10–20% for adult men and 20–30% for adult women are often seen in healthy populations, but those ranges are not diagnostic cutoffs. This calculator estimates body fat indirectly from BMI and age, so do not treat a small difference from a reference range as a measured health problem.
What is a normal resting heart rate, and should I use a lower number if I exercise?
For most adults, a resting heart rate of 60–100 beats per minute is common; well-trained people may be below 60. Enter your actual resting average, not a number adjusted for your fitness level. Measure it while calm, preferably at the same time on several mornings. If your rate is unusually high or low for you, especially with symptoms, seek medical advice.
How should I choose an activity level if my exercise varies by day?
Choose the level that best represents your usual week, including both workouts and movement outside exercise. A desk job with a few workouts may warrant a lower multiplier than a physically demanding job, even if the workouts are similar. If your schedule changes substantially, calculate a separate estimate for each routine. Compare the result with your weight trend over several weeks rather than treating the multiplier as an exact measurement.
Are the daily calories a weight-loss target or a maintenance estimate?
They are a starting estimate for maintaining your current weight at the selected activity level. To lose weight, a modest calorie deficit may be appropriate; to gain weight, a surplus may be appropriate. Your actual needs can differ from the estimate, so monitor changes over time rather than making large adjustments from one calculation. A clinician or registered dietitian can help if you have medical or nutritional concerns.
Can children, pregnant people, or competitive athletes rely on these results?
Not as a personal assessment. Children and teenagers need age- and sex-specific growth references, while pregnancy changes the interpretation of weight, body composition, and calorie needs. Competitive athletes may also have a BMI or estimated body fat percentage that poorly reflects their actual composition. These results are general adult estimates; use appropriate professional guidance when those circumstances apply.