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Body Fat Calculator vs Body Fat 3-Site Skinfold Calculator

Both Body Fat Calculator and Body Fat 3-Site Skinfold Calculator sit in the Health & Medical category. They share an underlying model (us navy body-fat formula) but target different outcomes: Body Fat on one side, Body Fat 3-Site Skinfold on the other.

Body Fat Calculator and Body Fat 3-Site Skinfold Calculator comparison illustration

Photo: Jenny Hill on Unsplash

The two tools at a glance

Body Fat Calculator

Body Fat Calculator computes body fat directly in your browser. It is built for body fat estimate and uses us navy body-fat formula based on the inputs you provide.

Use it when

  • Tracking a health metric across a programme
  • Comparing your value against a reference range
  • Sizing a daily target before a doctor visit
Math model. Reference table lookup with linear interpolation.
Open Body Fat Calculator

Body Fat 3-Site Skinfold Calculator

Body Fat 3-Site Skinfold Calculator computes body fat 3-site skinfold directly in your browser. It is built for body fat estimate and uses us navy body-fat formula based on the inputs you provide.

Use it when

  • Tracking a health metric across a programme
  • Comparing your value against a reference range
  • Sizing a daily target before a doctor visit
Math model. Reference table lookup with linear interpolation.
Open Body Fat 3-Site Skinfold Calculator

Side by side: every attribute

AttributeBody Fat CalculatorBody Fat 3-Site Skinfold Calculator
CategoryHealth & MedicalHealth & Medical
Primary inputSex, age, weight, neck, waist, hipSex, age, weight, neck, waist, hip
Primary outputBody fat %, categoryBody fat %, category
Math modelUS Navy body-fat formulaUS Navy body-fat formula
Best forBody fat estimateBody fat estimate
Runs in browserYes, no data leaves your deviceYes, no data leaves your device
Login requiredNoNo
CostFreeFree

How they differ

Under the hood, Body Fat Calculator uses us navy body-fat formula fed by sex, age, weight, neck, waist, hip. Body Fat 3-Site Skinfold Calculator uses us navy body-fat formula fed by sex, age, weight, neck, waist, hip. The two are not substitutes; they answer adjacent questions in your workflow.

Pick Body Fat Calculator when your question is about body fat and your inputs are sex, age, weight, neck, waist, hip. Pick Body Fat 3-Site Skinfold Calculator when the question shifts to body fat 3-site skinfold and your inputs become sex, age, weight, neck, waist, hip. If neither matches what you need, the Health & Medical category hub lists every tool we have for related questions.

Which one should you use?

Choose Body Fat Calculator if

Your task is personal health metric estimation and you already have height, weight, age, sex, activity. The output you need is a score, range, daily target.

Choose Body Fat 3-Site Skinfold Calculator if

Your task is personal health metric estimation and you have height, weight, age, sex, activity. The output you need is a score, range, daily target.

Neither fits?

Browse the Health & Medical hub for related tools, or the Health & Medical hub for the other side.

Frequently asked questions

What is the difference between Body Fat Calculator and Body Fat 3-Site Skinfold Calculator?

Body Fat Calculator is designed to answer questions about body fat using sex, age, weight, neck, waist, hip. Body Fat 3-Site Skinfold Calculator is designed for body fat 3-site skinfold using sex, age, weight, neck, waist, hip. They are complementary tools that target different inputs and outputs.

When should I use Body Fat Calculator?

Use Body Fat Calculator when your task is body fat estimate and you need a body fat %, category from sex, age, weight, neck, waist, hip.

When should I use Body Fat 3-Site Skinfold Calculator instead?

Use Body Fat 3-Site Skinfold Calculator when the question is body fat estimate and your inputs are sex, age, weight, neck, waist, hip. The result is a body fat %, category.

Are Body Fat Calculator and Body Fat 3-Site Skinfold Calculator free?

Yes. Both run entirely in your browser, require no login, and are free to use without limits. Your inputs are not transmitted to any server.

Is one more accurate than the other?

Accuracy depends on the inputs you provide, not on the tool. Body Fat Calculator uses us navy body-fat formula and is accurate for body fat when its inputs are correct. Body Fat 3-Site Skinfold Calculator uses us navy body-fat formula and is accurate for body fat 3-site skinfold under the same condition.

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