Ideal Weight Calculator

Explore formula-based adult weight estimates for your height. Enter your own values below to see weight at BMI 22 and check the method behind it.

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Your inputs

Change the example values to match your situation.

Your result

Let’s work it out.

Fill in your inputs and select Calculate.
Your result and breakdown will appear here.

How this calculator works

Reference weights = selected BMI × height in metres squared. This is a BMI-based range, not an individually prescribed ideal weight.

Before you use the result

  • Estimates for general information. They do not diagnose a condition or replace a qualified clinician’s assessment.

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What is Ideal Weight Calculator?

Ideal Weight Calculator helps you explore formula-based adult weight estimates for your height.

The main result is weight at BMI 22, with a breakdown of weight at BMI 18.5 and weight at BMI 24.9. The formula, example and assumptions below explain how to interpret it.

How to use Ideal Weight Calculator

Use the example to get familiar with the form, then enter your own figures. Any rates in the example are illustrative. Check the field labels and units before calculating.

  1. Gather adult height (cm). Use values from the same situation or reporting period.
  2. Replace the example adult height with your own value, then complete the other fields. Check the displayed units.
  3. Select Calculate and read weight at BMI 22 with its result breakdown. Change one input and calculate again to compare a second scenario. Reset restores the original example.
  • Enter adult height in cm, at least 100 and at most 250. Decimals are accepted.

Ideal Weight Calculator: a worked example

With the inputs below, the result is 63.58 kg (weight at BMI 22). Follow the example, then replace these illustrative values with your own.

Example inputs and output
Input or outputExample value
Adult height (cm)170 cm
Weight at BMI 2263.58 kg
Weight at BMI 18.553.465 kg
Weight at BMI 24.971.961 kg

Understanding the Ideal Weight result

Read weight at BMI 22 alongside weight at BMI 18.5 and weight at BMI 24.9. These describe different parts of the same calculation.

Displayed results use a readable number of decimal places. When checking a result by hand, keep extra precision until the last step. To compare scenarios, change one input at a time and keep the others fixed.

  • Example Weight at BMI 18.5: 53.465 kg
  • Example Weight at BMI 24.9: 71.961 kg

Ideal Weight Calculator: assumptions and common mistakes

A useful estimate starts with the right inputs. Check the following assumptions and limits before applying the result to your situation.

  • Estimates for general information. They do not diagnose a condition or replace a qualified clinician’s assessment.
  • Health estimates are context-dependent. Age, pregnancy, illness, medication and individual measurements can affect interpretation; these tools do not diagnose a condition.

For wider guidance, visit World Health Organization. The formula and scope of this specific tool are stated on this page.

Ideal Weight Calculator FAQs

What does Ideal Weight Calculator calculate?

Ideal Weight Calculator helps you explore formula-based adult weight estimates for your height. Its main output is weight at BMI 22 in kg.

What inputs do I need for Ideal Weight Calculator?

You need adult height (cm). Use the field labels and units to match your figures to the formula.

Which formula does Ideal Weight Calculator use?

Reference weights = selected BMI × height in metres squared. This is a BMI-based range, not an individually prescribed ideal weight.

What is a worked example for Ideal Weight Calculator?

Example inputs: Adult height: 170 cm. The result is 63.58 kg (weight at BMI 22).

How should I enter adult height?

Enter adult height in cm, at least 100 and at most 250. Decimals are accepted.

Why might the displayed result be rounded?

The result display limits decimal places to keep numbers readable. Very small values may use scientific notation. Keep extra precision during a manual calculation, then round the final answer for comparison.

How should I read weight at BMI 22?

Read weight at BMI 22 alongside weight at BMI 18.5 and weight at BMI 24.9. These describe different parts of the same calculation.

Why might my Ideal Weight Calculator result differ from my records?

Estimates for general information. They do not diagnose a condition or replace a qualified clinician’s assessment. Differences in entered values, units or rounding can also change the comparison.

Can I compare two scenarios in Ideal Weight Calculator?

Yes. Note your first weight at BMI 22, change adult height or another input, and select Calculate again. Editing a field clears the old result so it is not mistaken for a new calculation.

Is Ideal Weight Calculator free, and where are my inputs calculated?

This calculator is free to use without signing in. Its formula runs in your browser; calculator inputs are not sent to a calculation API. The inputs reset to the example values when you reset the form or start a fresh page.