Direct answer
Convert height between centimeters, inches, and feet, or calculate a clearly labeled mid-parental target-height range without presenting it as a growth diagnosis.
Height Calculator
Height result
Enter your values, then calculate to see a verified result.
Reference range
How this result is calculated
A clear calculation path based on your inputs.
Inputs usedReview the information used for this result.
Full calculation and sourcesReview the selected mode, source measurement or parental heights, child-sex formula, converted values, and target range.
Versioned calculationFormula v3.2.0
Transparent method
Review the selected mode, source measurement or parental heights, child-sex formula, converted values, and target range.
A conversion is exact; a family-height estimate is not
Unit conversion reports the same measurement in other units. Mid-parental mode gives a broad target range and is not a diagnosis or guarantee of adult height.
Choose the jobSeparate conversion from prediction
They are not equivalentNormalize heightsConvert measurements to meters
1 in = 2.54 cmDisplay scopeShow exact conversion or a rough estimate
Prediction is not a guaranteeInterpretation
The result is . Conversion and mid-parental estimate modes remain clearly separated.
Review the selected mode, source measurement or parental heights, child-sex formula, converted values, and target range.
Unit conversion reports the same measurement in other units. Mid-parental mode gives a broad target range and is not a diagnosis or guarantee of adult height.
Use this result
Continue with your result
Compare, save, or take the next step
Did we solve your problem?Your feedback helps us improve this calculator.
Report a calculation issue Keep exploring
Related calculators and resources
Method and test recordFormula v3.2.0
- Recorded scope
- Mid-parental formulas provide a rough familial estimate. Khamis-Roche uses a child's current age, sex, height and weight plus parental heights and was developed from a specific reference population. It should not be applied outside its supported ages or described as universally validated.
- Publisher
- CalculatorGeek
- Recorded review date
- 2026-09-08
- Next source review
- 2027-09-08
- Definition fixtures
- 3 configured scenarios
- Published examples
- 3 shown below
Recorded method
Content package, legacy implementation, formulas, units, boundary behavior, sources, and fixtures are reviewed separately before release.
These records describe the published model and reference tests. A test-case count is not a certification of every possible input or an independent specialist review. Editorial policy
Known limitations
- Publish after conversion and prediction modes are separated, method eligibility is enforced, and every estimate is displayed as a range rather than a guarantee.
Method sources
Latest model update
2026-09-23 - Added the unified premium result bridge, task-specific interpretation, source boundary, and refreshed semantic answer coverage.
Reference inputs and expected results
These published examples are separate from the configured definition fixtures and any additional automated assertions. Expected values use the stated output units; invalid inputs are intended to be rejected.
| Case | Inputs | Expected result |
|---|---|---|
| Direct conversion | result_cm=172.72, result_in=68 | |
| Male mid-parental estimate | result_cm=178, lower_cm=167.84, upper_cm=188.16 | |
| Female mid-parental estimate | result_cm=165, lower_cm=154.84, upper_cm=175.16 |
Report an issue with this tool. Include the page URL, units, expected answer, and steps to reproduce. Do not include sensitive personal information.
On this page
Separate conversion from prediction
Place exact conversion in one mode and growth prediction in another. For conversion, 1 inch = 2.54 cm exactly. For prediction, collect only inputs supported by the selected method and explain eligibility before users calculate.
Continue with the Compare percentile with prediction. Separate a current growth reference from an adult-height estimate.
Mid-parental and Khamis-Roche methods
Mid-parental formulas provide a rough familial estimate. Khamis-Roche uses a child's current age, sex, height and weight plus parental heights and was developed from a specific reference population. It should not be applied outside its supported ages or described as universally validated.
Continue with the Convert height units. Verify feet, inches and centimeters.
Show uncertainty and method limits
Display a central estimate plus the method's documented prediction interval or an explicitly labeled broad planning range. Genetics, puberty timing, health, nutrition and population differences influence adult height. A calculator cannot assess growth velocity or diagnose a growth disorder.
Use growth charts for current growth
For children, current height percentile and growth over time should be assessed with age- and sex-appropriate CDC or WHO charts. Percentile is not an adult-height prediction. Concerns about growth pattern belong with a pediatric clinician.
Formula, precision and QA disclosure
CalculatorGeek normalizes units before applying the named formula, retains working precision through intermediate steps and rounds the displayed result once. Inputs outside the supported domain must return a clear no-result or warning state; they must not be silently forced into a plausible-looking answer.
Inputs, outputs and result meaning
Calculates height, total inches, decimal feet, and lower target boundary from calculation mode, measured height, mother height, and father height with visible method, validation, precision, and limitations.
Inputs
- Calculation mode
- Choose direct conversion or a broad family-height estimate. Available choices are Convert a measured height and Mid-parental target height.
- Measured height
- Height to convert. Supported units include centimeters (cm), meters (m), inches (in), feet (ft), and feet / inches (ft / in). The supported range is 1 through 300.
- Mother height
- Measured adult height. Supported units include centimeters (cm), meters (m), inches (in), feet (ft), and feet / inches (ft / in). The supported range is 100 through 250.
- Father height
- Measured adult height. Supported units include centimeters (cm), meters (m), inches (in), feet (ft), and feet / inches (ft / in). The supported range is 100 through 250.
- Child sex used by formula
- The conventional method applies a 13 cm adjustment. Available choices are Male and Female.
Outputs
- Height
- This is the primary result. It is displayed in cm. The visible value uses up to 1 decimal places according to the output rule.
- Total inches
- It is displayed in in. The visible value uses up to 2 decimal places according to the output rule.
- Decimal feet
- It is displayed in ft. The visible value uses up to 3 decimal places according to the output rule.
- Lower target boundary
- It is displayed in cm. The visible value uses up to 1 decimal places according to the output rule. It appears only when the selected mode supports this result.
- Upper target boundary
- It is displayed in cm. The visible value uses up to 1 decimal places according to the output rule. It appears only when the selected mode supports this result.
- Difference from 6 ft 8 in
- It is displayed in cm. The visible value uses up to 1 decimal places according to the output rule.
Direct unit conversion from the normalized height. Keep the result label, unit, selected mode, and stated limitations together when sharing the answer.
Frequently asked questions
Can parents' heights predict a child's height?
They can support a rough estimate, not a guarantee.
What age is the Khamis-Roche method for?
Use only the age range documented for the method and reference population.
Are feet-to-centimeters conversions exact?
The inch-to-centimeter factor is exact; displayed values may be rounded.
Does height percentile predict adult height?
No; it describes position on a current-age reference chart.
When should I ask a clinician?
When there are concerns about growth rate, development or health.
Primary sources
Implementation validation covers the method, units, source record, and published verification cases. Official or primary sources control where policies or standards change.
CDC Growth Charts - https://www.cdc.gov/growthcharts/
WHO Child Growth Standards - https://www.who.int/tools/child-growth-standards
Khamis-Roche paper record - https://pubmed.ncbi.nlm.nih.gov/1941365/
NIST SI guidance - https://www.nist.gov/pml/special-publication-811