4'0" in CM, Meters & Percentile
The exact conversion for 4'0", plus where it ranks among US adults aged 20 and over.
| Feet & inches | 4'0" |
| Total inches | 48 in |
| Centimeters | 121.9 cm |
| Meters | 1.22 m |
| Decimal inches | 48.0 in |
| Male adult percentile | below the 5th percentile |
| Female adult percentile | below the 5th percentile |
How it's calculated
4'0" is 48 inches. Multiplying by the fixed 2.54 cm/in constant gives 121.9 cm exactly; dividing by 100 gives 1.219 m. Nothing here is rounded until it's displayed -- the underlying figure carries full precision through every step.
Where 4'0" ranks
Against CDC/NCHS, Anthropometric Reference Data for Children and Adults: United States, 2015–2018 (Vital and Health Statistics, Series 3, No. 46, January 2021), 4'0" (121.9 cm) sits at below the 5th percentile for adult men and below the 5th percentile for adult women aged 20 and over. See the full Height Comparison Chart for every height from 4'0" to 7'0" side by side, or the Height Percentile Calculator for a height between whole inches.
A physical reference
4'0" is about 22 inches shorter than a full-size refrigerator. Want to see 4'0" next to a person or another object, drawn to scale? Use the Height Comparison tool.
Frequently Asked Questions
How tall is 4'0" in cm?
4'0" is exactly 121.9 cm -- 48 inches multiplied by the fixed 2.54 cm/in conversion constant, not a rounded estimate.
Is 4'0" tall or short for an adult?
Among US adults aged 20 and over, 4'0" falls at below the 5th percentile for men and below the 5th percentile for women (CDC/NCHS, Anthropometric Reference Data for Children and Adults: United States, 2015–2018 (Vital and Health Statistics, Series 3, No. 46, January 2021)) -- the same height reads very differently against each distribution because men's and women's average adult heights differ.
What is 4'0" close to?
4'0" is about 22 inches shorter than a full-size refrigerator.
Where does this conversion and percentile data come from?
The conversion uses the fixed 1959 international definition of 1 inch = 2.54 cm. The percentiles come from CDC/NCHS, Anthropometric Reference Data for Children and Adults: United States, 2015–2018 (Vital and Health Statistics, Series 3, No. 46, January 2021), the same source and interpolation this site's Height Percentile Calculator and Height Comparison Chart use -- see those pages for the full tabulated data.
Nearby heights
These are reference figures, not a real-world measurement of you or anyone else. This site isn't affiliated with the CDC, the NBA, FIBA, or any manufacturer whose products are referenced as scale objects -- see the Terms.