Height Comparison
Add up to six people or objects, choose a preset or type an exact height, and see them drawn side by side to true scale -- with the difference between any two shown in inches, centimeters and percent.
Add up to six people or objects, pick a preset or type an exact height, and see them side by side to true scale.
Average man (US)
5'9.0" · 175.3 cm
Average woman (US)
5'3.5" · 161.3 cm
Interior door
6'8.0" · 203.2 cm
Silhouettes are simple outlines scaled to true relative proportion, not a photograph or a body-shape estimate -- see the notes below for how the preset heights are sourced.
How the scaling works
Every height is converted to centimeters internally, then scaled so the tallest entry on the stage fills it completely and every other entry is drawn at exactly its proportional share:
pixel height = (entry height ÷ tallest entry height) × stage height
Because every entry shares the same ratio, two silhouettes that are, say, 10% apart in real height are always drawn exactly 10% apart on screen -- resizing the stage or adding a taller entry rescales everyone together, it never distorts one entry relative to another.
Worked example
The tool's own default comparison: the average US man (CDC mean, 175.3 cm) against the average US woman (CDC mean, 161.3 cm).
| Difference | 5.5 in (14.0 cm) |
| The taller one is taller by | 8.7% |
| Taller ÷ shorter | 1.1× |
Load the tool above with its defaults and the "Compare two entries" panel lands on this exact figure -- checked in the site's own test suite, not just written here.
Frequently Asked Questions
How accurate are the silhouettes?
Every silhouette is scaled by real height only -- pixel height is directly proportional to the centimeters you entered, and the tallest entry always fills the stage. They're simple outlines, not a body-shape or build estimate: two entries of the same height always render at the same height, regardless of the silhouette style you pick for each.
Where do the average-height presets come from?
The "average man" and "average woman" presets are the mean height for US adults aged 20 and over from CDC/NCHS, Anthropometric Reference Data for Children and Adults: United States, 2015–2018 (Vital and Health Statistics, Series 3, No. 46, January 2021) -- Table 11 (height in centimeters and Table 9 (height in centimeters. See the Height Percentile Calculator for the full percentile breakdown behind these numbers, not just the mean.
Where do the reference-object heights come from?
The interior door preset uses 80 in, the common US residential door-slab height; the basketball hoop preset uses the official NBA and FIBA rim height of 10 ft; the refrigerator preset is a typical full-size model, labeled "about" because it varies by manufacturer and model, not a fixed standard like the door or hoop.
Can I share a comparison I've built?
Yes -- every entry's label, height, color and silhouette style is encoded directly in the page's URL as you edit it, with no account and nothing saved on a server. Use "Copy shareable link" or just copy the address bar; opening that link rebuilds the exact same comparison.
Why does the vertical ruler only show feet, not centimeters?
It's a scale reference for the stage as a whole, not a per-entry readout -- each entry already shows its own exact height in both ft/in and cm underneath its silhouette. Feet keep the ruler's tick marks legible at any stage size; switch an entry's own field to cm for the exact metric figure.
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.