Frequently Asked Questions

Open the People tab, type a name, pick Male, Female or Child, enter the height in feet and inches or in centimeters, choose a color and click Add Person. Repeat for the second person. Both figures appear on the chart standing on the same floor line, each with a badge showing its height, and the Height Difference card below the chart tells you who is taller and by how much in both units.

There is no hard limit in the interface; the chart is designed for 2 to 20 items and scrolls horizontally when it needs more room. Share links carry up to 50 items. Every item keeps the same scale and baseline no matter how many you add, so a comparison of twelve people is just as accurate as a comparison of two.

The tabs above the form switch between eight libraries: People, Celebrities, Fiction and fantasy, Animals, Plants and trees, Sports, Objects, and your own Image. Celebrities and fictional characters come with widely reported heights. Animals include everything from a chipmunk to a blue whale, plants run from a tulip to a 20-metre oak, and objects give everyday reference points such as a door, a car or a city bus. Click any entry to add it with its typical height, then edit the height if you know a more exact figure.

Yes. After choosing Male, Female or Child, a row of body styles appears under the toggle. Click Show all styles to browse the full set (over 160 female and 60 male poses) and pick the one that suits the person, for example long hair, a dress, a suit or a hoodie. The style is only cosmetic: every style of the same height is drawn to exactly the same height on the chart.

Yes. Open the Image tab, choose a photo or cut-out (PNG with a transparent background works best), give it a name and enter its real height. The picture is scaled to that height on the same ruler as everyone else. Images stay in your browser's memory only: they are never uploaded, and they are not included in share links.

Hover over a figure on the chart (or tap it on a phone) to reveal the edit and delete buttons above its head, or use the pencil and bin icons in the People list under the form. Editing reopens the form with that person's details; change anything and click Update Person. Reset restores the three demo people and Clear All empties the chart.

The toolbar under the chart lets you sort items in the order you added them or from shortest to tallest (and back), switch the left ruler between centimeters and feet, and zoom from 60% to 200%. Zoom only changes how large the chart is drawn on screen; the proportions between items never change. The opposite unit is always shown on the right-hand ruler, so you can read both scales at once.

It is a measurement, not an illustration. Every height is stored in centimeters and multiplied by one shared scale, so the ratio between any two figures on screen equals the ratio between their real heights. A 180 cm person is always drawn exactly 1.2 times as tall as a 150 cm person. Values are rounded only when they are displayed, never in the calculation.

Yes. Select the ft / in unit and enter feet (1 to 8) and inches (0 to 11). The value is converted to centimeters using the exact definitions 1 ft = 30.48 cm and 1 in = 2.54 cm, which have been fixed internationally since 1959. If you switch back to feet later, the tool converts from the stored centimeter value, so nothing drifts.

Yes. Switch the unit to cm and enter any height from 30 to 250 cm for a person, or from 1 to 2,000 cm for animals, plants and objects. Decimals such as 177.8 are kept as entered. Feet and inches are shown rounded to the nearest inch, and centimeters to one decimal place.

The tool finds the tallest item, rounds up to a tidy ruler maximum (for example 200 cm for a group of adults, or 600 cm if a giraffe is present), and computes scale = chart height ÷ ruler maximum. Each figure is then rendered at height (cm) × scale pixels, standing on the same baseline. The grid lines and both rulers use the same scale, which is why the badges line up with the ruler marks.

Yes. Animals that stand upright are given their typical height to the top of the head or shoulder. Animals that are drawn side-on, such as whales, sharks, crocodiles and long dinosaurs, are given their typical length instead, and the tool works out the drawn height from the shape of the silhouette so that the length is true to scale next to a person. The heights are typical adult values for a fun comparison, not species records; edit them if you want a specific animal.

Three things usually explain it. Shoes add 2 to 3 cm, and most people picture themselves in shoes. Height also changes through the day: studies measuring spinal compression find people are roughly 1 to 2 cm shorter in the evening than in the morning. And heights are often rounded up in conversation, so 5 ft 11.5 in becomes 6 ft. The chart draws exactly what you enter, so use a morning, barefoot measurement against a wall for the truest comparison.

Yes. Click Share and the tool copies a link (or opens your phone's share sheet) that contains every item's name, model, height and color. Anyone who opens the link sees exactly the same comparison, and can edit it without affecting yours. Because the data lives in the link itself, nothing is stored on our servers and there is no account to create.

Yes. Click Download to save a PNG of the current comparison at two times screen resolution, with the ruler, each figure in its chosen color, the height badges and names. The image is rendered in your browser and downloaded directly; it is not uploaded anywhere. You can use it freely, for example in a blog post, a presentation or a group chat.

Photos can be several megabytes, far too large to fit in a URL, so share links skip uploaded images and include only silhouette items. If you need to share a comparison that includes a photo, use Download to export it as a PNG instead.

It is completely free and there is no account, sign-up or paywall. The site is supported by unobtrusive advertising so the tool itself can stay free for everyone.

No. Everything you type stays in your browser's memory while the page is open and disappears when you close the tab. Share links are generated on your device and contain the data themselves. The only data collected on the site comes from standard hosting logs and from advertising partners, as described in the Privacy Policy.

According to the CDC's anthropometric reference data for 2015 to 2018, the average adult man in the United States is about 5 ft 9 in (175 cm) and the average adult woman about 5 ft 3.5 in (161 cm). Averages vary a lot by country: the NCD Risk Factor Collaboration's 2016 study found Dutch men are the tallest on average at around 182.5 cm (6 ft 0 in). Try adding an average figure to the chart to see where a height sits.

Most people notice a difference of about 5 cm (2 in) when two people stand side by side, and 10 cm (4 in) is obvious: it is roughly the height of a forehead. On the chart even a 2 to 3 cm gap is visible because the badges float at exactly head height, which is why the tool is handy for settling close calls.