A 10 cm height difference is about 3.94 inches; 15 cm is 5.91 inches; 20 cm is 7.87 inches. The interactive chart starts with 165 cm and 180 cm, a 15 cm gap. Change either height to see a different comparison.
A silhouette chart puts both people on a shared baseline, so the entered heights are easier to compare than unrelated photographs. The silhouettes illustrate scale. They do not predict exactly where someone’s eyes, shoulders or chin will sit relative to another person.
10, 15 and 20 cm gaps at a glance
| Height difference | Inches, rounded | Example heights |
|---|---|---|
| 10 cm | 3.94 in | 165 cm and 175 cm |
| 15 cm | 5.91 in | 165 cm and 180 cm |
| 20 cm | 7.87 in | 165 cm and 185 cm |
What a 10 cm height difference shows
Enter 165 cm and 175 cm for a 10 cm gap. It is slightly less than four inches. Keeping one person’s height fixed while changing the other makes it easier to compare the three examples without changing the reference point.
What a 15 cm height difference shows
The starting chart uses 165 cm and 180 cm. Subtract 165 from 180 to get 15 cm. Divide 15 by 2.54 to get approximately 5.91 inches. The numeric gap remains the same if the people swap places.
What a 20 cm height difference shows
Change the second height to 185 cm while keeping the first at 165 cm. The difference becomes 20 cm, or just under eight inches. Use the same footwear convention for both inputs if you want a meaningful comparison of standing heights.
Try your own heights and save the chart
- Enter the two measured heights and choose a unit for each person.
- Select Calculate difference to update the number and silhouettes.
- Choose Download PNG to create a chart card.
- Use Copy comparison link if you want someone else to open the entered comparison.
For personalised photographs instead of silhouettes, open our couple height comparison tool. Use known heights, full-length pictures and careful head-to-foot crops. The entered measurement sets the scale; uploading a photograph does not measure a person. Share only pictures you have permission to use.
Why the same gap can look different in photos
Posture, footwear and distance from the camera can change appearances. Different body proportions also mean a 15 cm gap cannot reliably be translated into a rule such as “one person reaches the other’s chin.” Start with measured values rather than estimating from facial landmarks.
Height difference alone does not indicate relationship compatibility. This tool helps visualise measurements and create cards; it does not score couples or recommend a partner’s height.
Frequently asked questions
Is 15 cm the same as six inches?
Not exactly. Six inches is 15.24 cm; 15 cm is approximately 5.91 inches.
Does a 20 cm gap always look the same?
The absolute gap is the same, but its size relative to either person changes with their heights. Body proportions and photography also affect appearance.
Do the names and heights appear in a shared link?
The copied comparison link contains the entered comparison. Use labels you are comfortable sharing; downloading a card is a separate action.
Conversion reference: NIST units of length. Need help with input notation? Read decimal feet vs feet and inches, or open the height difference guide.