Lesson 3.2
The International Baseline
The handful of body dimensions every designer carries in their head. A global starting point — drawn from Neufert and Panero — that you adjust for region and individual.
Start hereAsk any experienced architect the height of a kitchen counter and they'll say '900' without thinking. Ask the width of a stair and they'll say '1000 minimum.' These aren't looked up — they're known.
This lesson is the list worth memorising: the baseline body, head to toe.
01 — The standing body
The figure every designer knows
Start with a standing adult around the 50th percentile. These few numbers — eye height, shoulder width, reach — generate a huge share of architectural dimensions. Tap each point to see the value and what it sets.
Standing height
~1700 mm · ~5'-7"
Tap each point on the body. These few 50th-percentile figures generate a huge share of architectural dimensions.
02 — The numbers to memorise
The baseline list
Here's the core set. Learn these as approximate round numbers — they're the 50th-percentile starting points you adjust from. (Metric and imperial, because you now speak both.)
| Body dimension | Metric | Imperial | Sets… |
|---|---|---|---|
| Standing height | ~1700 mm | ~5'-7" | Door height clearance |
| Eye level (standing) | ~1600 mm | ~5'-3" | Mirror, art, signage height |
| Shoulder width | ~450 mm | ~1'-6" | Personal space, passing width |
| Elbow height | ~1050 mm | ~3'-5" | Counter, handrail height |
| Comfortable reach up | ~2000 mm | ~6'-7" | Top shelf, high storage |
| Seated eye level | ~1200 mm | ~3'-11" | TV, desk-facing views |
03 — Building dimensions from the body
One body, a whole room
Watch how the baseline cascades. A kitchen: counter at elbow height (~900 mm), upper cabinets starting where a hand reaches comfortably, the gap between sized so you can turn with a pot. A bathroom: basin at elbow height, mirror at eye level, towel rail within reach. Every fixture's height and spacing traces to a body dimension you now know.
This is the designer's superpower: given any space, you can generate sensible dimensions from first principles, then refine. You're no longer guessing — you're deriving.
You'll notice these are deliberately rounded — '~1700 mm' not '1698.4 mm'. That's correct practice, not laziness. Because real bodies span a range, false precision is meaningless: there's no single true height. Designers carry round figures for instinct, then check the specific percentile and any code requirement when a dimension is critical (a door, a stair, an accessible fixture). The baseline is for fluency — the feeling that '1100 counter' is too tall before you've measured anything. Precision comes from the code tables in 3.4, not from memorised decimals.
12 minutes
- From the baseline list, write the height you'd set for: a bathroom mirror, a kitchen counter, a light switch, a coat hook. Justify each from a body dimension.
- Measure your own height, eye level and elbow height. How far are you from the 50th-percentile baseline?
- Sketch a kitchen counter elevation by hand, dimensioning counter height and upper-cabinet start from body logic.
Key terms — added to the Drawing Atlas
- Neufert (Architects' Data)
- Ernst Neufert's reference work (1936, continuously updated), the European-rooted international standard for building dimensions.
- Human Dimension & Interior Space
- Panero and Zelnik's classic anthropometric reference focused on the body and interior fit.
- Eye level
- The height of the eyes above the floor (~1600 mm standing, ~1200 mm seated). Sets mirror, art and signage heights.
- Reach height
- The comfortable upward reach of an arm (~2000 mm). Sets top-shelf and high-storage limits.
- Elbow height
- The height of the elbow when standing (~1050 mm). Sets working-counter and handrail heights.
- Baseline body
- The set of 50th-percentile body dimensions a designer memorises as a starting point, then adjusts.
Check yourself
2 quick questions — pick an answer to see why.
Q1Approximate standing eye level for a 50th-percentile adult is about:
Q2Why are baseline body dimensions given as round numbers (e.g. ~1700 mm)?
- A handful of 50th-percentile body dimensions generate most architectural heights and clearances.
- Learn them as round numbers for instinct, in both metric and imperial.
- Round is right — real bodies are a range; precision comes from code tables, not memorised decimals.
- From the baseline you can derive sensible dimensions for any space, then refine.
This baseline is a global average. But a body in Tokyo, Lagos and Amsterdam is not the same body — so how much does it actually vary, and when does that matter?