What problem this solves
The internet’s pendant height rule of thumb — 75 cm above the dining table — is correct for one specific scenario: a 40 cm dome pendant over a rectangular table in a room with 2.7 m ceilings. Change any of those inputs and the right drop shifts. A 60 cm drum over the same table should sit a few cm higher to clear the seated viewer’s eye line across the table; a 30 cm cone over a kitchen island should sit higher than the dining rule because the cook is standing, not seated. The calculator applies the rule that matches your location.
The sightline check is what most calculators skip. When you sit at a dining table, the eye line of the person opposite you is about 20 cm above the table. The pendant bottom must clear that line across the entire table, otherwise the seated viewer sees the bottom of the shade rather than the side. For a 180 cm table, this usually pushes the drop higher than the simple 75 cm rule.
Who it’s for
- Kitchen designers sizing pendants over an island or breakfast bar
- Dining room designers matching a fixture to a table
- Entryway designers specifying statement pendants
- Bedroom designers installing bedside pendants instead of table lamps
Why location matters more than ceiling height
A high ceiling lets you drop a pendant more, but the right drop is determined by the activity below. Over a dining table, the bottom must clear the seated viewer’s eye line across the table. Over an island, the cook is standing and needs to see across the workspace. In an entry, the viewer is walking and the bottom should sit at head height for impact. In a bedroom, the bottom should sit above seated head height when the user is reading in bed. The same pendant in the same ceiling will have different drops in each room.
Limitations
- Adjustable-length pendants (with cable stop) require the drop to be set on site; calculator gives a target.
- Linear pendants over rectangular tables are spaced along the long axis — spacing math not modelled.
- Vaulted ceilings require angled mounts; the calculator assumes a flat ceiling.
- Cluster pendants (3 or more over one feature) use a different “cluster height” rule — each pendant lower than the centre one.
- Sloped ceilings need a swivel canopy; drop length measured along the slope, not vertically.
Practical rules of thumb
Dining: bottom 65–75 cm above the table (35–45 cm for very low ceilings or tight spaces). Island: 80–90 cm above the counter (some chefs prefer 95–100 cm). Entry: bottom 200–215 cm from the floor (sit higher in two-storey foyers). Bedside: bottom 60–70 cm above the mattress. For pendant diameter, aim for 1/3 of the table width for a single pendant, or 1/2 for two pendants.