The short answer
One formula sizes a chandelier for almost any room: length + width in feet = diameter in inches. A 12 × 14 ft living room wants a fixture around 26 inches (66 cm) across. Dining rooms are the exception — there the table, not the room, sets the size. For fixture height, allow roughly 2.5–3 inches per foot of ceiling, and keep 7 feet (213 cm) of clearance anywhere people walk.
Room by room
| Room | How to size | Typical result |
|---|---|---|
| Living room | L + W in feet → inches | 12×14 ft → ~26 in / 66 cm |
| Bedroom | Same rule, then size down one step | 10×12 ft → ~20 in / 50 cm |
| Entry / foyer | L + W in feet → inches | 8×10 ft → ~18 in / 46 cm |
| Two-storey foyer | Go taller, not just wider | multi-tier or lantern, 27–36 in+ |
| Dining room | Table rule, not room rule | ½–⅔ of the table's width |
How high to hang it
Diameter is half the measurement. The other half is where the bottom of the fixture lands, and that is set by the ceiling rather than the floor plan. Two numbers cover it: the fixture wants roughly 2.5–3 inches of height for every foot of ceiling, and its lowest point should clear 7 feet (213 cm) anywhere people walk underneath.
Those two numbers argue with each other in a low room, and the table below is that argument settled — ceiling height minus the 7-foot walk line is all the space a fixture actually has.
| Ceiling | Fixture height (2.5–3 in/ft) | Space above the 7-ft walk line | Verdict |
|---|---|---|---|
| 8 ft / 244 cm | 20–24 in / 50–60 cm | 12 in / 30 cm | Won't fit — semi-flush or flush |
| 9 ft / 274 cm | 22–27 in / 56–68 cm | 24 in / 60 cm | Fits at the short end |
| 10 ft / 305 cm | 25–30 in / 63–76 cm | 36 in / 91 cm | Comfortable |
| 12 ft / 366 cm | 30–36 in / 76–91 cm | 60 in / 152 cm | Room for a real drop |
| 16 ft+ (two-storey) | 40–48 in / 100–122 cm | 108 in / 274 cm | Tiered or cascading; bottom near the second-floor line |
(Measure to the bottom of the shade, not the bulb.)
Over furniture the walk line stops applying, because nobody walks under a dining table. There the fixture drops to 30–36 inches above the surface — roughly 60–66 in off the floor — and gains about 3 inches for every foot of ceiling above 8 feet. That exception is the whole reason a dining room carries a low, heavy chandelier that would be unbearable in a hallway.
Why dining rooms break the rule
A dining chandelier hangs low over furniture, so it's judged against the table, not the walls. The working numbers — half to two-thirds of the table's width, hung 30–36 inches above it — are covered properly in our dining-table chandelier guide. Use that one when there's a table involved.
Two-storey foyers: think vertical
A double-height entry is judged from the stairs, from the door, and from the landing above — a wide, flat fixture disappears in all three views. Choose something with vertical presence: tiered, lantern-shaped, or cascading. If there's a window over the door, centring the fixture in that window (seen from outside) is an old decorator's trick that still works. Keep the bottom above head height at the door — and above the stair line if it hangs near one. Our entry and foyer guide covers the rest of that room, and stairwell lighting ideas deal with the drop itself.
Bedrooms: one size down
The formula gives an honest number, but beds are low and rooms are calm; a bedroom carries a slightly smaller chandelier better than a slightly larger one. With ceilings under 8 feet, skip the drop entirely — a flush or semi-flush ceiling light does the job without the ducking. The modern white semi-flush is the plain version of that, and our low-ceilings guide has the cut-offs. Where the height exists, browse chandeliers with your two numbers — diameter and total height — already in hand. The Aurelia glass chandelier is a straightforward round form to measure against; its shades face up, so it washes the ceiling rather than glaring down. What sits around the bed — bedside sconces, lamps — is in our bedroom lighting ideas.
FAQ
How do I calculate chandelier size for a room? Add the room's length and width in feet; the sum is your diameter in inches. A 12 × 14 ft room suits a fixture about 26 inches (66 cm) across.
What size chandelier for a two-storey foyer? Prioritise height over width — tiered or lantern forms from roughly 27 inches up, hung so the bottom clears head height at the door.
Does the rule work for dining rooms? No — size to the table instead: one-half to two-thirds of the table's width, hung 30–36 inches above the surface.
How high should a chandelier hang from the floor? At least 7 feet (213 cm) to the bottom of the shade anywhere people walk under it. Over a dining table that clearance no longer applies — hang it 30–36 inches above the surface instead.
How tall should the chandelier itself be? Roughly 2.5–3 inches of fixture height per foot of ceiling — about 22–27 inches on a 9-foot ceiling. On an 8-foot ceiling that height won't fit above the 7-foot walk line, which is why those rooms take a semi-flush.