Fan sizing
1200mm vs 1400mm Ceiling Fan: Which Size Do You Need?
Compare 1200mm and 1400mm fan sizes using room dimensions and the calculator's coverage assumptions, then check air delivery and installation needs for the models you shortlist.
1200mm vs 1400mm ceiling fan: which size suits your room?
For a typical 10-foot-high room without AC, this calculator estimates about 117 sq ft per 1200mm fan and 162 sq ft per 1400mm fan. That makes 1200mm a reasonable starting point for a compact bedroom; consider 1400mm when you want one fan to serve a larger or longer space. These are planning estimates, not a guarantee of comfort or airflow.
The result also depends on room shape, ceiling height, AC use, where people sit or sleep, and the airflow of the specific model. Use the fan size calculator with your dimensions, then check the chosen model’s air delivery and its installation instructions.
Quick comparison
| 1200mm | 1400mm | |
|---|---|---|
| Nominal coverage used by this calculator at an 8 ft ceiling, without AC | 130 sq ft | 180 sq ft |
| 10×12 ft room (120 sq ft), 10 ft ceiling, without AC | Model would require 2 fans | Model would require 1 fan |
| 12×15 ft room (180 sq ft), 10 ft ceiling, without AC | Model would require 2 fans | Model would require 2 fans* |
| What to compare on a specific model | Air delivery (CMM), power, noise, warranty and service | Air delivery (CMM), power, noise, warranty and service |
*The table applies the calculator's coverage and room-shape formula to each size separately. The calculator itself returns one recommendation, not a side-by-side comparison. For the 12×15 ft example, its longest-side rule leads to two fans even at 1400mm. It does not measure airflow or assess a particular model.
Choose based on the room, not sweep alone
| Room situation | Useful starting point |
|---|---|
| Compact, fairly square bedroom | Enter the actual dimensions. Even a 10×12 ft room at a 10 ft ceiling without AC returns one 1400mm fan under this calculator's assumptions; at 8 ft it returns one 1200mm fan. |
| Larger room where one fan is preferred | Enter your dimensions. At an 8 ft ceiling without AC, the 1400mm option has a nominal 180 sq ft coverage assumption; higher ceilings reduce the estimate. |
| Long room or open living-dining area | Enter both dimensions. The tool accounts for the longest side and may suggest multiple fans rather than relying on area alone. |
| Room with AC | Select AC use in the calculator. It applies an additional circulation assumption; this does not predict a specific temperature or comfort level. |
The model’s CMM (cubic metres per minute) is its rated air delivery. A larger sweep does not tell you the exact CMM: compare the specifications for the models you are considering. See what CMM means and how to read a BEE star label.
Check the actual model and installation
Before choosing between two models, compare their rated air delivery, power input, noise information, warranty, and local service availability. Two fans with the same sweep can have different specifications, so size alone is not a performance rating.
Room dimensions also do not establish safe blade clearance or whether a ceiling mount can support a particular fan. Check the manufacturer’s installation instructions for the exact model and ask a qualified installer to assess the ceiling, mounting point, and clearances in your room. This matters especially where there is a false ceiling, sloped ceiling, beam, or nearby furniture.
Try your room dimensions
The fan size calculator estimates a fan size and count from room width, length, ceiling height, and AC use. It currently compares 900mm, 1200mm, and 1400mm fans. Treat the result as a first estimate, then compare model specifications and confirm installation requirements for your home.
For the broader size range, see the ceiling fan size guide and size chart.
Try it next
Check the fan size for your room
Enter your room dimensions, ceiling height, and AC usage to get an assumption-based size recommendation.
Open fan size calculatorCommon questions
Which is better, a 1200mm or a 1400mm ceiling fan?
The useful size depends on your room dimensions, ceiling height, AC use, and the air delivery of the specific fan. Enter the room in the size calculator as a first estimate, then compare model specifications.
What is the difference between a 1200mm and a 1400mm ceiling fan?
The nominal sweep differs by 200mm: 1200mm is commonly called 48-inch and 1400mm 56-inch. That does not establish an individual model's airflow, price, weight, or required clearance; check its specifications and installation instructions.
What room size does a 1400mm ceiling fan need?
There is no single room-area cutoff. This site's calculator assumes nominal coverage of 180 sq.ft for a 1400mm fan at an 8 ft ceiling without AC, then adjusts for room shape, height, and AC use. It does not check installation clearance.
Is a 1400mm fan suitable for a bedroom?
It can be, depending on room shape, ceiling height, and the specific fan. For a 10×12 ft room at a 10 ft ceiling without AC, this site's calculator suggests one 1400mm fan; at an 8 ft ceiling it suggests one 1200mm fan. Confirm placement and clearance with an installer.
What are 1200mm and 1400mm fans in inches?
A 1200mm fan is a 48-inch fan (exactly 47.24 inches, rounded by brands to 48). A 1400mm fan is a 56-inch fan (exactly 55.12 inches, rounded to 56). The mm figure and the inch figure describe the same sweep — the tip-to-tip diameter of the blade circle.