Room Pyeong Calculator

Accurately calculating room pyeong is the first step in real estate transactions and interior planning. One pyeong equals exactly 3.3058 square meters, approximately 182cm × 182cm. Measure room width and length in meters, multiply them for square meters, then divide by 3.3058 for pyeong. For example, a 4m × 3m room is 12 square meters, about 3.6 pyeong. Medium pyeong (jungpyeong) rounds actual pyeong to 10-pyeong units, commonly used in real estate ads. A 25-pyeong apartment is listed as 25-pyeong or medium-small, while 33-pyeong is classified as medium-large. When calculating room pyeong, measure pure interior area excluding wall thickness for accuracy.

Apartment pyeong is based on exclusive area, representing actual living space. 20-pyeong apartments (exclusive area 59-74㎡) suit 2-3 person households, with 2-3 rooms plus living room and kitchen. Typical 25-pyeong has exclusive area of about 84㎡ with 3 rooms, living room, kitchen, and 2 bathrooms. 30-pyeong (exclusive area 99-114㎡) is most popular for 4-person families, offering 4 rooms with spacious living room and kitchen. 33-pyeong has exclusive area of about 110㎡, providing comfortable living space. 40-pyeong (exclusive area 132-148㎡) is classified as large, with 4-5 rooms plus possible dress room and study. Supply area is about 30% larger than exclusive area, including common spaces like stairs and corridors.

Understanding exclusive and supply area is crucial in real estate contracts. Exclusive area is actual living space including rooms, living room, kitchen, and bathroom. Supply area adds common spaces like stairs, corridors, and elevators to exclusive area. Supply area is typically 1.3 times exclusive area. For example, an 84㎡ (about 25-pyeong) exclusive area apartment has supply area of about 110㎡ (about 33-pyeong). Sales ads often prominently display supply area, causing confusion. Land registry shows exclusive area, so verify before signing. Service area (expanded balcony) is not included in exclusive area but is usable, making perceived space larger when balcony is expanded.

Proper furniture arrangement varies by room pyeong. Under 3-pyeong small rooms can fit single bed, small wardrobe, and desk. Use storage beds or wall shelves for space efficiency. 4-5 pyeong medium rooms accommodate double bed, wardrobe, and vanity, suitable for master bedroom. 6+ pyeong large rooms comfortably fit king bed, dress room, and vanity. Living rooms need 15+ pyeong to arrange sofa, TV stand, and dining table with spare space. Kitchen needs 3-4 pyeong ideally; 4+ pyeong allows island table addition. Calculating room pyeong and planning furniture size prevents cramped space or furniture fit issues after moving.

Officetels and apartments feel different even at same pyeong. Officetels have different pillar/wall structure and lower ceilings (usually 2.3m), feeling smaller than same-pyeong apartments. Apartments have 2.5-2.8m ceilings and balcony expansion options, feeling more spacious. 20-pyeong officetel provides perceived space of about 15-pyeong apartment. Officetels also have higher common area ratio, with 60-70% exclusivity rate. Apartments have 80-85% exclusivity. For example, 30-pyeong supply area officetel has 18-21 pyeong actual exclusive area, while 30-pyeong apartment has 24-25 pyeong. When choosing officetels for investment or residence, carefully verify actual exclusive area and preferably visit site to confirm perceived space.

Room pyeong is crucial for determining rent. Generally, per-pyeong monthly rent helps grasp market rates. Seoul Gangnam area apartments average 50,000-80,000 won per pyeong monthly, so 30-pyeong is 1.5-2.4 million won monthly. Gangbuk area is 30,000-50,000 won per pyeong, 30-pyeong being 900,000-1.5 million won. Officetels have higher per-pyeong monthly rent than apartments at 60,000-100,000 won. Newer buildings and subway proximity increase per-pyeong price. Room count matters; same 30-pyeong with 3 rooms costs 10-20% more monthly than 2 rooms. For jeonse, per-pyeong deposit averages 50-70 million won in Gangnam, 30-40 million won in Gangbuk. Accurately determining room pyeong and calculating per-pyeong price enables judging fair rent and negotiating. Comparing nearby similar pyeong rates on real estate apps is also useful.