Sizing an air conditioner in Dubai? Because Dubai has a hot and humid Gulf coastal climate, rooms need a different AC size than in a temperate region. The calculator below is pre-set to Dubai’s climate — enter your room’s area for an instant tonnage. Dubai’s summers are brutal — 40–48°C from May to September with high coastal humidity, so air conditioners run hard for eight to nine months a year. The humidity adds a large latent (moisture) load on top of the raw heat, which is why rooms in Dubai need more cooling capacity than the same room in a mild climate. Power comes from DEWA.
🧊 Find the Right AC Size for Your Room — in Tons & BTU
Convert room size (sq ft or m²) to the exact AC tonnage you need — 0.5, 1, 1.5, 2 Ton and up. ACCA Manual-J inspired, in tons, BTU/hr and kW, for the US, UK, Europe, India, UAE, Saudi Arabia & Australia.
🌍 Prefer metric? Switch units here
🏠1. Space Type
📐2. Floor Area & Ceiling
Range: 50 – 10,000 sq ft
Range: 7 – 20 ft
Range: 0 – 50 people
🌍3. Country / Climate
The base factor assumes a 30 °C / 86 °F design day. Change the chip above to match your region.
🧱4. Insulation
☀️5. Sun Exposure
🪟6. Windows / Glazing
➕Advanced loads (kitchen, appliances, exhaust) — optional
Wattage × 3.4 = BTU/hr. e.g. 500 W ≈ 1,700 BTU/hr
For office IT, gym gear, lab equipment
AC Tonnage Chart for Dubai by Room Size
These are typical AC sizes for Dubai’s climate, for a room with an 8-foot ceiling and average insulation. Larger, top-floor, or west-facing rooms may need the next size up:
| Room Size | Recommended AC | Approx. BTU/hr |
|---|---|---|
| 150 sq ft | 0.5 Ton | 3,920 BTU/hr |
| 250 sq ft | 0.75 Ton | 6,534 BTU/hr |
| 400 sq ft | 1 Ton | 10,454 BTU/hr |
| 600 sq ft | 1.5 Ton | 15,682 BTU/hr |
| 800 sq ft | 2 Ton | 20,909 BTU/hr |
| 1,000 sq ft | 2.5 Ton | 26,136 BTU/hr |
Sizing AC for Dubai’s Climate
Because of the extreme heat plus Gulf humidity, size AC generously and favour high-ambient ‘tropical’ inverter units rated to keep cooling above 50°C. The calculator applies Dubai’s climate factor automatically; you can still fine-tune ceiling height, insulation, sun exposure, and room type above to match your exact space. Remember that an oversized AC cools quickly but short-cycles and dehumidifies poorly — matching the tonnage to the room gives better comfort and lower running costs.
Frequently Asked Questions — Dubai
What size AC do I need for a bedroom in Dubai? A typical 150 sq ft bedroom in Dubai needs about a 0.5 Ton AC (3,920 BTU/hr). Larger rooms scale up per the chart above.
Why does Dubai need a bigger AC than a mild climate? Dubai’s hot and humid Gulf coastal climate raises the cooling load, so the same room needs more capacity than it would in a temperate region — the calculator applies that adjustment automatically.
How many BTU for a 150 sq ft room in Dubai? Around 3,920 BTU/hr under standard conditions. Adjust ceiling height and sun exposure in the calculator for a precise figure.
Related: refrigeration cycle diagram and components explained.
Estimates vary by contractor. Compare free quotes from licensed local pros before you commit. Request a quote →
High-efficiency systems may qualify for utility rebates and federal or state incentives. Find current programs at ENERGY STAR & DSIRE.
Figures are reviewed by the Refcon HVAC engineering team using U.S. DOE, ENERGY STAR & ACCA Manual J data. Estimates only — confirm with a licensed pro.