Mini Split Sizing Calculator
Calculate the right size ductless system for your space
Room Configuration
Add each room or zone you want to cool/heat with the mini split system.
Room 1
Sq Ft:
300
|
BTU:
6,000
Climate & Insulation
Recommended System
Total BTU
6,000
Total Sq Ft
300
Zones Needed
1
System Size
9K
System Options:
BTU Quick Reference
General rule: 20 BTU per sq ft
| Room Size | BTU |
|---|---|
| 150-250 sq ft | 6,000 |
| 250-400 sq ft | 9,000 |
| 400-550 sq ft | 12,000 |
| 550-700 sq ft | 15,000 |
| 700-1,000 sq ft | 18,000 |
| 1,000-1,200 sq ft | 24,000 |
| 1,200-1,500 sq ft | 30,000 |
| 1,500-2,000 sq ft | 36,000 |
Standard Mini Split Sizes
9,000 BTU (9K)
0.75 Ton
12,000 BTU (12K)
1 Ton
18,000 BTU (18K)
1.5 Ton
24,000 BTU (24K)
2 Ton
36,000 BTU (36K)
3 Ton
48,000 BTU (48K)
4 Ton
Sizing Tips
- Don't oversize! An oversized unit will short cycle and not dehumidify properly.
- For heating, increase BTU by 20-30% in cold climates.
- Kitchens need 4,000 extra BTU for heat from appliances.