Outlet Spacing Calculator
Calculate required electrical outlet spacing and count for any room based on NEC code requirements. Includes GFCI, AFCI, and room-specific regulations.
How to Use This Calculator
Plan electrical outlets to meet NEC code requirements:
- Enter room length and width in feet
- Select the room type for specific requirements
- Indicate number of doorways (3 feet each)
- Enter number of windows (3 feet average each)
- Review minimum and recommended outlet counts
Why This Matters
Proper outlet spacing is required by the National Electrical Code for safety. The 6-foot rule ensures appliances can reach an outlet without extension cords, reducing fire hazards. Different rooms have specific GFCI and AFCI requirements.
- Calculate NEC-compliant minimum outlet count
- Get room-specific requirements (GFCI, AFCI)
- Plan for countertop outlets in kitchens
- Avoid code violations during inspection
Worked Examples
12×14 Living Room
2 doorways, 3 windows, standard room
Calculation: 52 ft perimeter - 15 ft (doors/windows) = 37 ft usable
Result: 4 outlets minimum, 6 recommended (AFCI required)
10×12 Kitchen
8 feet of countertop, 1 doorway
Calculation: Countertop: 8 ÷ 4 = 2 outlets (24 inch rule)
Result: 2 countertop (GFCI), plus wall outlets, 2 dedicated circuits
Common Mistakes to Avoid
- Forgetting walls 2 feet or wider need outlet access
- Not accounting for furniture blocking outlets
- Placing outlets too close to corners
- Missing GFCI in wet areas (within 6 feet of water)
- Forgetting outdoor and garage outlet requirements