Device Count Calculator
Estimate receptacles, switches, lights, and dedicated circuits per room based on NEC minimums and common practice.
| Room | Qty | Recepts | Switches | GFCI | Lights | Dedicated |
|---|---|---|---|---|---|---|
| Bedroom | 3 | 12 | 3 | 0 | 6 | 0 |
| Bathroom | 2 | 0 | 2 | 2 | 4 | 2 |
| Kitchen | 1 | 2 | 2 | 2 | 3 | 2 |
| Living Room | 1 | 6 | 2 | 0 | 3 | 0 |
| Garage | 1 | 0 | 1 | 3 | 2 | 1 |
| Totals | 20 | 10 | 7 | 18 | 5 | |
| Total Devices | 55 | |||||
How device counts are estimated
This calculator uses NEC minimum requirements combined with common residential practice to estimate device counts per room type. The actual number of devices for any project depends on the floor plan, customer preferences, and local code amendments.
Room-by-room breakdown
Kitchens require at least two 20A small-appliance branch circuits with GFCI protection, plus dedicated circuits for the dishwasher, disposal, and other fixed appliances. Bathrooms need at least one GFCI receptacle and a dedicated 20A circuit. Bedrooms typically get 4 receptacles per NEC spacing rules (no point along the wall more than 6 feet from an outlet).
Dedicated circuits
Dedicated circuits are required for high-draw appliances: washers, dryers, ranges, HVAC equipment, and garage door openers. This calculator includes common dedicated circuits per room type to give a realistic total.
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