Outlet Spacing Calculator

Calculate the number of receptacles needed along a wall to meet code spacing requirements.

Outlets Needed
— receptacles
Minimum to meet code.

Usage Tip

Any wall section 2 feet or wider generally needs its own receptacle; count short walls separately.

THE MATH
outlets = round up( wall length ÷ spacing ) + 1
Electrical code limits how far apart receptacles can be so no point along a wall is too far from an outlet. The count is the wall length divided by the spacing, plus one to start the run.
Enter the wall length and pick the spacing rule for the space.
Residential walls allow up to 12 feet; kitchen counters need one every 4 feet.
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.