Box Fill Calculator Comparisons

Compare our free box fill calculator with other tools to make an informed choice for your NEC 314.16 calculations.

Calculator Comparisons

Feature Comparison

FeatureBoxFillCalculator.comOther Calculators
Free to useVaries
No registration requiredUsually required
NEC 2023 compliantSome outdated
Terminal block supportRare
Works on mobileVaries
Multiple box typesLimited
Instant resultsMost
Detailed breakdownsSome

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Always Free

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NEC 2023 Ready

Updated for the latest code including terminal block requirements per 314.16(B)(6).

No Account Needed

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Mobile Friendly

Works perfectly on phones and tablets for on-site calculations.

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