Ohms Law
Voltage, current, and power calculations without manual formulas.
App calculators
Fast electrical tools for the field
Sparky Toolbox keeps essential preliminary calculations close at hand for estimating, bidding, and field verification.
Motor OCPD & Wire Sizing
Preliminary motor protection and conductor sizing in the field.
Transformer OCPD & Wire Sizing
Breaker and conductor sizing for transformer load planning.
Wire Selection & Sizing
Choose wire size and matching OCPD for common applications.
Conduit Fill
Check conduit capacity limits before pulling wire.
Voltage Drop
Estimate voltage loss across longer runs.
Standard Dwelling Load
Simplify residential service calculations.
Transformer Sizing
Find the kVA rating needed for a load.
Solar Panel Calculator
Estimate PV panel count from energy targets.