Calculators

Calculate voltage drop across a conductor run for a given load and length.

Determine minimum conductor size for a load based on ampacity and derating.

Check conduit fill percentage against code-allowed fill for a set of conductors.

Estimate locked rotor current for a motor from nameplate horsepower and voltage.

Look up full-load current for a motor by horsepower and voltage.

Check flow velocity through a pipe, or size a pipe for a target velocity.

Compute Darcy-Weisbach head and pressure loss for a pipe run.

Demand, capacity resolution, curve validation, and driver power sizing for fire pumps.

Total Dynamic Head for a pump from static lift, suction/discharge piping, and residual pressure.

Hydraulic and shaft power, plus recommended motor size, from flow and TDH.

Axisymmetric plume smoke production and volumetric flow rate per NFPA 92.

Time-varying t-squared fire growth smoke production at a single evaluation time, per NFPA 92.

Required natural smoke vent area from smoke volumetric flow rate and temperature, per NFPA 92/204.

Sound pressure level at a target distance from a reference SPL and distance (inverse-square law).

Check notification appliance audibility against NFPA 72 public/private/sleeping-area thresholds.