Engineering Category Hub

Industrial, 3-Phase & Motor Calculators (14 Tools)

Three-phase power calculations, motor Full Load Amperes (FLA), Locked Rotor Amps (LRA), kVA to kW conversion, and power factor correction.

Primary Governing Equation
P(3Φ) = √3 × V × I × PF | FLA = (HP × 746) / (√3 × V × η × PF)

Available Calculators (14 Tools)

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Industrial & Motor

Horsepower to Amps Calculator (HP to Amps)

Electric motor installation, pump sizing, industrial maintenance.

1-Phase: I = (HP × 746) / (V × η × PF) Open →
Industrial & Motor

Amps to Horsepower Calculator (Amps to HP)

Determining unknown motor rating from nameplate voltage and clamp meter amperage.

1-Phase: HP = (I × V × η × PF) / 746 Open →
Industrial & Motor

HP to kW Calculator

Converting US equipment specs for European metric industrial machinery.

kW = HP × 0.74569987 (Mechanical) Open →
Industrial & Motor

kW to HP Calculator

Importing machinery, electric vehicle motor power comparisons.

HP = kW / 0.74569987 = kW × 1.34102 Open →
Industrial & Motor

kVA to kW Calculator

Generator load sizing, UPS capacity calculation.

kW = kVA × PF Open →
Industrial & Motor

kW to kVA Calculator

Sizing commercial backup generators and utility transformers.

kVA = kW / PF Open →
Industrial & Motor

kVA to Amps Calculator (Single & 3-Phase)

Substation transformer secondary breaker sizing, generator feeder cable selection.

1-Phase: I = (kVA × 1000) / V Open →
Industrial & Motor

Amps to kVA Calculator

Utility load factor auditing, checking transformer loading percentage.

1-Phase: kVA = (I × V) / 1000 Open →
Industrial & Motor

Three-Phase Power Triangle Calculator (kW, kVA, kVAR)

Commercial plant power quality analysis, avoiding utility reactive power penalties.

P = √3 × V × I × cosθ Open →
Industrial & Motor

Power Factor Correction Capacitor Sizing Calculator

Industrial energy management, eliminating utility low-PF surcharge fees.

kVAR_required = kW × [tan(arccos(PF_initial)) - tan(arccos(PF_target))] Open →
Industrial & Motor

Motor Locked Rotor Amps (LRA) to Running Amps (FLA) Calculator

HVAC technician generator sizing, determining if a generator can start an AC compressor.

FLA = LRA / NEMA_Ratio (Typically LRA ≈ 5.5 to 7.0 × FLA per NEMA Code Letter) Open →
Industrial & Motor

Motor Synchronous Speed & Slip Calculator

VFD drive setup, motor troubleshooting, checking mechanical motor overload.

Ns = (120 × f) / Poles Open →
Industrial & Motor

Motor Efficiency Calculator

Energy auditing, comparing standard vs premium efficiency motors for ROI.

η (%) = [(HP × 746) / Input Electrical Watts] × 100 Open →
Industrial & Motor

Transformer Sizing & Full Load Current Calculator

Commercial electrical engineering, dry-type step-down transformer installation.

Primary I = (kVA × 1000) / (V_pri × √3) Open →