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Engineer's toolkit.

Six free calculators for the day-to-day decisions every plant engineer makes — cable sizing, VFD payback, motor FLA, IP rating, downtime cost, capacitor-bank kVAR. Pure client-side, no signup, runs forever in your browser.

Decision tools

Smart Panel Sizer

Answer 7 questions. Get a recommended panel, an indicative BOM with Siemens / WAGO / BCH part numbers, an IP rating, a budget range and a one-click RFQ.

Open the sizer

Instant Budgetary Quote

Slide three controls, see a budget range and a lead time in real time. The fastest panel quote on the internet — no email gating, no callback wait.

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Calculators

Six tools every plant engineer reaches for.

Sizing

Cable Size Calculator

Estimate copper cable cross-section for a 3-phase load — IEC 60364 reference.

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Energy

VFD Energy Savings & Payback

Estimate annual ₹ saved and payback months when retrofitting a VFD on a centrifugal load.

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Sizing

Motor Full-Load Current

Compute FLA for a 3-phase or single-phase motor — sizing contactors, breakers, OLR.

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Selection

IP Rating Selector

Pick the right ingress-protection class for your panel's environment.

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Risk

Plant Downtime Cost

Calculate the per-hour ₹ cost of an unplanned panel failure — justify preventive maintenance.

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Sizing

Capacitor Bank Sizing (kVAR)

Compute the kVAR required to lift power-factor from current to target — APFC sizing.

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Why we built this

“Plant engineers spend hours reaching for the right cable size, the right contactor, the right kVAR. We do this every day. Putting our intuition online — for free — is the best way we know to introduce ourselves.”

S P Automation · 24 years