Tools & Calculators

15+ free tools for process, I&C and functional safety engineers. No account, no paywall, share results in one click.

Cable Sizing Calculator — IEC 60364

Find the minimum cable cross-section (mm²) given current, length, max allowed voltage drop, system type and conductor material.

IEC 60364-5-52

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Fuse / Breaker Sizing — IEC 60364

Recommended fuse or circuit breaker rating (A) given the load current and cable section, with cable capacity check (Iz) per IEC 60364-5-52.

IEC 60364-4-43IEC 60364-5-52

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Ohm's Law Calculator

Given any 2 of the 4 quantities (Voltage U, Current I, Resistance R, Power P), compute the other 2 instantly.

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Power Calculator (DC / AC mono / AC tri)

Compute active power P (W), reactive power Q (var), apparent power S (VA) for DC, single-phase AC and three-phase AC systems.

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Voltage Drop Calculator — IEC 60364

Calculate voltage drop in a cable (DC, single-phase AC, three-phase AC) per IEC 60364-5-52. Cu / Al conductor, returns ΔU in V and %, and compliance verdict.

IEC 60364-5-52

Try it → Instrumentation

4-20 mA Loop Scaling Calculator

Convert between a 4-20 mA current signal and an engineering unit value (pressure, temperature, level, etc.). Bidirectional — leave either side empty to compute it.

NAMUR NE 43

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NAMUR Frequency Status (NE 43 Liquiphant)

Classify a tuning-fork (Liquiphant) frequency output as free, covered, or sensor failure per NAMUR NE 43.

NAMUR NE 43

Try it → Process

Flow Rate Converter (m³/h ↔ L/min ↔ US gpm ↔ CFM)

Convert volumetric flow rate between m³/h, L/min, L/s, US gallons per minute, CFM and more — for water, gas, or any incompressible flow.

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Pressure Unit Converter (bar ↔ psi ↔ kPa ↔ mmHg ↔ atm)

Convert pressure values between bar, psi, kPa, MPa, mmHg, atm, mbar, inHg, inH2O — all common engineering units in one calculation.

Try it → Process

Temperature Converter (°C ↔ °F ↔ K ↔ °R)

Convert temperature between Celsius, Fahrenheit, Kelvin and Rankine — all in one calculation.

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Valve Sizing — Kv / Cv (liquids)

Compute the flow coefficient Kv (m³/h at 1 bar Δp) and Cv (US gpm at 1 psi Δp) for a control valve, given flow rate, pressure drop and specific gravity. Per IEC 60534 / ISA 75.

IEC 60534-2-1ISA 75.01

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FIT ↔ MTBF Calculator

Convert between Failure In Time (FIT, failures per 10⁹ hours) and Mean Time Between Failures (MTBF) in hours and years.

IEC 61508

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PFD ↔ SIL Band Calculator (IEC 61508 / 61511)

Determine the achieved Safety Integrity Level (SIL 1-4) from a PFDavg value, per IEC 61508-1 Table 2 (Low Demand Mode). Also returns Risk Reduction Factor RRF.

IEC 61508-1IEC 61511

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RRF ↔ SIL Band Calculator

Determine the Safety Integrity Level (SIL 1-4) from a Risk Reduction Factor (RRF), per IEC 61508-1 / IEC 61511 (Low Demand Mode).

IEC 61508-1IEC 61511

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