All calculators

Signal & Loop

4-20 mA to Process Variable (PV) Calculator

Convert loop current to process value, percentage and back — with any range.

mA to Percentage Converter

Instant 4-20 mA ↔ 0-100 % conversion.

Current Loop Voltage Drop Calculator

Will your transmitter power up? Check supply voltage vs loop resistance.

5-Point Calibration Table Generator

Generate 0-25-50-75-100 % test points in mA and engineering units.

Square Root Extraction Calculator (DP ↔ Flow)

Convert DP signal to flow percentage and mA — the √ law done right.

Temperature

PT100 / PT1000 Resistance ↔ Temperature Calculator

Callendar–Van Dusen conversion both ways, Class A/B tolerance included.

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

Celsius, Fahrenheit, Kelvin and Rankine in one live grid.

Thermocouple mV ↔ Temperature Calculator

Types K, J, T, E, N, R, S, B with cold junction compensation.

Pressure

Pressure Unit Converter

bar, psi, kPa, kg/cm², mmH2O, inH2O, mmHg, Torr, atm — all at once.

Hydrostatic Pressure / Liquid Head Calculator

Pressure from liquid height and density (and back).

Gauge ↔ Absolute Pressure Converter

psig to psia, barg to bara — with altitude-corrected atmospheric pressure.

Flow

Flow Unit Converter

m³/h, L/min, GPM, BBL/d, kg/h, Nm³/h, SCFM in one place.

Pipe Velocity Calculator

Velocity from flow rate and pipe ID — with recommended velocity limits.

Mass ↔ Volumetric Flow Converter

kg/h ↔ m³/h with density — edit any of the three.

Level & Tank

DP Transmitter Level Calculation — Open TankSOON

Range, LRV/URV and mA output for open-tank DP level.

Control Valves

Control Valve Cv Sizing — LiquidSOON

Required Cv from flow, ΔP and specific gravity.

Electrical

Cable Voltage Drop Calculator

Voltage drop and % drop for copper/aluminium, 1-φ and 3-φ.

Ohm's Law Calculator (V, I, R, P)

Enter any two of voltage, current, resistance, power — get the rest.

Three-Phase Power Calculator (kW ↔ kVA ↔ Amps)

kW, kVA, kVAR and line current from voltage and power factor.

Process & General

PID Tuning Calculator (Ziegler–Nichols & Cohen–Coon)SOON

P, PI, PID settings from process test data.

Calibration

Instrument Error Converter — % Span ↔ % ReadingSOON

Convert accuracy specs between % of span, % of reading and absolute units.

Analyzers

Gas Concentration Converter (ppm ↔ mg/m³ ↔ %LEL)SOON

Convert gas concentration units with molecular weight.