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Free engineering tools built by the Instranova instrumentation team. Each one solves a question we answer daily at the selection desk, using the same equations and product data we use for real quotes. No sign-up, no download; results appear as you type.
Available tools
Enter your medium, pipe size, range, and process conditions; get a ranked shortlist of matching instruments across flow, level, pressure, temperature, density, and torque, with fit badges for every parameter.
Compute pipe Reynolds number from flow rate or velocity with fluid presets, get the flow regime, or solve the minimum flow that clears the Re floor your flow meter needs.
Linear to Square Root Calculator
Convert linear 4-20 mA DP signals to square root extraction values and back, with a low-flow cutoff and a check that catches double extraction in DP flow loops.Flow Rate from Pressure Calculator
Convert a differential pressure reading to flow: orifice equation with velocity-of-approach factor, square-root rescaling, and valve Cv modes, in SI and US units.4-20 mA Signal Calculator
Convert a 4-20 mA signal to the process value and back for pressure, level, temperature, and flow ranges, with a square-root mode for DP flow elements and a percent and 1-5 V conversion chart.Absolute & Gauge Pressure Converter
Convert gauge pressure to absolute pressure and back in kPa, bar, psi and MPa, with an altitude-based atmospheric pressure estimate and vacuum handling built in.Pipe Velocity Calculator
Velocity from flow rate and pipe inner diameter, flow from velocity, or the minimum pipe size for a velocity limit, in metric and US units.Hydrostatic Pressure Calculator
Pressure to liquid level or depth, level to pressure, and level from a 4-20 mA reading, with SG presets for water, seawater, and diesel.Flow Meter K-Factor Calculator
Flow rate from pulse frequency and K-factor, K-factor from a pulse count and volume, or a corrected K from a proving run.Mass Flow Rate Calculator
Volume flow and density to mass flow, back again, or gas actual flow to Nm3/h, SCFM, and kg/h.Pressure Unit Converter
One value in, 13 units out: psi, bar, kPa, MPa, kgf/cm2, Torr, inWC and the rest, with significant figure control.Pipe Pressure Drop Calculator
Darcy-Weisbach friction loss with automatic friction factor: flow, bore, length and material in; kPa, psi, bar and per-100-ft out.Horizontal Tank Volume Calculator
Fill volume and total capacity of a horizontal cylindrical tank from diameter, length, and dip depth, with flat, elliptical, or hemispherical heads.
Tank Volume Calculator
Capacity, liquid volume from level, percent full, weight and a dip chart for vertical cylindrical and rectangular tanks.4-20 mA to Voltage Calculator
Current to volts and back, burden resistor sizing, loop compliance and NAMUR levels.
More calculators are on the way, covering hydrostatic level and the unit conversions we get asked about most. If you need a calculation that is not here yet, ask our application engineers and we will run it for you.
Background reading
Every tool links back to a guide that explains the underlying method. Start with the flow rate and pressure relationship guide for the formulas behind the pressure-to-flow calculator, read how a 4-20 mA current loop works for the signal calculator, or browse our product range when you already know what you need.
Request a quote
Tools narrow the choice; a quote settles it. Send your medium, line size, range, and process conditions and our application engineers will return a sized, documented configuration.