Engineering Calculators
Interactive calculators for common engineering calculations. These are separate from the deterministic unit conversion pages — calculators combine multiple inputs and may require user-supplied properties like density or efficiency.
Every calculator shows its formula, assumptions, limitations, and a worked example. More calculators are planned for future releases.
4–20 mA Scaling Calculator
Scale a 4–20 mA analog signal to a process variable, or reverse-calculate the mA value for a given process value.
Head ↔ Pressure Calculator
Convert between fluid head (height) and pressure using density and gravity.
Mass Flow ↔ Volumetric Flow Calculator
Convert between mass flow rate and volumetric flow rate using fluid density.
Pipe Velocity / Flow / Diameter Calculator
Calculate pipe velocity, volumetric flow, or internal diameter from the other two values.
Pump Hydraulic Power Calculator
Calculate hydraulic power and shaft power from flow, head, density, gravity, and pump efficiency.
Heat Duty Calculator
Calculate sensible heat duty from mass flow rate, specific heat capacity, and temperature change. Continuous and batch modes.
Residence Time Calculator
Calculate hydraulic residence time, vessel volume, or volumetric flow rate from the other two values.
Tank Volume Calculator
Calculate the internal volume of rectangular, vertical cylindrical, or horizontal cylindrical tanks from dimensions.
Thermal Expansion Calculator
Calculate linear thermal expansion, final length, and thermal strain from initial length, expansion coefficient, and temperature change.
Reynolds Number Calculator
Calculate the Reynolds number for internal pipe flow and classify the flow regime as laminar, transitional, or turbulent.
Ohm's Law Calculator
Calculate voltage, current, or resistance using Ohm's law (V = IR). DC / resistive circuit basis.
Electrical Power Calculator
Calculate DC/resistive electrical power using P = VI, P = I²R, or P = V²/R.
Voltage Drop Calculator
Calculate resistive voltage drop, percent drop, and load voltage for a simple DC circuit or cable run.
RTD Temperature Calculator
Estimate temperature from RTD resistance using the simple linear approximation for Pt100 or Pt1000 sensors.
Sensor Percent Span / Range Calculator
Calculate percent of span from a process value and instrument range, or reverse-calculate the process value from percent span.
Dilution Calculator
Calculate dilution using C₁V₁ = C₂V₂. Solve for any one of concentration or volume when the other three are known.
Concentration Calculator
Calculate mass concentration, solute mass, mass fraction, and percent by mass from basic inputs.
Slurry Solids Calculator
Calculate percent solids, solids mass flow, slurry mass flow, or liquid mass flow for a slurry stream on a mass basis.
Tank Turnover Calculator
Estimate tank turnover rate, turnover time, and total turnovers from flow rate, tank volume, and time period.
Pump Affinity Laws Calculator
Estimate new flow, head, and power when pump speed changes using the affinity laws (speed-change scaling).
Hydrostatic Pressure Calculator
Calculate the pressure at the base of a static liquid column from fluid density, height, and gravity, or solve for height or density.
Bernoulli Equation Calculator
Apply the Bernoulli equation for ideal incompressible flow between two points. Calculate P₂ from pressures, velocities, elevations, and optional user-supplied head loss.
Differential Pressure Calculator
Calculate differential pressure from two pressures, or from density and liquid height. Simple arithmetic and static head modes.
Orifice Flow Calculator
Calculate volumetric flow through an orifice plate from orifice diameter, discharge coefficient, differential pressure, and fluid density.
Pipe Flow Rate Calculator
Calculate volumetric flow rate, velocity, or internal diameter for a circular pipe from the other two values using continuity.
Darcy-Weisbach Pressure Drop Calculator
Calculate pressure drop and head loss in a straight circular pipe from user-supplied Darcy friction factor, pipe geometry, fluid density, and velocity.
Friction Factor Calculator
Calculate the Darcy friction factor from Reynolds number and relative roughness using the laminar formula or Swamee-Jain explicit turbulent approximation.
Minor Loss / K-Value Loss Calculator
Calculate head loss and pressure loss from a user-supplied loss coefficient (K-value) for a pipe fitting, valve, or other flow obstruction.
Equivalent Length Calculator
Convert a fitting loss coefficient (K-value) to an equivalent length of straight pipe, or calculate K from equivalent length and friction factor.
Pipe Head Loss Calculator
Combine major (friction) and minor (K-value) head losses into a total head loss and equivalent pressure drop for a pipe run.
These calculators cover instrumentation scaling, fluid head/pressure, mass/volumetric flow, pipe velocity, pump hydraulic power, heat duty, residence time, tank volume, thermal expansion, Reynolds number, Ohm's law, electrical power, voltage drop, RTD temperature, sensor percent span, dilution, concentration, slurry solids, tank turnover, pump affinity laws, hydrostatic pressure, Bernoulli equation, differential pressure, orifice flow, pipe flow rate, Darcy-Weisbach pressure drop, friction factor, minor loss, equivalent length, and pipe head loss. Additional calculators are planned for future packages.