Chemical Engineering Calculators and Unit Converters

Use these tools to convert engineering units, estimate pipe-flow conditions, and prepare inputs for pressure drop and heat transfer calculations.

Pipe-flow workflow: convert the flow rate, calculate pipe velocity and diameter, check Reynolds number, then estimate pipe pressure drop.

Pipe Flow and Pressure Loss

Pipe Velocity and Diameter

Calculate velocity from flow rate and diameter, or estimate a required pipe size.

Reynolds Number

Check laminar, transitional, or turbulent pipe-flow conditions.

Pipe Pressure Drop

Estimate pressure loss for fluid flow through a pipe.

Packed Bed Pressure Drop

Estimate pressure drop through a packed bed from operating conditions.

Flow Rate

Convert volumetric flow rate units for pipe and equipment calculations.

Mass Flow Rate

Convert mass flow rate units such as kg/s, kg/h, and lb/s.

Pressure

Convert pressure units for line loss and operating pressure checks.

Viscosity

Convert dynamic viscosity units used in Reynolds and pressure drop calculations.

Kinematic Viscosity

Convert kinematic viscosity units for Reynolds number checks.

Density

Convert density units used with viscosity and velocity inputs.

Heat Transfer and Thermal Properties

Temperature

Convert between Celsius, Fahrenheit, Kelvin, and Rankine.

Heat and Energy

Convert J, kJ, cal, kcal, BTU, and kWh.

Specific Heat

Convert mass-based and molar specific heat units.

Thermal Conductivity

Convert conductivity units for heat transfer work.

Materials, Concentration, and Surface Properties

Concentration

Convert molar, mass, and volume concentration units.

ppmv to mg/m3

Convert dry-gas concentration using molecular weight, temperature, and absolute pressure.

Density

Convert mass and molar density units for material properties.

Viscosity

Convert dynamic viscosity units for fluid property data.

Kinematic Viscosity

Convert kinematic viscosity units such as cSt and m2/s.

Surface Tension

Convert N/m and dyne/cm for surface property checks.

Basic Unit Conversions

Length

Convert metric and imperial length units.

Mass

Convert mass units such as g, kg, ton, lb, and oz.

Volume

Convert volume units such as m3, L, mL, and gallons.

Area

Convert area units for surfaces, cross sections, and plots.

Force

Convert N, kgf, lbf, dyn, and related force units.

Speed

Convert speed units such as m/s, km/h, ft/s, and mph.

Angle

Convert angle units such as degrees, radians, and gradians.