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Coefficient units

Cv and Kv Converter

Convert valve flow coefficient values between Cv and Kv for quick comparison across pneumatic valve catalogs.

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Coefficient units

Run the calculation

Convert valve flow coefficient values between Cv and Kv for quick comparison across pneumatic valve catalogs.

Engineering inputsCv / Kv Converter

Enter the known application values. Outputs update instantly as units or assumptions change.

Source coefficient
Use these values for preliminary sizing before final datasheet review.

Engineering visual

Cv / Kv Converter calculation map

The physical quantity stays unchanged while its numerical value and unit notation are expressed on equivalent scales.

Cv / Kv Converter calculation mapThe physical quantity stays unchanged while its numerical value and unit notation are expressed on equivalent scales.SOURCE VALUE + UNITEQUIVALENT VALUEREFERENCE BASISTARGET UNITSAME PHYSICAL QUANTITY
  1. 01Coefficient value
  2. 02Calculate and compare
  3. 03Cv
Cv
Kv

Calculation reference

What this tool checks.

This converter uses the common reference conversion between Cv and Kv. Final valve selection still requires flow curves and operating conditions.

Inputs

  • Coefficient value
  • Source coefficient

Outputs

  • Cv
  • Kv

Engineering guide

Use the result with the right context.

Use your application data for a preliminary estimate, then check the result against the relevant technical or official guidance.

Calculation workflow

  1. Enter the known application values, including Coefficient value, Source coefficient.

  2. Run the calculation using one consistent set of units and reference conditions.

  3. Review Cv, Kv, then compare the result with the component datasheet and application margin.

Assumptions and limits

  • A unit conversion preserves the entered physical quantity but does not correct its pressure, temperature, or reference state.

  • Check whether the source value is gauge, absolute, standard, normal, free-air, or actual before using the converted result.

FAQ

Common review questions.

01Tool noteAre Cv and Kv the same thing?

They both describe valve flow coefficient but use different reference units. Conversion helps compare catalogs, but it does not replace full valve sizing.

02Tool noteWhy do pneumatic catalogs use different coefficients?

Manufacturers serve different regions and standards. North American catalogs often use Cv, while many metric catalogs use Kv or conductance data.

03Tool noteWhat should I verify after using the Cv / Kv Converter?

Check the entered units and reference conditions, then compare the calculated outputs with manufacturer ratings, application safety margins, transient loads, installation losses, and measured machine performance.