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FEV1 Predicted Calculator

Work out fev1 predicted instantly with clear inputs, formula shown and shareable results.

About FEV1 Predicted Calculator

Uses the European Community for Steel and Coal (ECSC/ERS 1993) reference equations for FEV1 in adults of European descent.

Formula

ECSC 1993 reference equations

Men: FEV1 (L) = 4.30 x height(m) - 0.029 x age - 2.49. Women: FEV1 (L) = 3.95 x height(m) - 0.025 x age - 2.60

Worked example

With the default values below, FEV1 Predicted Calculator returns Predicted FEV1 of 3.87. Change any input above and every figure here is recalculated in your browser.

Inputs used

Sexone of Male, Female
Male
Ageaccepts 18–90 years
40 years
Heightaccepts 120–210 cm
175 cm

Results

Predicted FEV1
3.87 L
80% of predicted
3.10 L
Predicted FEV1
3,875 mL

Step by step

  1. 1Values used
  2. 2ECSC 1993 reference equations
  3. 3Predicted FEV1= 3.87 L
  4. 480% of predicted= 3.10 L
  5. 5Predicted FEV1= 3,875 mL

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Are these equations population specific?

Yes. GLI-2012 multi-ethnic equations are now preferred where available; the ECSC set applies to European-descent adults.

What counts as reduced?

Below 80% of predicted is the classic cut-off, though the lower limit of normal from GLI is statistically better.

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