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Calcimator

Peak Flow Monitoring Calculator

Personal best percentage and zone classification.

Inputs

Results

% of Personal Best

80%

Zone (0=Green, 1=Yellow, 2=Red)0
% of Predicted63.5%
Predicted PEF (L/min)630
Green Zone Threshold (L/min)400
Yellow Zone Threshold (L/min)250
PEF Variability (%)20%
How to Use This Calculator
  1. Enter your current PEF (L/min) and personal best PEF (L/min).
  2. Enter age (years), height (cm), and sex to calculate the predicted normal PEF for comparison.
  3. Review your percent of personal best and percent of predicted PEF.
  4. Check your asthma zone (green >=80%, yellow 50-79%, red <50%) and recommended action.
  5. Record daily readings at the same time each day for meaningful trend monitoring.
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