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Calcimator

Prescribed Burn Planning

Estimate fire behavior for prescribed burns including rate of spread, flame length, and intensity based on fuel, wind, slope, and moisture conditions.

Inputs

tons/acre
mph
%
%

Results

Fire Behavior Classification

Low — Hand tools effective

Estimated Flame Length

1.3 ft

Condition AssessmentWithin prescription — conditions favorable
Rate of Spread0.1 chains/hr
Rate of Spread0.1 ft/min
Fireline Intensity10 BTU/ft/s
Fuel Consumed1%
PM2.5 Emissions0 tons/acre
Heat Per Area8,712
Heat Per (sq ft)100
How to Use This Calculator
  1. Enter the Fuel Load in tons/acre and the Wind Speed (mid-flame height) in mph.
  2. Enter the Slope percentage and Fine Fuel Moisture percentage for current conditions.
  3. Review the Fire Behavior Classification and Condition Assessment to decide if conditions are within prescription.
  4. Check Flame Length and Rate of Spread in chains/hour to verify fireline intensity is controllable.
  5. Use PM2.5 Emissions and Fuel Consumed percentage for smoke management planning.
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