Explore fire behaviour, fuel moisture, radiant heat, WUI resilience, indoor smoke, independent water systems, emergency power and engineering utilities through free interactive tools built around transparent calculations.
The toolbox is organised as linked technical domains. Individual calculators can stand alone, while related tools form practical analysis chains from fuel conditions to fire behaviour, structural resilience, smoke protection, water supply and backup power.
Inputs, assumptions, units and mathematical relationships are exposed wherever possible so results can be inspected rather than treated as a black box.
Fireline Intensity Calculator
Explore Byram's fireline-intensity relationship using heat of combustion, flaming fuel consumption and rate of spread.
Flame Length Calculator
Convert between fireline intensity and estimated flame length with a bidirectional Byram-based workflow.
Rate of Spread Calculator
Calculate linear wildfire spread rate, travelled distance or elapsed time with transparent unit conversion.
Wildfire Fire Growth Calculator
Explore constant-condition elliptical wildfire growth with head, backing, width, area and perimeter outputs.
Defensible Space Calculator
Visualise treatment areas around a rectangular home and compare surrounding protection-zone geometry.
Wildfire Zone 0 Calculator
Calculate Zone 0 area, perimeter and planning quantities for gravel or paver treatment around a structure.
Wildfire Retrofit Cost Calculator
Build an editable low-to-high planning budget for wildfire home-hardening and retrofit work.
Wildfire Smoke CADR Calculator
Size clean-air delivery from room dimensions and target ACH, then estimate the number of air cleaners required.
Indoor Wildfire Smoke PM2.5 Calculator
Model single-zone indoor PM2.5 for wildfire smoke using infiltration, indoor volume and portable air cleaning.
Wildfire Smoke PM2.5 AQI Calculator
Convert bidirectionally between PM2.5 concentration and US EPA Air Quality Index using the current breakpoints.
Wildfire Sprinkler Water Runtime Calculator
Estimate water storage, flow, refill and runtime for independent wildfire-preparation sprinkler systems.
Wildfire Water Pump Sizing Calculator
Calculate flow, hose friction, total dynamic head and pump input power for independent water systems.
Portable Power Runtime Calculator
Estimate battery runtime from capacity, load, conversion efficiency and retained reserve, or solve backwards from required runtime.
Runtime Explorer
Explore battery and fuel-generator runtime curves, multi-device battery planning and practical backup-power scenarios.
The current system contains 17 interactive tools across 8 technical domains. New calculators can be added inside the same architecture without turning the hub into an unstructured list.
Use these tools alongside Tecnobosque Wildfire Science & Engineering, Wildfire Black Box, Smoke & Indoor Air Quality, Emergency Power and Home Hardening resources for deeper context and interpretation.
INTERACTIVE POWER PLANNING
Battery & generator runtime graphs
See how electrical demand changes estimated runtime. Enter watts, or use amperes with the load voltage and, for single-phase AC, power factor. Explore a battery power station or a fuel generator and view the results as a graph or a data table.
Know the limits: battery estimates assume a steady load and no recharge. Generator estimates require at least two documented fuel-consumption points for the same model and fuel; the tool does not estimate beyond their load range.
Read the air-purifier backup-power guide, assumptions and worked examples.
Planning estimates, not guaranteed runtimes or a safety assessment. Check equipment output limits and follow manufacturer and local emergency guidance. Never use a fuel-burning generator indoors or in a garage.