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.
START WITH YOUR QUESTION
One problem. A clear path through the tools.
Choose what you want to work out. Follow three connected steps, or use the searchable directory below to go straight to a calculator.
01SMOKE & INDOOR AIRPlan cleaner indoor air
Start with your room, then connect filtration needs to backup power.
Have ready: Room dimensions · target air changes · purifier watts
Size clean-air delivery
Calculate the CADR required for your room and chosen air-change target.
Size clean-air delivery →Compare air purifiers
Use the sizing result to assess the models and specifications in our guide.
Compare air purifiers →Estimate backup runtime
Explore how purifier power demand changes battery runtime.
Estimate backup runtime →
02OUTAGES & BACKUP POWERKeep essential loads running
Turn an equipment list into an energy requirement before comparing systems.
Have ready: Appliance watts · daily hours · days without recharge
Build your load profile
Estimate daily energy, nominal battery capacity and continuous inverter output.
Build your load profile →Check a battery’s runtime
Test a known capacity against a steady load, efficiency and reserve.
Check a battery’s runtime →Compare portable power stations
Review capacity, output and selection criteria for outage planning.
Compare portable power stations →
03HOME & SURROUNDINGSPlan work around your home
Move from treatment-area geometry to quantities and an editable budget.
Have ready: Building dimensions · treatment width · local unit costs
Map treatment areas
Explore defensible-space zone geometry around a rectangular home.
Map treatment areas →Estimate Zone 0 quantities
Calculate perimeter, treatment area and gravel or paver quantities.
Estimate Zone 0 quantities →Build a retrofit budget
Compare low-to-high planning costs for selected home-hardening work.
Build a retrofit budget →
04FIRE SCIENCE & ENGINEERINGConnect intensity, flames and heat
Explore three related calculations while keeping their assumptions visible.
Have ready: Fuel consumption · heat of combustion · spread rate
Calculate fireline intensity
Apply Byram’s relationship with consistent units.
Calculate fireline intensity →Explore estimated flame length
Convert fireline intensity to flame length using the calculator’s empirical relationship.
Explore estimated flame length →Study radiant heat separately
Explore source emissive power, view factor and transmissivity; flame length alone does not determine heat flux.
Study radiant heat separately →
Planning and educational workflows. Results are not transferred automatically between tools. Check each calculator’s assumptions; these paths do not assess whether a home is safe or replace official emergency instructions.
Search by name, output or task. Combine your search with a category below.
Showing all 19 tools
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.
Smoke Ventilation Calculator
Calculate smoke-dispersion ventilation rate from mixing height and transport wind, with a separate NWS interpretation profile.
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.
Home Backup Battery Sizing Calculator
Build a household critical-load profile, estimate required battery storage and inverter output, and compare listed systems against your planning targets.
Record the tool URL, access date, every input with its units, the chosen assumptions and the displayed result. Keep these together in your report: a page link alone may not preserve your settings. Label calculated outputs as model estimates, and distinguish measured inputs from assumed values.
Use this reporting format: Tecnobosque, [tool title], [URL], accessed [date]. Inputs: [values and units]. Assumptions: [settings]. Estimated output: [result and units]. If the tool identifies an underlying method or source, consult and cite it separately when discussing that method.
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.