Passive House Savings Calculator
Compares regular, energy-efficient, and passive-house construction/heating scenarios and simple payback. Passive-house demand defaults to 15 kWh/m²/year.
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Calculator Group: Population & Ecology
Shannon Diversity Index Calculator
Calculates Shannon diversity, species richness, Pielou evenness, total abundance, and average abundance from up to 40 population counts.
Smog Calculator
Benzo[a]pyrene is one component of combustion-related air pollution, and inhaled dose depends on concentration as well as time spent indoors and outdoors. This calculator…
Carrying Capacity Calculator
Carrying capacity is often introduced as a fixed ecological ceiling, but in a logistic-growth model it can also be inferred from how fast a…
CO₂ Breathing Emission Calculator
Estimates indoor CO₂ concentration from people, activity, time, outdoor CO₂, room volume, and ventilation using a well-mixed room mass-balance model.
Fish Mercury Calculator
Calculates mercury per serving and compares it with the weekly EPA reference-dose equivalent for body weight.
Lotka-Volterra Calculator
Numerically integrates the classic Lotka–Volterra predator–prey equations and reports final and peak populations.