Urban Heat Island Calculator

Temperature differential from land cover and albedo.

City population

Impervious surface (%)

Tree canopy / green space (%)

Urban albedo (0-1)

Rural albedo (0-1)

Solar radiation (W/m²)

Wind speed (m/s)

Anthropogenic heat (W/m²)

Tab to move between fields

UHI intensity (°C)

4.2

Nighttime UHI (°C)7.14

Summer peak UHI (°C)7.56

Cooling energy increase (%)29.4%

Albedo heating (°C)0.2

Greenspace cooling (°C)0.6

Wind dispersal factor0.69

Cool roof mitigation (°C)0.28

How to Use This Calculator

Enter city population, impervious surface (%), and tree canopy/green space (%).
Set urban and rural albedo values, solar radiation (W/m²), wind speed (m/s), and anthropogenic heat (W/m²).
Review UHI Intensity (°C), Nighttime UHI (°C), and cooling potential from interventions.
Each 10% increase in green space typically reduces UHI intensity by 0.3–0.5°C.

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