Heat‑Island Savings Forecaster

Estimate how much cooler your yard (and home) will be—and how much electricity you’ll save—when you swap hard surfaces for greenery.

Surface area to replace (m²) Current surface type Dark concrete / asphalt (very hot) Light concrete pavers Colorbond® roof Light gravel Custom ΔT (°C) Replacement surface Synthetic turf (cool‑yarn) Natural lawn / groundcover Cool paving (high‑albedo) Custom ΔT (°C) City / climate zone Sydney / NSW Coast Brisbane / SE QLD Melbourne / VIC Perth / WA Adelaide / SA Canberra / ACT Hobart / TAS *Figure is cooling‑degree‑hours (kWh saved per °C per m² per year ×100) Calculate