HDB Embodied Carbon (Quick Calculator)

A lightweight, editable estimator for upfront embodied carbon (A1–A5 style) for an HDB-like residential block. Edit factors No login needed

1) Building info

Gross Floor Area (GFA), m²

Used to compute intensity (kgCO₂e/m²).

Structure type

Only informational for now (no hidden multipliers).

2) Material quantities

Enter what you know. Leave blank = 0.

Concrete volume (m³)

Concrete factor (kgCO₂e / m³)

Set to your chosen dataset / EPD value.

Rebar (t)

Rebar factor (kgCO₂e / t)

Structural steel (t)

Steel factor (kgCO₂e / t)

Aluminium (t)

Aluminium factor (kgCO₂e / t)

Glass (m²)

Glass factor (kgCO₂e / m²)

Timber (m³)

Timber factor (kgCO₂e / m³)

Some datasets treat biogenic carbon differently; be consistent.

Note: This is a quick estimator. For formal reporting, follow a recognised whole-life carbon/LCA methodology and use verified datasets/EPDs.

Results

Total embodied carbon (kgCO₂e)

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Intensity (kgCO₂e / m² GFA)

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Breakdown

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References (BCA)

If you want, I can iterate this page to match a specific BCA/Green Mark submittal format once you tell me which scheme and what boundary (A1–A5 / A1–C4).

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