A4–A5 Carbon Calculator

Prove that smarter logistics and faster, cleaner sites beat the industry baseline — not by hiding the materials, but by wasting nothing in transit or execution.

A different way to count A4 & A5

📦

The industry default

Material-driven. Punch in a quantity, the tool slaps on a generic transport distance and a fat 5–10% waste penalty. Efficient builders get the same score as sloppy ones.

🎯

The Simplicity way

Logistics-driven. Mass sets the floor, but your real distances, full trucks, tiny waste factor and shorter programme are the levers — and every saving is shown against the baseline.

A1–A3 Product Making the materials
A4 Transport Getting them to site
A5 Construction Building it — energy, fuel & waste

Your Projects

No logins yet — just pick a project, or start a new one. Everything you change saves automatically.

A4 · Transport to Site

Add the major materials and where they come from. We convert volumes to mass, run the industry baseline (BRANZ default distances, 10% waste, part-full trucks) against Simplicity's optimised logistics (2% waste, full trucks), and show the carbon you save.

Materials & supply origins

MaterialQuantitySupply originMass
📦
0
Baseline A4 (kgCO₂e)
0 kg/m²
🎯
0
Simplicity A4 (kgCO₂e)
0 kg/m²
📉
0
Carbon saved (kgCO₂e)
0% below baseline

Where the savings come from

Every material is a multi-leg journey

🏭Factory / quarry
🚢 Sea freightcontainer ship, runs full
Port of entry
🚚 Roadload factor & waste apply here
🏗️Auckland site

Sea distances use container-freight factors; the local road leg is where Simplicity's full trucks and low waste cut the most carbon. Distances come from the BRANZ Transport Scenarios database; factors from MfE 2023 (ME1781).

A5 · Construction & Installation

A5 is the physical act of building — site energy, machine fuel and construction waste. Scrub through the programme week by week and watch how the trades stack up. The default approach is linear; the Simplicity approach overlaps trades for a shorter, sharper programme.

Weekly site activity by trade

Week 1
👷
0
People on site
📦
0
Material (t/week)
🏗️
0
Equipment (mach-hrs)
0
Fuel (L diesel)
0
Electricity (kWh)

The speed dividend: Baseline vs Simplicity

Where the real A5 numbers will come from

A5 today is mostly guesswork from floor area. To prove Simplicity's efficiency we capture verifiable primary data on site. The figures above are placeholders — these are the tools that will feed real data in: