Supply Chain & Shipping Carbon Calculator

Perform an enterprise logistics audit. Calculate the exact CO2e emissions of your freight routes based on weight, distance, and transit mode.

Utilizes standard Tonne-Kilometer (tkm) multiplier averages. Exact route efficiency heavily depends on 'Last Mile' delivery vehicles and container fill-rates (eliminating empty space).

Emissions Ledger

Enter your cargo weight, route distance, and transport mode to audit the supply chain.

Scope 3 Liability: Decoding the Tonne-Kilometer

Supply chain logistics usually represent the largest piece of a company's total carbon footprint, legally classified as Scope 3 Category 4 (Upstream Transportation). Because companies usually outsource their shipping to third-party carriers, they often ignore the math. However, you are still legally responsible for the footprint. Our Supply Chain Carbon Calculator bypasses vendor greenwashing to show you the raw physics of moving mass across the Earth.

The Master Metric: Tonne-Kilometers

You cannot calculate logistics emissions purely by distance. Moving a feather 1,000 miles is different than moving a bank vault 1,000 miles. Engineers use the Tonne-Kilometer (tkm):

Emissions = (Weight in Tonnes × Distance in Km) × Mode Emission Factor
  • •The Air Freight Penalty: Airplanes must burn massive amounts of fuel simply to fight gravity and keep the heavy cargo in the air. Air freight produces roughly 50 times more CO2e per tonne-kilometer than ocean freight. If it doesn't need to arrive tomorrow, put it on a boat.
  • •The Buoyancy Hack: Ocean shipping is slow, but it is a masterclass in physics. Because the water supports the weight of the massive cargo, the ship requires incredibly little energy to push a container forward. Ocean freight operates at the absolute global minimum for carbon intensity.

Optimizing The Last Mile

Even if you use ultra-efficient rail or ocean freight for the long haul, your supply chain can be ruined by the "Last Mile." If a heavily polluting diesel truck drives an empty container 50 miles from the port to your warehouse, that short trip can generate more carbon than a 1,000-mile rail journey. Ensure your logistics partners are utilizing full truckloads (FTL) and transitioning their local fleets to Electric Vehicles.

Corporate Auditing

Freight is only one piece of the corporate ESG puzzle. To calculate the direct emissions of your company-owned vehicles and your facility heating, jump to our Scope 1 & 2 Emissions Calculator. If you want to calculate the cost-savings of switching your local delivery vans to electric, use the EV Fleet Savings Calculator!

Explore Next: Corporate Sustainability

Scope 1 & 2 Auditor

Calculate the remaining carbon footprint of your physical commercial facility and electricity.

EV Fleet Savings

Calculate the exact financial savings of shifting your local delivery trucks to electric.

Product Embedded Water

Discover how many thousands of liters of hidden water are embedded inside your cargo.

Frequently Asked Questions

Is Rail really better than Trucking?

Massively. While both use diesel engines, trains use steel wheels on steel tracks, completely eliminating the 'rolling resistance' that rubber tires experience on asphalt. A standard freight train can move one tonne of cargo nearly 500 miles on a single gallon of fuel.

Why is Air Freight so heavily penalized?

Thermodynamics. An airplane must burn catastrophic amounts of high-octane jet fuel strictly to overcome gravity. If you ship 500kg via ocean, the buoyancy of the water supports the weight for free. In the air, you pay a massive carbon tax just to keep the box off the ground.

What does 'Scope 3 Category 4' mean?

Under the global Greenhouse Gas (GHG) Protocol, a company's emissions are broken into categories. Scope 3 covers your indirect supply chain. Category 4 specifically refers to 'Upstream Transportation and Distribution'—meaning the freight required to move materials between your suppliers and your own facilities.

Do empty trucks still generate emissions?

Yes, and this is the biggest secret in logistics. If a truck drives 500 miles fully loaded, unloads the cargo, and drives 500 miles back empty, that empty return trip (Deadheading) still burns massive amounts of diesel. Highly optimized supply chains utilize backhauling to ensure trucks never run empty.