Carbon Footprint Calculator | Honeyguide Energy Engineering

Organisation details

This information appears on your emissions report. Choosing your country is a label only in this version — grid emission factors are entered manually in Scope 2 (a built-in country database is planned for a future update).

Organisation name

Country / region

Reporting period start

Reporting period end

How this tool works

1. Log activities. Use the Scope 1, 2 and 3 tabs to add each fuel, vehicle trip, purchase or utility bill as a line item. Every line is converted to kg CO₂e instantly using the selected emission factor.

2. Refrigerant & gas losses use IPCC AR6 (2021) 100-year GWP values — the current international standard for corporate GHG reporting, replacing the older AR4 values (methane 25→27, N₂O 298→273, and updated values for HFCs/PFCs). A note flags each figure so you can see exactly what changed.

3. Review your Report tab for the Scope 1/2/3 breakdown, category chart, and export options (CSV, JSON, or print/save as PDF).

4. Nothing is sent anywhere. This tool runs entirely in your browser. Use Export session (JSON) before closing the tab if you want to resume later — import it back in on your next visit.

Fuels — stationary & mobile combustion

Gaseous, liquid and solid fuels burned on-site or in owned equipment (boilers, generators, furnaces).

Bioenergy

Biofuels, biomass and biogas burned on-site. Reported separately per GHG Protocol convention (biogenic CO₂ is tracked but excluded from the Scope 1 total; shown here for completeness).

Refrigerants & other fugitive gases AR6 GWP

Enter the mass of gas lost/topped-up (kg) from refrigeration, air-conditioning or fire-suppression equipment. Converted to CO₂e using IPCC AR6 100-year global warming potentials.

Owned vehicles

Passenger cars, motorbikes, vans and HGVs owned or operated by your organisation.

Passenger vehicles

Delivery vehicles (vans & HGVs)

Purchased electricity, heat, steam & cooling

Select your country for Purchased electricity to auto-fill a default grid emission factor (from Ember/OWID national generation-mix data, plus official figures for a few markets) — or skip the dropdown and enter your own supplier/utility factor directly. Heat, steam and cooling currently require a manual factor.

Scope 3 — value chain emissions

The GHG Protocol defines 15 Scope 3 categories. This version covers the six most commonly reported by organisations like yours; the rest are on the roadmap.

Emissions report

Scope 1 / 2 / 3 breakdown

By category

Full activity log

Methodology notes. Global warming potentials: IPCC Sixth Assessment Report (AR6), 100-year time horizon, as published in the GHG Protocol's official AR6 GWP reference table (Aug 2024) — methane (non-fossil/combustion) 27.0, methane (fossil/fugitive) 29.8, nitrous oxide 273. Fuel, vehicle, travel, freight, waste, water and material factors: UK DEFRA 2021 conversion factors, a widely-used international default set; several common refrigerant blends (R404A, R407A/C/F, R410A, R507A, R508B) were recalculated to AR6 from their published component compositions — rarer blends retain their originally-published GWP where an AR6 recalculation wasn't available, flagged in the line item. Scope 2 electricity grid factors default to national generation-mix data from Ember/Our World in Data (2024/2025), with a few markets (South Africa, UK, US) using their own official/national-agency figures where available — these are location-based, generation-mix averages, not supplier-specific or market-based factors, and every value can be overridden with your own supplier data. Heat, steam and cooling factors are always user-entered. Flight factors exclude radiative forcing (RF) multipliers, consistent with GHG Protocol Scope 3 guidance. This is a self-assessment tool, not a substitute for a verified GHG inventory.