GHG Protocol-aligned · smart import · aggregates · de-dupes · self-checks

From messy data to a traceable carbon footprint

Paste raw activity data — even monthly meter tables, invoices and supplier returns. The tool maps each line, converts units, sums time-series and estimates missing periods, removes duplicates, and flags what looks wrong. The hard part of carbon accounting was never the arithmetic.

Smart import — paste messy data (items, or month/quarter tables)

How to write your data — a few tips
  • One activity per line: what it is, the quantity, the unit. Diesel for the delivery trucks: 12,400 litres
  • Say what the fuel was burned in — vehicles, or a boiler, heater or generator. It decides whether the report lists it as mobile or stationary combustion. Natural gas, boiler at the Laval plant: 8,420 m³
  • State the period once, at the top. Reporting period: 1 January 2025 to 31 December 2025
  • Say where the electricity was used (province, state or country) — the grid factor depends on it. Electricity, Montréal office (Québec): 84,000 kWh
  • Monthly figures: a heading, then one month per line. Electricity (kWh) Jan 2025 12,400 Feb 2025 11,900
  • Money: say what was bought and the currency. Legal fees: $8,000 CAD A quantity (litres, kWh, kg, nights) is always more accurate than money.
  • Refrigerants: the gas and the kilograms added. R-410A top-up, rooftop unit 2: 4.5 kg
  • Travel: the distance if you have it; otherwise the cities, and one way or return. Flights Montréal–Toronto return, 3 staff
  • Leave out totals and subtotals that repeat the lines above them.
  • Thousands: 12,400 is clearest. 12 400 works too; when a number could be read two ways, the tool asks.

En français — une activité par ligne, avec la quantité et l'unité : Gaz naturel, chaudière de l'usine : 8 420 m³ · Diesel pour les camions de livraison : 12 400 litres · Électricité, bureau de Montréal (Québec) : 84 000 kWh · Période de facturation : du 1er janvier 2025 au 31 décembre 2025

Employees (optional):
or drop files or a folder on this box — PDF (also scanned), photos of bills (JPG, PNG, iPhone HEIC), Excel, CSV, Word, email (.eml, Outlook .msg), text, Green Button XML, zip. They are read on this computer and never uploaded; you tick what goes in.

Complete analysis — result, inventory, review and report

Inventory — edit any line, add more by hand

The International — DESNZ/DEFRA set governs Scope 1 fuel factors and Scope 2 — it decides which grid is assumed when your data never names one. A Scope 2 row that does name a region keeps that region's own published factor whatever is selected here. Set automatically from the grid found in your data; change it here to override. Every factor in the table below shows its publisher and the date that source was published.
Scope 1 — direct—0 t
Scope 2 — electricity & heat—0 t
Scope 2 — market-based: certificates & contracts—
Certificates, green tariffs, power purchase agreements or your supplier's own rate change only the market-based Scope 2 figure. Everything entered here is self-declared and shown as such in the report. Electricity no instrument covers is priced at its grid's published residual mix, or at the location factor where none is published.
Scope 3 — value chain0 t
Scope 3 — all 15 categories —
The GHG Protocol asks every Scope 3 category to be accounted for: a category with lines here is Included. Mark each other one Excluded or Not relevant, with the reason — a reason is required. Anything left is reported as Not assessed. The report lists all fifteen (A5.6).
Scope 3 — Category 3: fuel- and energy-related—
Computed from your Scope 1 and 2 lines, never typed in: the upstream (well-to-tank) emissions of the fuels you burn, and the electricity and heat lost before it reaches you. Each line names its factor and publisher.
Carbon credits retired — reported separately—
Offsets your company bought and retired are never subtracted from the inventory: the GHG Protocol Corporate Standard reports them separately, as information outside the scopes, split into removals and reductions. Everything here is self-declared. Energy certificates (RECs, GOs) are not offsets — they belong under Scope 2 — market-based.
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Result — footprint & data-quality checks

0t CO₂e for the period entered
Recalculated from every line as you edit.
0%of your footprint is Scope 3 — the emissions you don't own, but cause.
Scope 1 — direct
Scope 2 — energy
Scope 3 — value chain

Data-quality checks (the part a calculator skips)