All our distance calculations comply with the IATA Great-Circle Distance standard, and our CO₂ emission calculations follow the ICAO methodology .
✓ IATA✓ ICAOCalCo2AI instantly calculates CO₂ emissions for both your flights and hotel stays using IATA & ICAO standards. Emission values vary by hotel star rating and country.
No format adjustment needed — AI recognises your data and automatically fills in missing distance and CO₂ values.
Query flight and hotel CO₂ directly from your systems via REST API. No Excel needed — one request, IATA & ICAO compliant results.
| Ticket No | PNR | Flight No | Route | Date | Cabin | CO₂ (Flight) | Total CO₂ |
|---|---|---|---|---|---|---|---|
| BA 1234567801 | A3KP2M | BABA0117 | LHR→JFK | 2.06.2026 | Economy | 1730.0 | 1730.0 |
| BA 1234567802 | B7LQ9R | BABA0544 | LHR→DXB | 3.06.2026 | Economy | 540.2 | 540.2 |
| EZ 9876543201 | C2MT4X | EZEZY8821 | LGW→BCN | 3.06.2026 | Economy | 148.3 | 148.3 |
| FR 5432198701 | D5NV6Y | FRFR1234 | STN→MAD | 4.06.2026 | Economy | 162.7 | 162.7 |
| BA 1234567805 | E9PW1Z | BABA0252 | LHR→LAX | 5.06.2026 | Economy | 2180.5 | 2180.5 |
| VS 7654321001 | F1QX3A | VSVS0401 | LHR→SYD | 5.06.2026 | Economy | 3210.8 | 3210.8 |
Flight distance, cabin class, hotel star rating and country-based emissions — IATA & ICAO certified, AI-powered.
The format of your Excel file is entirely up to you. Different column names? Mixed rows? Some fields empty? No problem — our AI recognizes your data and automatically fills in missing CO₂ and distance values.
| From | To | Distance | CO₂ (kg) |
|---|---|---|---|
| LHR | JFK | 5,540 km | 1,730 kg |
| LHR | DXB | 5,480 km | 540 kg |
| LGW | BCN | ⚡ Flight distance | ⚡ CO₂ emission value |
| STN | MAD | ⚡ Flight distance | ⚡ CO₂ emission value |
| LHR | SYD | 16,990 km | 3,210 kg |
Calculate the real flight distance between two airports in km and miles using the IATA Great-Circle method.
Calculate per-person CO₂ emissions based on aircraft type, load factor, and cabin class using ICAO standards.
Calculate nightly CO₂ emissions per person based on the hotel's star rating and country.
See the CO₂ difference between a 5-star and 3-star hotel, and how the same category varies by country.
Get a clean Excel output ready to import directly into your own software or systems.
Upload your own Excel freely thanks to AI — no format adjustment needed.
Query flight and hotel CO₂ directly from your systems via REST API. No Excel upload needed — get IATA & ICAO compliant results instantly with a single request.
// One request — instant CO₂ result const res = await fetch( "https://api.calco2ai.com/v1/emissions", { method: "POST", headers: { Authorization: "Bearer ${API_KEY}" }, body: JSON.stringify( { from: "IST", to: "LHR", cabin: "economy" } ) } ); const { co2_kg } = await res.json();
{"co2_kg": 187.42,
"standard": "ICAO",
"distance_km": 2501}Upload your flight data containing PNR and/or ticket numbers in your own Excel format. No fixed template required.
Our AI automatically recognises and interprets the data in your Excel, then completes the distance and CO₂ emission calculations for every row.
Results are returned as an enriched Excel file — your original PNR and ticket numbers intact, with distance and CO₂ columns added.
Import the downloaded report into your own software, use it in your accounting or reporting system, or work with the Excel however you like.
CO₂ values calculated using ICAO methodology. Economy seat, one way, one passenger.
| Route | Distance | CO₂ / Person (Economy) | CO₂ / Person (Business) | Impact |
|---|---|---|---|---|
| London (LHR) → New York | 5,540 km | 1,730 kg | 3,730 kg | High |
| London (LHR) → Dubai | 5,480 km | 540 kg | 1,160 kg | Medium |
| London (LHR) → Sydney | 16,990 km | 3,210 kg | 6,910 kg | High |
| London (LGW) → Barcelona | 1,390 km | 148 kg | 318 kg | Low |
| London (STN) → Madrid | 1,460 km | 163 kg | 350 kg | Low |
| London (LHR) → Los Angeles | 8,760 km | 2,180 kg | 4,690 kg | High |
| London (LHR) → Singapore | 10,840 km | 2,060 kg | 4,430 kg | High |
The higher the star rating, the more energy consumed — and there are big differences country to country.
| PNR | HOTEL | COUNTRY | CHECK-IN | NIGHTS | ROOMS | STARS | CATEGORY | CO₂/ROOM |
|---|---|---|---|---|---|---|---|---|
| 10201 | A HOTEL | GBR | 14.01.2026 | 3 | 1 | ★★★★★ | Upper Upscale (5★) | 52.3 |
| 10202 | B HOTEL | GBR | 09.02.2026 | 2 | 1 | ★★★★ | Upscale (4★) | 36 |
| 10203 | C HOTEL | GLO ~est. | 02.02.2026 | 1 | 2 | ★★★ | Upper Midscale (3★) | 27.8 |
| 10204 | D HOTEL | GLO ~est. | 03.02.2026 | 4 | 1 | ★★★★ | Upscale (4★) | 36 |
| 10205 | E HOTEL | USA | 04.02.2026 | 2 | 1 | ★★★★★ | Luxury / Palace (5★+) | 68.7 |
| 10206 | F HOTEL | GLO ~est. | 30.01.2026 | 1 | 1 | ★★ | Economy/Budget (1-2★) | 14.7 |
Formulations accepted by IATA and ICAO are used. This ensures that values are calculated to industry-accepted standards, down to the deviations.
Only the content matters in your Excel — we have no template requirement. We show our magic here: we understand the content and set everything up for you.
We serve both. Today, corporations have a great need for CO₂ emission reports. This is driven both by demands from ministries and by corporate policies.
In the UK, DESNZ enforces SECR for large companies and the UK ETS Authority runs the Emissions Trading System. In the USA, the EPA mandates GHGRP for facilities emitting ≥25,000 t CO₂e/yr, and the SEC requires climate disclosures for public companies. See our Compliance page for full details.
Formulations accepted by IATA and ICAO are used. This ensures that values are calculated to industry-accepted standards, down to the deviations.
Only the content matters in your Excel — we have no template requirement. We show our magic here: we understand the content and set everything up for you.
We serve both. Today, corporations have a great need for CO₂ emission reports. This is driven both by demands from ministries and by corporate policies.
In the UK, DESNZ enforces SECR for large companies and the UK ETS Authority runs the Emissions Trading System. In the USA, the EPA mandates GHGRP for facilities emitting ≥25,000 t CO₂e/yr, and the SEC requires climate disclosures for public companies. See our Compliance page for full details.
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