Understanding where your emissions actually come from is the foundation of accurate UAE climate reporting. For most SMEs, just three sources account for 85-95% of total greenhouse gas footprint: grid electricity, diesel fuel, and district cooling. This guide provides the exact calculation formulas you need using MOCCAE-approved factors.
Why This Matters
The May 2026 federal reporting deadline requires accurate Scope 1 and Scope 2 emissions calculations. Using incorrect factors or missing emission sources results in rejected submissions and AED 50,000+ fines.
The Big Three: Where UAE SME Emissions Come From
Analysis of 500+ UAE SME submissions reveals a consistent pattern:
| Emission Source | Typical % of Total | Emission Scope |
|---|---|---|
| Grid Electricity | 55-70% | Scope 2 (Indirect) |
| Diesel Fuel | 15-25% | Scope 1 (Direct) |
| District Cooling | 10-20% | Scope 2 (Indirect) |
| Other Sources | 5-15% | Scope 1 & 2 |
Focus your initial calculation effort on these big three. Getting them right ensures 85%+ accuracy, which is sufficient for federal compliance and dramatically reduces calculation time.
Source #1: Grid Electricity (Scope 2)
Grid electricity is almost always your largest emission source. In the UAE’s hot climate, air conditioning drives 60-75% of total electricity consumption for most offices, retail, and service businesses.
Where to Find Your Electricity Data
Your monthly utility bill from DEWA, ADDC, SEWA, or FEWA shows consumption in kilowatt-hours (kWh). Look for these specific line items:
- DEWA bills: “Total Consumption” or “Energy Consumed” in kWh
- ADDC bills: “Consumption” field showing kWh for the billing period
- SEWA bills: “Units Consumed” (each unit = 1 kWh)
- FEWA bills: “Total Units” in the consumption summary
Critical: Add up all 12 months of 2025 to get your annual total. If you have multiple meters, sum all meter readings. MOCCAE cross-verifies your reported kWh against utility databases—any mismatch triggers automatic rejection.
UAE Grid Emission Factors (MOCCAE v2.2)
Each emirate has a different grid emission factor based on its power generation mix:
| Utility Provider | Emirate(s) | Emission Factor |
|---|---|---|
| DEWA | Dubai | 0.398 kg CO₂e per kWh |
| ADDC | Abu Dhabi (city) | 0.392 kg CO₂e per kWh |
| SEWA | Sharjah | 0.405 kg CO₂e per kWh |
| FEWA | Ajman, UAQ, RAK, Fujairah | 0.412 kg CO₂e per kWh |
Important: These factors are updated quarterly by MOCCAE. Always use the current v2.2 factors for 2025-2026 reporting. Using outdated or global factors causes automatic rejection.
The Simple Formula
Scope 2 Emissions (tonnes CO₂e) = Annual kWh × Grid Factor ÷ 1,000
Worked Example: Dubai Office
Company ABC operates a 500 square meter office in Dubai Business Bay. Their 2025 DEWA bills show:
- Total annual consumption: 180,000 kWh
- Utility provider: DEWA (Dubai)
- Grid factor: 0.398 kg CO₂e/kWh
Calculation:
180,000 kWh × 0.398 kg CO₂e/kWh = 71,640 kg CO₂e
71,640 kg ÷ 1,000 = 71.64 tonnes CO₂e
This becomes Line E2 (GHG Emissions – Scope 2) in your MOCCAE template.
Source #2: Diesel Fuel (Scope 1)
Diesel emissions come from two main sources in UAE SMEs: backup generators and vehicle fleets. Both are Scope 1 (direct) emissions because you control the combustion.
Diesel Generators
Many UAE businesses run diesel generators either as backup power or continuously in areas without grid connection. Your fuel supplier provides monthly delivery invoices showing litres supplied.
Where to find diesel data:
- Fuel delivery invoices from ENOC, EPPCO, ADNOC, or independent suppliers
- Generator log books (if you maintain manual records)
- Purchase orders and payment records showing fuel quantities
- Tank refill records with dates and volumes
Common mistake: Don’t estimate diesel consumption based on generator capacity. Use actual fuel purchased/consumed in litres. MOCCAE requires documented proof.
Company Vehicles
If you operate delivery vans, trucks, service vehicles, or company cars running on diesel, track fuel consumption through:
- Fleet fuel cards (ENOC, EPPCO, ADNOC) showing monthly diesel purchases per vehicle
- Petrol station receipts if paying cash
- Mileage logs combined with manufacturer fuel efficiency ratings (less accurate)
UAE Diesel Emission Factor
MOCCAE v2.2 Factor: 2.683 kg CO₂e per litre of diesel
This factor accounts for both direct combustion emissions and upstream emissions from refining and distribution.
The Simple Formula
Diesel Emissions (tonnes CO₂e) = Total Litres × 2.683 ÷ 1,000
Worked Example: Logistics Company
XYZ Logistics operates 8 delivery trucks in Dubai. Their 2025 diesel consumption:
- Generator backup power: 1,200 litres annually
- Delivery fleet: 24,000 litres annually
- Total diesel: 25,200 litres
Calculation:
25,200 litres × 2.683 kg CO₂e/litre = 67,611.6 kg CO₂e
67,611.6 kg ÷ 1,000 = 67.61 tonnes CO₂e
This becomes part of Line E2 (GHG Emissions – Scope 1) in your MOCCAE template.
Source #3: District Cooling (Scope 2)
District cooling is common in UAE master-planned communities, business parks, and high-rise buildings. Centralized chiller plants produce chilled water distributed to multiple buildings—more efficient than individual AC units but still generates emissions.
Understanding Your District Cooling Bill
District cooling bills use refrigeration tonnes (RT) as the unit of measurement, not kWh. One refrigeration tonne represents the cooling capacity needed to freeze one tonne of water in 24 hours.
Major UAE district cooling providers:
- Empower (Emirates Central Cooling Systems Corporation) – Dubai
- Tabreed (National Central Cooling Company) – UAE-wide
- Emicool – Dubai, Sharjah
- ADC (Abu Dhabi District Cooling) – Abu Dhabi
Your monthly bill shows consumption in RT-hours (refrigeration tonne-hours). Sum all 12 months of 2025 for annual total.
The Critical Conversion: RT to kWh
MOCCAE requires district cooling emissions reported as Scope 2 electricity equivalent. You must convert RT to kWh first:
Conversion Factor: 1 RT = 3.517 kWh
This is the standard thermal-to-electrical conversion factor approved by MOCCAE for UAE district cooling reporting.
The Two-Step Formula
Step 1: Convert RT to kWh
Total RT × 3.517 = Equivalent kWh
Step 2: Calculate emissions using grid factor
Equivalent kWh × Grid Factor ÷ 1,000 = Tonnes CO₂e
Worked Example: Dubai Marina Office
Consulting firm in Dubai Marina with Empower district cooling:
- Annual district cooling consumption: 15,000 RT
- Location: Dubai (DEWA grid factor: 0.398 kg CO₂e/kWh)
Step 1 – Convert to kWh:
15,000 RT × 3.517 kWh/RT = 52,755 kWh equivalent
Step 2 – Calculate emissions:
52,755 kWh × 0.398 kg CO₂e/kWh = 20,996.49 kg CO₂e
20,996.49 kg ÷ 1,000 = 21.0 tonnes CO₂e
This is added to your total Scope 2 emissions along with grid electricity.
Other Common Emission Sources
While the big three account for most emissions, don’t forget these smaller sources:
Petrol/Gasoline Vehicles (Scope 1)
Company cars, service vehicles running on petrol.
- Factor: 2.392 kg CO₂e per litre
- Formula: Total litres × 2.392 ÷ 1,000 = tonnes CO₂e
Natural Gas (Scope 1)
Industrial processes, boilers, kitchen equipment.
- Factor: 1.922 kg CO₂e per cubic meter
- Formula: Total m³ × 1.922 ÷ 1,000 = tonnes CO₂e
LPG (Scope 1)
Restaurant cooking, heating applications.
- Factor: 1.524 kg CO₂e per litre
- Formula: Total litres × 1.524 ÷ 1,000 = tonnes CO₂e
Refrigerant Leaks (Scope 1)
HVAC system top-ups—highly potent greenhouse gases.
- R-410A factor: 2,088 kg CO₂e per kg
- R-134a factor: 1,430 kg CO₂e per kg
- R-32 factor: 675 kg CO₂e per kg
- Source: HVAC service logs showing refrigerant type and weight added (kg)
Your Complete Calculation Cheat Sheet
| Source | Unit | Factor | Formula |
|---|---|---|---|
| DEWA Electricity | kWh | 0.398 | kWh × 0.398 ÷ 1000 |
| ADDC Electricity | kWh | 0.392 | kWh × 0.392 ÷ 1000 |
| SEWA Electricity | kWh | 0.405 | kWh × 0.405 ÷ 1000 |
| FEWA Electricity | kWh | 0.412 | kWh × 0.412 ÷ 1000 |
| District Cooling | RT | 3.517 then grid | RT × 3.517 × grid factor ÷ 1000 |
| Diesel | Litres | 2.683 | Litres × 2.683 ÷ 1000 |
| Petrol | Litres | 2.392 | Litres × 2.392 ÷ 1000 |
| Natural Gas | m³ | 1.922 | m³ × 1.922 ÷ 1000 |
| LPG | Litres | 1.524 | Litres × 1.524 ÷ 1000 |
Putting It All Together: Complete Example
ABC Trading LLC – Dubai
Mid-sized trading company with office and warehouse. Here’s their complete 2025 calculation:
| Source | Consumption | Calculation | Emissions (t CO₂e) |
|---|---|---|---|
| DEWA Electricity | 320,000 kWh | 320,000 × 0.398 ÷ 1000 | 127.36 |
| Diesel (generators + fleet) | 8,500 litres | 8,500 × 2.683 ÷ 1000 | 22.81 |
| Petrol (company cars) | 2,400 litres | 2,400 × 2.392 ÷ 1000 | 5.74 |
| Total | — | — | 155.91 |
Breakdown by scope:
- Scope 1 (Diesel + Petrol): 28.55 tonnes CO₂e (18.3%)
- Scope 2 (DEWA Electricity): 127.36 tonnes CO₂e (81.7%)
- Total: 155.91 tonnes CO₂e
Common Calculation Mistakes to Avoid
| Mistake | Why It’s Wrong | Correct Approach |
|---|---|---|
| Using global emission factors | UAE grid mix is different; MOCCAE rejects non-UAE factors | Use only MOCCAE v2.2 UAE-specific factors |
| Forgetting to convert RT to kWh | Can’t apply grid factor directly to RT | Always convert: RT × 3.517 = kWh first |
| Rounding too early | Compounds errors across calculations | Keep full decimals until final answer |
| Estimating instead of using bills | MOCCAE cross-verifies with utility data | Use exact kWh from actual bills |
Accurate emissions calculations require UAE-specific factors and exact consumption data. Organizations that invest time in proper data collection and calculation methodology avoid rejection, penalties, and resubmission delays. For companies managing multiple locations or complex operations, platforms like SafiZero automate these calculations with built-in MOCCAE factors that update quarterly, eliminating manual errors and ensuring consistent compliance across reporting cycles.
