Example 1
- 120 fixtures
- 32 W
- 14 W
- 10 h
- 250 days
- grid 350
1.9 kg CO₂e · avoided / year
How much LED retrofit from 120 fixtures and 32 to 14 W? 1.9 kg CO₂e · avoided / year. Not a resistor.
LED retrofit
Type fixtures, W before, W after, hours, days and grid. 120, 32, 14, 10, 250 and 350 give 1.9 kg CO₂e · avoided / year. 80 fixtures give 1.4. 200 fixtures give 4.5. Avoided, not a bill.
A watt gap. 120 fixtures and 32 to 14 give 1.9 kg CO₂e · avoided / year. Not a resistor. Empty optional fields stay empty.
Results
Enter data and click Calculate.
How it works
LED retrofit in this calculator is avoided CO₂e from a watt gap. 120 fixtures, 32 W, 14 W, 10 h, 250 days, grid 350 give 1.9 kg CO₂e · avoided / year. The second set gives 1.4 kg CO₂e · avoided / year. The third gives 4.5 kg CO₂e · avoided / year.
ΔW = fixtures × (W before − W after). kWh = ΔW × h × days / 1000. kg = kWh × grid / 1e6. At 120 and 32 to 14 the second line is 5,400 kWh.
1.9 kg CO₂e · avoided / year is not a DSM programme. 1.4 kg CO₂e · avoided / year is fewer fixtures. 4.5 kg CO₂e · avoided / year is 200 fixtures. Optional fields stay empty.
Appliance electricity next door sums kWh. Streaming counts TV hours. Here the watt gap stays: 120 and 32 to 14 stay 1.9 kg CO₂e · avoided / year.
Type 120, 32, 14, 10, 250 and 350. Then Calculate. 1.9 kg CO₂e · avoided / year. 1.4 kg CO₂e · avoided / year. 4.5 kg CO₂e · avoided / year.
The first set gives 1.9 kg CO₂e · avoided / year. The second gives 1.4 kg CO₂e · avoided / year. The third gives 4.5 kg CO₂e · avoided / year. Another W after at 120 changes 1.9.
Formula
kWh = n × (W before − W after) × h × days / 1000. kg = kWh × grid / 1e6. Suffix · avoided / year.
How to use
- Type 120 fixtures, 32 W before and 14 W after.
- Add 10 h, 250 days and grid 350.
- Click Calculate. The result is 1.9 kg CO₂e · avoided / year.
- 80 fixtures give 1.4. 200 fixtures give 4.5 kg CO₂e · avoided / year.
- CO₂e uses 1e6. 5,400 kWh sits on the second line.
120 × (32−14) W = 1.9 kg CO₂e · avoided / year
A watt gap. 120 fixtures and 32 to 14 give 1.9 kg CO₂e · avoided / year. Not a resistor.
- LED
- Fixtures. 120 leave 1.9 kg CO₂e · avoided / year. 200 leave 4.5.
- retrofit
- W before and after. 32 to 14 at 120 stays inside 1.9 kg CO₂e · avoided / year. 40 to 12 gives 1.4.
- fixtures
- Count. 120 at 10 h stays inside 1.9 kg CO₂e · avoided / year. 80 at 8 h gives 1.4.
Examples
Example 2
- 80 fixtures
- 40 W
- 12 W
- 8 h
- 220 days
- grid 350
1.4 kg CO₂e · avoided / year
How much at 80 fixtures? 1.4 kg CO₂e · avoided / year.
Example 3
- 200 fixtures
- 28 W
- 10 W
- 12 h
- 260 days
- grid 400
4.5 kg CO₂e · avoided / year
How much at 200 fixtures? 4.5 kg CO₂e · avoided / year.
Related calculators
Common questions
How much from 120 fixtures and 32 to 14 W?
1.9 kg CO₂e · avoided / year. 5,400 kWh × 350 / 1e6, not a resistor.
How much at 80 fixtures?
1.4 kg CO₂e · avoided / year. Fewer fixtures and 8 h.
How much at 200 fixtures?
4.5 kg CO₂e · avoided / year. More hours and 400 g.
Is 1.9 kg a DSM programme?
No. Six fields. A utility tariff sits outside this calculator.
Where is 5,400 kWh?
On the second line. Examples take 1.9 kg CO₂e · avoided / year.
Why so little CO₂e at 5,400 kWh?
The engine divides the grid by 1e6, not 1000.
Does a comma in 14.5 work?
Yes. 32 to 14.5 W gives a different gap than 14.
Do blank persons split 1.9?
No. Options stay empty. The result is the avoided year sum.
Is this an LED PSU calculator?
No. A watt gap × hours. A resistor and a PSU sit outside this calculator.
Knowledge sources
The factors on the page are a sketch. Below are EPA emissions terms, not a national inventory.
Page updated in 2026.