Emission Reduction Calculator Formula
Understand the math behind the emission reduction calculator. Each variable explained with a worked example.
Formulas Used
Reduction Achieved
reduction_pct = pct_reductionAbsolute Reduction
abs_reduction = absolute_reductionRemaining to Target
still_needed = remaining_to_targetTarget Reduction %
target_pct = (baseline_tons - target_tons) / baseline_tons * 100Variables
| Variable | Description | Default |
|---|---|---|
baseline_tons | Baseline Annual Emissions(metric tons CO2e) | 500 |
current_tons | Current Annual Emissions(metric tons CO2e) | 350 |
target_tons | Target Emissions(metric tons CO2e) | 250 |
absolute_reduction | Derived value= baseline_tons - current_tons | calculated |
pct_reduction | Derived value= (baseline_tons - current_tons) / baseline_tons * 100 | calculated |
remaining_to_target | Derived value= current_tons - target_tons | calculated |
How It Works
How to Calculate Emission Reductions
Tracking emission reductions helps measure progress toward climate goals.
Formula
Reduction % = (Baseline - Current) / Baseline * 100
Absolute Reduction = Baseline - Current
Baseline is typically a reference year (e.g., 2019) against which progress is measured. Targets are often set as percentage reductions from that baseline.
Worked Example
A company had 500 tons CO2e baseline, currently emits 350 tons, targeting 250 tons.
baseline_tons = 500current_tons = 350target_tons = 250
- 01Absolute reduction: 500 - 350 = 150 metric tons CO2e
- 02Reduction achieved: 150 / 500 * 100 = 30%
- 03Remaining to target: 350 - 250 = 100 metric tons CO2e
- 04Target reduction: (500 - 250) / 500 * 100 = 50%
Ready to run the numbers?
Open Emission Reduction Calculator