Matching your electricity use with renewable certificates is the standard way to drive market-based Scope 2 emissions toward zero — but the cost depends entirely on volume and the certificate price. This calculator converts your MWh consumption and a per-MWh price into a total procurement cost and the resulting emission factor.
How it works
Certificates are denominated per megawatt-hour, so the math is direct:
certificates needed = annual consumption (MWh) (1 cert = 1 MWh)
total cost = certificates × price per MWh
match % = certificates bought / consumption × 100
market-based Scope 2 = consumption × certificate emission factor (≈ 0 for renewables)Matching 100 percent of consumption with retired renewable certificates reports a market-based Scope 2 of roughly zero, while your location-based figure (the grid average) is unaffected.
Notes and tips
The headline cost is simply volume times price, but two things deserve care. First, certificate prices vary enormously by market and vintage — bulk EU GOs can cost a fraction of a euro per MWh, while premium recent-vintage or country-matched instruments cost far more, so use a live quote. Second, unbundled certificates move your reported Scope 2 but add little real-world generation; if impact matters more than the report, a bundled power purchase agreement tied to a new project delivers stronger additionality for a similar or better long-run cost.