Energy & Sustainability calculator

Renewable Energy Percentage Calculator

Renewable energy percentage supports ESG reporting, procurement tracking, REC planning, and progress against renewable electricity targets. It compares renewable supply with total electricity consumption for the same boundary.

What this calculator does

  • Calculate renewable electricity share from renewable kWh, total electricity use, and a target percentage.
  • an ESG reporting or procurement lead needs renewable electricity share against a target
  • Returns the renewable energy percentage for the selected facility, line, product, project, or reporting boundary.

Formula used

  • Renewable energy percentage = renewable electricity supplied ÷ total electricity consumption × 100
  • Gap to target = renewable electricity target - renewable energy percentage

Inputs explained

  • Renewable electricity supplied: Use on-site generation, green tariff supply, PPAs, or retired REC-backed electricity for the period.
  • Total electricity consumption: Use total site or reporting-boundary electricity consumption for the same period.
  • Renewable electricity target: Enter the target renewable share for the site, product, customer, or reporting year.

How to use the result

  • Use it for energy management, sustainability reporting, utility-cost review, project screening, compliance planning, or operational performance tracking.
  • It does not replace certified emissions inventories, utility tariff analysis, engineering M&V studies, or regulatory reporting review.

Common questions

  • What does the renewable energy percentage calculator tell me? It converts the stated energy, carbon, utility, water, waste, or project assumptions into the renewable energy percentage result shown on the page.
  • Which data should I enter? Use values from utility bills, submeters, emissions-factor tables, production records, supplier data, project estimates, or approved reporting workbooks for the same boundary and period.
  • How should I use the result? Use it to compare projects, support reporting, prioritize audits, update product costing, estimate savings, or prepare a business case before committing resources.
  • When is this only an estimate? Treat it as an estimate until final tariffs, emissions factors, production allocation, metering accuracy, weather or production normalization, and project performance are confirmed.

Last reviewed 2026-05-12.