Megawatt Calculator

Convert instantly between watts, kilowatts, megawatts, and gigawatts. The standard scale runs 1 MW = 1,000 kW = 1,000,000 W, and 1 GW = 1,000 MW. Enter any value and the app returns every unit in a single view, eliminating hand-calculation errors in proposals and interconnection paperwork.

Calculate energy from power and time using Energy (MWh) = Power (MW) × Time (hours). Project annual output with the standard formula: Annual Generation = Capacity (MW) × 8,760 hours × Capacity Factor. For example, a 10 MW solar farm at a 22% capacity factor generates about 19,272 MWh per year.

Determine the capacity factor with CF = Actual Energy Output ÷ (Nameplate Capacity × Time in hours). Benchmarks: utility-scale solar typically runs 15–25% (a 10 MW plant at 20% CF produces roughly 17,520 MWh per year), onshore wind runs 25–45%, and offshore wind can exceed 45%. Higher capacity factors directly improve project economics.

Convert between MWh, kWh, GJ, MJ, BTU, and toe. Standard factors: 1 kWh = 3.6 MJ = 3,412 BTU, 1 MWh = 3.6 GJ = 1,000 kWh, and 1 toe = 41.868 GJ. Essential for comparing fuel-based and renewable generation on a common basis in feasibility studies and regulatory filings.

Estimate annual revenue from generation and power price: Revenue = Annual MWh × Price per MWh. Model PPA tariffs, merchant pricing, or feed-in tariffs, and compare scenarios side by side. A 10 MW solar farm producing 19,272 MWh at $50/MWh yields about $963,600 per year in gross revenue.

Generate professional PDF summaries of capacity, generation, capacity factor, energy unit conversions, and revenue projections for clients, lenders, and internal investment committees. Export figures to CSV for integration into financial models. Fully functional offline with no data leaving the device.