About BTU to Watts

BTU to Watts exists to make one narrow problem dead simple: converting between thermal and electrical power units with enough accuracy for engineering work and enough clarity for a curious homeowner. The calculator runs instantly in the browser, with no tracking, no sign-up, and no limits.

A live, two-way converter covering BTU/hr, watts, kilowatts, megawatts, tons of refrigeration, mechanical horsepower, kilocalories per hour, and kVA (with power factor). Every conversion uses the internationally-standardized factor 1 BTU/hr = 0.29307107 W, so results match what you would compute by hand.

Each pair has its own page with a dedicated calculator, interactive scale diagram, formula derivation, worked example, reference table, real-world use cases, and FAQ. The home page adds a live particle visualization, a power-explorer slider, a unit-parity ruler, and a room-sizing tool for HVAC applications.

• HVAC contractors cross-referencing BTU/hr to kW on European specs.
• Electrical engineers sizing UPS and generator cooling from kVA loads.
• Students solving thermodynamics problems.
• Homeowners comparing AC units across imperial and metric labels.
• Data-center operators translating IT load to cooling capacity.

Results are for estimation and education. For code-compliant sizing, safety-critical installations, or legal documentation, verify against manufacturer specifications and consult a licensed professional. Read the full Terms & Conditions for details.