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Articles on BTU, watts, HVAC sizing, and the math behind energy unit conversions.
Choose the guide that matches your task
Start with the unit-concept articles if you need to distinguish energy from power. Use a formula guide when you already know the time basis, the air-conditioner guide when capacity and electricity use are being compared, or the chart for a quick lookup. Each article states where a mathematical conversion ends and equipment-specific data begins.
Articles
Conversion basics
How Many BTU Is One Watt?
Learn why one watt equals 3.412142 BTU/hr and how power differs from energy.
Heating applications
How Many BTU Is 1,500 Watts?
Convert 1,500 watts to BTU/hr and understand heater output, energy cost, amperage, room conditions, and safety.
Cooling applications
BTU to Watts for Air Conditioners
Understand AC cooling capacity, electrical input, efficiency ratings, running watts, and startup surge.
Concepts and units
BTU vs Watts: What's the Real Difference?
Both measure energy but answer different questions. The 3.412 ratio in plain English.
Conversion method
How to Convert BTU to Watts (Formula + Worked Examples)
Divide BTU/h by 3.412. Step-by-step worked examples, mental-math shortcuts, and label-reading mistakes.
Conversion method
How to Convert Watts to BTU (Formula + Examples)
Multiply watts by 3.412. Examples for heaters, ACs, computers, and heat pumps.
Reference charts
BTU to Watts Chart: Quick Reference Tables
Conversion tables for AC sizing, heat pumps, gas appliances, and solar setups.
Coverage and editorial standards
These guides separate energy from power, thermal capacity from electrical consumption, and fixed unit relationships from estimates that depend on real equipment. Formula articles show the calculation; application articles explain when manufacturer ratings, operating conditions, efficiency metrics, or professional load calculations are still required.
Constants and unit conventions are tied to the site’s calculator methodology. If an article conflicts with a current product specification, code, or tariff, use the authoritative document and report the discrepancy through the contact page.