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BTU/h to kW Converter – BTU per hour to kilowatts

Quick answer

This calculator converts BTU per hour to kilowatts: 1 BTU per hour = 0.00029307107 kilowatts.

  • Free converter with formula, worked examples and a quick 1–100 table.

Figures are estimates from this calculator’s standard formula — adjust the inputs in the tool below for your exact number.

How the BTU/h to KW Converter Works

kilowatts = BTU per hour × 0.00029307107

This converter applies the exact factor 1 BTU per hour = 0.00029307107 kilowatts. Multiply any value in BTU per hour by 0.00029307107 to get kilowatts: the worked example 12000 BTU/h × 0.00029307107 = 3.52 kW shows the arithmetic in a single line. Watts and kilowatts meter electrical power worldwide, horsepower still sells cars and lawnmowers, and BTU per hour rates heating and cooling — engines, appliances and HVAC meet at this junction. One mechanical horsepower is exactly 745.6998716 W, so car-to-kilowatt comparisons are definition conversions, and 1 kW = 3412.14245 BTU/h closes the HVAC loop. For reverse conversions divide by 0.00029307107 instead — identical to multiplying by 3412.14245 — for example 3.52 kW ≈ 12,011 BTU/h. Quick mini table: 1 BTU/h = 0.000293071 kW; 5 BTU/h = 0.00146536 kW; 10 BTU/h = 0.00293071 kW; 50 BTU/h = 0.0146536 kW; 100 BTU/h = 0.0293071 kW. For feel: a strong kettle draws about 3000 W (≈ 4 hp), a family car peaks near 150 kW (≈ 200 hp), and 9000 BTU/h of cooling is roughly 2.6 kW.

  1. 1

    Step 1

    Enter your value in BTU per hour (BTU/h)

  2. 2

    Step 2

    The converter multiplies it by the exact factor 0.00029307107

  3. 3

    Step 3

    Read the result in kilowatts (kW)

  4. 4

    Step 4

    Hit swap to convert kilowatts back to BTU per hour instantly

Use Cases

Comparing car and motorcycle engine outputs across markets

Sizing generators, inverters and solar installations

Matching electric bike and scooter motor ratings

Tips

  • 1

    Car anchor: 100 kW ≈ 134 hp; 200 hp ≈ 149 kW

  • 2

    kW × 3412.14245 = BTU/h for AC and heater quotes

  • 3

    PS (German spec sheets) = 0.986 hp — nearly equal but not exact

  • 4

    Electric motors quote kW: multiply by 1.34 for US hp comparisons

Common Mistakes

  • Using metric hp (735.49875 W) where mechanical hp (745.6998716 W) applies — a 1.4% drift

  • Reading boiler "input BTU" as output capacity without efficiency losses

  • Quoting PS and hp as if identical on translated spec sheets

FAQs

How many kilowatts are in 1 BTU per hour?

Exactly 0.00029307107 kilowatts — 1 BTU per hour = 0.00029307107 kilowatts. Multiply any BTU per hour figure by 0.00029307107; for instance 12000 BTU/h = 3.52 kW.

Is the factor 0.00029307107 exact?

1 kW = 3412.14245 BTU/h exactly, so 1 BTU/h = 0.00029307107 kW — a 12,000 BTU/h AC is about 3.52 kW.

How do I convert kilowatts back to BTU per hour?

Divide by 0.00029307107, or multiply by the reverse factor 3412.14245 (1 kilowatts = 3412.14245 BTU per hour). Example: 3.52 kW ≈ 12,011 BTU/h. Keeping four decimals of the factor avoids drift on large values.

What is 12000 BTU/h in kilowatts?

12000 × 0.00029307107 = 3.52 kW. The mini table (1/5/10/50/100) in the guide cross-checks this instantly.

Why do European car specs show kW while US specs show hp?

Same power, different convention: multiply kW by 1.3410221 to get mechanical hp. A 150 kW engine is about 201 hp. Metric hp (PS, 735.5 W) sits slightly lower — check which horsepower a spec sheet means. For this BTU per hour–kilowatts pair, that rule frames the anchor 12000 BTU/h = 3.52 kW.