Free Power Converter - Watts, Kilowatts, Horsepower, BTU Online

A Absolutely. Many heating and cooling systems are rated in BTUs per hour (BTU/h). Our tool lets you convert those values directly into kilowatts (kW) or watts (W). For example, a 24,000 BTU/h air conditioner converts to approximately 7.03 kW. This makes it easy to compare different HVAC units or understand their energy usage.

A Yes, though most people don't realize it. Mechanical horsepower (hp) equals 745.7 watts, but electric horsepower (often used for motors) equals exactly 746 watts. That tiny 0.3-watt difference rarely matters in everyday use. However, if you're writing a technical report for an engineering class or specifying motor specs for industrial equipment, use the precise value. Our tool defaults to mechanical hp, but you can type 746 into the watts field to back-calculate electric hp.

A Absolutely — the tool handles milliwatts (mW) and microwatts (µW) too. A typical Bluetooth headset draws about 100 mW during playback. To convert 500 µW to watts, just type '500 µW' into any input field. The result shows 0.0005 W instantly. This is handy if you're comparing sensor specs or battery drain on tiny IoT devices. No need to search for a separate calculator.

A Yes, always. That's the definition — 1 W = 1 J/s. But here's where people trip up: watts measure instantaneous power, while watt-hours measure total energy over time. Your 100 W light bulb uses 100 joules every second. Leave it on for 10 hours, and you've consumed 1 kWh (3.6 million joules). Our tool handles the conversion instantly. Just don't confuse power with energy; they're different beasts entirely.

A That's actually correct — 1 watt equals about 3.412 BTU/h. Multiply 1500 by 3.412, and you get 5118 BTU/h. Manufacturers often round it to 5120. The conversion is based on physics, not marketing. If your heater claims way more BTU/h than that formula suggests, something's off. Use our tool to verify any heating device's specs. Just pick watts as input, type your number, and click BTU/h.

A Yes, it works with decimals and fractions exactly as you type them. Enter '1.5' in the kW field, and you'll get 1500 W or about 2.01 hp instantly. The tool uses 6 decimal places internally, so a 0.75 hp motor converts to 559.275 W — not some rounded 559 W. This matters when you're sizing a generator for your camper or matching an import motor to local wiring specs. Just paste raw numbers in; the tool won't smooth them out.

A This trips up almost everyone. A kilowatt (kW) measures how fast you're using power at any given moment. A kilowatt-hour (kWh) is the total energy consumed over time — it's what your utility company bills you for. Your oven might draw 3 kW while running, but over a 2-hour baking session, it consumes 6 kWh. On your bill, you're charged per kWh, typically around $0.15–$0.30 depending on your region. Our converter only handles power rates (kW, W, hp), not energy totals. So if you see a device rated in watts, divide by 1000 to get kW, then multiply by hours used to estimate kWh. That math beats guessing when you're budgeting for a new appliance.

A Both are honest, just measured differently. CHP means continuous horsepower, a standard for treadmills that reflects sustained motor output. The 1.9 kW figure is the same power expressed in metric units, since 1 hp equals 0.746 kW. Multiply 2.5 by 0.746 and you get 1.865 kW, which manufacturers round to 1.9. When comparing treadmills, stick to one unit. Use this tool to convert every spec to kW, then judge motors fairly. Ignore peak horsepower numbers; they're marketing fluff.

A Solar panel ratings confuse buyers constantly. A 400-watt panel only produces that peak output under laboratory conditions. Type 400 into the watts field here and convert it to kilowatts to plan your home array. Real weather rarely matches ideal testing standards. You'll usually see about 75 percent of the rated power on a clear afternoon.

A Japanese appliances run on 100V, but power draw is what blows fuses. A 1200W rice cooker pulls the exact same wattage anywhere in the world. Type 1200 into our watts field and convert it to amps using local voltage to check your kitchen circuit. Don't plug high-draw heating elements into weak travel adapters.