Power Converter — Watt & Electrical Unit Conversion

Rates of work and heat flow: motors, chargers, furnaces, and grid-scale plants—not the same as energy totals.

From:

To:

0.000000

Conversion Result

1 Watt = 0.000000 Kilowatt

1 Watt = 0.001000 Kilowatt

Power mix-ups (read before you paste into a spec)

kW vs kW·h: watts and kilowatts are rates. Utility bills care about kilowatt-hours—see the energy converter when you need totals.
Horsepower branding: marketing “hp” on appliances may not match the mechanical definition used here—always trace the datasheet.
BTU/h vs BTU: BTU per hour is a power; a plain BTU is an energy chunk—do not swap them in formulas.

Conversions normalize through Watt across 5 units.

Who actually quotes power in these units?

Electrical: watts and kilowatts on chargers, breakers, solar inverters, and utility-scale MW.
Mobility: mechanical horsepower for legacy ICE marketing; EV drivetrains and chargers stay in kW.
HVAC: BTU/h (and nominal “tons”) for North American residential equipment sizing conversations.

Mental anchors

A typical microwave might run near 1 kW while heating; a Level-2 EV charger is often 7–11 kW nameplate; 1 hp ≈ 746 W for quick mental checks against the exact 745.7 W factor in the table.

Power questions worth answering once

Is the horsepower in this tool the same as “metric horsepower” (PS) on European car brochures?

This converter uses mechanical horsepower ≈ 745.7 W, common in US automotive and many engineering tables. Metric horsepower (PS, cheval vapeur) is about 735.5 W—close enough for casual chat, wrong for spec sheets. When in doubt, work in watts.

How are BTU per hour and air-conditioning “tons” related?

Residential HVAC in the US still quotes equipment in BTU/h or nominal tons of refrigeration. One ton of cooling is traditionally about 12,000 BTU/h (derived from ice-melting history). Use BTU/h here for cross-checking datasheets, not for guessing duct design without a Manual J.

Why does my EV charger show kW while my bill talks about kWh?

The charger label is power—how fast energy flows. The utility cares about energy delivered over time (power × hours). Multiply kW by hours plugged in (and efficiency) to reason about kWh; this page converts power units only—pair it with the energy converter when totals matter.

Calculate time differences and durations

Try tool →

Looking for something else?

Browse all tools