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Power Converter: Convert Watt, Kilowatt and More

This free power converter converts 8 units, including watt, kilowatt and megawatt. Type a value, choose the units and read the answer, plus the value in every other unit.

By Debmedia Technologies LLP · Kolkata, India · Updated

What Is It and When Do You Need It?

Power is the rate at which energy is used or produced. Engines are rated in horsepower or kilowatts, appliances in watts, and air conditioners in BTU per hour or tons of refrigeration.

This converter handles 8 units for watt and shows the result in all of them at once, so you rarely need a second lookup.

How to Use This Tool

  1. Type the value you want to convert.
  2. Choose the unit you have in the From list.
  3. Choose the unit you want in the To list.
  4. Press Convert and read the answer and the table of every unit.

How the Calculation Works

Every unit is stored as a multiple of one reference unit (the watt). To convert, the value is multiplied into the reference unit and then divided by the size of the target unit. All factors are exact or taken from standard definitions, and results show up to ten significant digits.

Worked Example

You enterYou get
1 W0.001 kW
10 W1e-05 MW
100 kW100000 W

Reference values:

FromTo
1 Watt0.001 kW
1 Watt1e-06 MW
1 Watt0.0013410221 hp
1 Watt0.0013596216 PS
1 Watt3.4121416 BTU/h
1 Watt0.00028434514 TR
1 Watt0.73756215 ft·lb/s

Common Uses

  • Comparing car and motorbike engine ratings.
  • Sizing air conditioners and heaters.
  • Checking appliance and generator ratings.
  • Electrical and engineering calculations.

Tips and Common Mistakes

  • One mechanical horsepower is about 745.7 watts.
  • One kilowatt equals about 1.341 horsepower.
  • Use the table under the answer to see the same value in every unit.

Next, you may need the force converter, torque converter, angle converter, data storage converter.

Everything runs in your browser. Nothing you type is uploaded, stored or sent to any outside service.

Frequently Asked Questions

Choose watt in the From list and kilowatt in the To list, type your value and press Convert. For example 1 W equals 0.001 kW.
It uses the exact or standard definitions of each unit and shows up to ten significant digits. It is suitable for school, cooking, travel, engineering estimates and general use.
Yes. Decimals, commas and scientific notation such as 1.5e6 are accepted. Very large and very small results are shown in scientific notation.
No. The conversion runs in your browser and nothing is sent to us.

Disclaimer: results are calculated in your browser from the numbers you enter. Check important results before you rely on them for money, health, safety or legal decisions.