kilowatt
MediumTechnical / Semi-technical / Academic
Definition
Meaning
A unit of power equal to one thousand watts, used to measure electrical energy consumption or generation.
A practical unit for measuring significant power output or consumption in electrical systems, appliances, and power generation. Often used in billing and specification contexts.
Linguistics
Semantic Notes
Primarily used as a specific unit of measurement. It is a compound word (kilo + watt) that follows the SI prefix system. Its meaning is precise and literal.
Dialectal Variation
British vs American Usage
Differences
No significant differences in usage or definition. Spelling is identical.
Connotations
Identical connotations in both varieties.
Frequency
Equally common in both technical and general energy-related discussions in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
[Number] + kilowatt(s) + of + [power/electricity]A + [adjective] + kilowatt + [noun]Generate/produce/consume + [number] + kilowattsVocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
Used in utility billing, energy contracts, and power supply negotiations (e.g., 'The rate is 15p per kilowatt-hour').
Academic
Used in physics, engineering, and environmental science papers to quantify power (e.g., 'The turbine has a rated capacity of 2.5 megawatts').
Everyday
Used when discussing home electricity bills, appliance specifications, or solar panel systems (e.g., 'Our new air conditioner uses 1.5 kilowatts').
Technical
A precise unit in electrical engineering, renewable energy design, and power system analysis (e.g., 'The inverter efficiency is 97% at 10 kilowatts').
Examples
By Part of Speech
adjective
British English
- The kilowatt output was impressive.
- We need a kilowatt-hour meter.
American English
- The kilowatt rating is on the label.
- Check the kilowatt capacity.
Examples
By CEFR Level
- A small heater might use one kilowatt.
- Our electricity is measured in kilowatts.
- The new wind turbine can produce up to 100 kilowatts of power.
- My laptop uses less than 0.1 kilowatts.
- The solar panels on our roof have a peak generation capacity of four kilowatts.
- Industrial motors are often rated in hundreds of kilowatts.
- The utility company charges a premium for each peak kilowatt drawn during high-demand periods.
- Advances in semiconductor technology have drastically reduced the kilowatt-per-computation ratio in data centres.
Learning
Memory Aids
Mnemonic
Think of a KILO of watts: just as a kilogram is 1000 grams, a kilowatt is 1000 watts.
Conceptual Metaphor
POWER AS A COMMODITY/FLUID (e.g., 'consuming kilowatts', 'flow of power').
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse 'kilowatt' (киловатт) with 'kilowatt-hour' (киловатт-час), which is a unit of energy, not power.
- The abbreviation 'kW' is standard and identical.
Common Mistakes
- Misspelling as 'killowatt'.
- Using 'kilowatt' when 'kilowatt-hour' is meant (confusing power with energy).
- Incorrect pluralisation: 'kilowatts' is standard.
Practice
Quiz
What does a 'kilowatt' measure?
FAQ
Frequently Asked Questions
A kilowatt (kW) is a unit of power (the rate of energy use). A kilowatt-hour (kWh) is a unit of energy (power used over time). Think of power as speed (kW) and energy as distance travelled (kWh).
In British English: /ˈkɪləwɒt/. In American English: /ˈkɪləwɑːt/. The stress is on the first syllable: KIL-oh-wot.
Yes, it is common in everyday life, especially on electricity bills, appliance labels, and in discussions about home energy use or solar panels.
A typical home's average power demand might range from 0.5 to 2 kilowatts, but it peaks much higher when using appliances like ovens or electric heaters, which can draw 2-10 kilowatts each.