Kilowatts to Watts (kW to W)

Formula

1 kW = 1000 W

watts = kilowatts × 1000 — reverse: kilowatts = watts × 0.001

The factor is derived from the SI definitions of both units (base unit: W) as listed in NIST SP 811; results on this page are shown to 6 significant figures, the API returns up to 12.

Worked examples

• 5 kW = 5000 W
• 12.5 kW = 12500 W
• 100 kW = 100000 W

Kilowatts to watts conversion table

FAQ

How many watts are in one kilowatt?

1 kW = 1000 W. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.

What is the formula to convert kilowatts to watts?

Multiply the value in kilowatts by 1000: watts = kilowatts × 1000. For example, 5 kW = 5000 W.

How do I convert watts back to kilowatts?

Multiply by the inverse factor 0.001 (kilowatts = watts × 0.001), or use the watts-to-kilowatts page.

Related conversions

• Watts to kilowatts (reverse)
• Power Converter — all power units in one tool
• Horsepower (mechanical) to Kilowatts
• Kilowatts to Horsepower (mechanical)
• BTU per hour to Watts
• Watts to BTU per hour
• Metric horsepower (PS) to Kilowatts
• Kilowatts to Metric horsepower (PS)
• Tons of refrigeration to Kilowatts
• Kilowatts to Tons of refrigeration

Machine access

• API: GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=kW&to_unit=W
• MCP: server https://tttkmbb.com/mcp, tool convert_units with {"value":5,"from_unit":"kW","to_unit":"W"}
• Markdown: https://tttkmbb.com/conversion/kw-to-watts.md · JSON: https://tttkmbb.com/conversion/kw-to-watts.json (add ?value= for a result) · Units: /api/v1/units?quantity=power
• OpenAPI operationId: convert_units. Freshness: static. Authentication: none.

Sources

• NIST Special Publication 811 – Guide for the Use of the International System of Units (SI), Appendix B conversion factors (standard)
• BIPM – The International System of Units (SI Brochure, 9th edition) (standard)
• Wikipedia – Conversion of units (reference)