Fidamen

Convert Watts to Gigawatts - Power Converter

This tool converts a single numeric power value between kilowatts and gigawatts using the exact SI relationship. It is intended for quick engineering, reporting, and educational use when a single scalar conversion is required.

The converter follows the fixed mathematical ratio between units and provides guidance on rounding, significant figures, and regulatory-relevant considerations to help you report results appropriately in technical or compliance contexts.

Updated Nov 26, 2025QA PASS — golden 25 / edge 120Run golden-edge-2026-01-23

Governance

Record 48755f90924f • Reviewed by Fidamen Standards Committee

Interactive Converter

Convert between kilowatt and gigawatt with precision rounding.

Quick reference table

KilowattGigawatt
1 kW0 GW
5 kW0 GW
10 kW0 GW
25 kW0 GW
50 kW0 GW
100 kW0 GW

Methodology

Conversion is a fixed base-10 scaling based on SI definitions. The relationship used is exact and independent of measurement method: 1 gigawatt equals one million kilowatts.

For computational accuracy the converter uses standard floating-point arithmetic for intermediate calculations. For final reporting, choose rounding and significant figures that reflect the measurement device tolerance and applicable standards.

When using converted values in regulated documents or safety calculations, follow measurement and reporting conventions from national and international standards bodies to ensure compliance.

Key takeaways

This converter applies the exact SI scale factor between kilowatts and gigawatts. Use the simple multiplication factors shown and apply rounding that reflects measurement uncertainty.

For energy quantities expressed in kilowatt-hours or gigawatt-hours use an energy converter instead; this tool is for instantaneous power units only.

Worked examples

Convert 500000 kW to GW: 500000 × 1e-6 = 0.5 GW.

Convert 12345 kW to GW: 12345 × 1e-6 = 0.012345 GW. Round as required by reporting tolerance.

Convert 200 GW to kW: 200 × 1e6 = 200000000 kW.

F.A.Q.

Is this conversion exact or approximate?

The mathematical scaling between kilowatts and gigawatts is exact: 1 GW equals 1,000,000 kW. Any approximation arises only from numeric rounding when formatting results for display.

Should I convert kilowatt-hours to gigawatt-hours with this tool?

No. Kilowatt-hour and gigawatt-hour are energy units and require the same numeric scale factor but represent energy, not instantaneous power. Use an energy converter labeled for kilowatt-hour to gigawatt-hour to avoid context errors.

How many decimal places should I show?

Match decimal places to the measurement uncertainty and the audience. For instrumentation-level data, follow significant-figure conventions recommended by national metrology guidelines. For high-level reporting, 2 or 3 significant digits are common unless standards require otherwise.

Are there safety or regulatory considerations when converting power units?

Unit conversion itself does not change hazard. When conversions feed safety calculations or permit documents, apply relevant electrical safety standards and workplace regulations to the underlying measurement and to any protective measures.

Can floating-point rounding introduce errors for very large or very small values?

Floating-point arithmetic can introduce minimal rounding error at extreme magnitudes. For typical engineering ranges this is negligible. If you require guaranteed integer-scale exactness for very large integers, use arbitrary-precision arithmetic or integer scaling before display.

Sources & citations

Further resources

Versioning & Change Control

Audit record (versions, QA runs, reviewer sign-off, and evidence).

Record ID: 48755f90924f

What changed (latest)

v1.0.0 • 2025-11-26 • MINOR

Initial publication and governance baseline.

Why: Published with reviewed formulas, unit definitions, and UX controls.

Public QA status

PASS — golden 25 + edge 120

Last run: 2026-01-23 • Run: golden-edge-2026-01-23

Engine

v1.0.0

Data

Baseline (no external datasets)

Content

v1.0.0

UI

v1.0.0

Governance

Last updated: Nov 26, 2025

Reviewed by: Fidamen Standards Committee (Review board)

Credentials: Internal QA

Risk level: low

Reviewer profile (entity)

Fidamen Standards Committee

Review board

Internal QA

Entity ID: https://fidamen.com/reviewers/fidamen-standards-committee#person

Semantic versioning

  • MAJOR: Calculation outputs can change for the same inputs (formula, rounding policy, assumptions).
  • MINOR: New features or fields that do not change existing outputs for the same inputs.
  • PATCH: Bug fixes, copy edits, or accessibility changes that do not change intended outputs except for previously incorrect cases.

Review protocol

  • Verify formulas and unit definitions against primary standards or datasets.
  • Run golden-case regression suite and edge-case suite.
  • Record reviewer sign-off with credentials and scope.
  • Document assumptions, limitations, and jurisdiction applicability.

Assumptions & limitations

  • Uses exact unit definitions from the Fidamen conversion library.
  • Internal calculations use double precision; display rounding follows the unit's configured decimal places.
  • Not a substitute for calibrated instruments in regulated contexts.
  • Jurisdiction-specific rules may require official guidance.

Change log

v1.0.0 • 2025-11-26 • MINOR

Initial publication and governance baseline.

Why: Published with reviewed formulas, unit definitions, and UX controls.

Areas: engine, content, ui • Reviewer: Fidamen Standards Committee • Entry ID: 6bed03d45f6d