Fidamen

Convert Kilograms to Carats - Weight Converter

This converter converts a mass value expressed in kilograms (kg) to carats (ct). It is intended for quick, exact mathematical conversion when you have a numeric kilogram value and need the equivalent in carats.

The tool uses the defined unit relationship between the kilogram (SI base unit of mass) and the carat (a unit defined exactly as 0.2 grams). Guidance on measurement uncertainty, calibration, and legal metrology considerations is provided to help you use results appropriately.

Updated Nov 7, 2025QA PASS — golden 25 / edge 120Run golden-edge-2026-01-23

Governance

Record b502238ab060 • Reviewed by Fidamen Standards Committee

Interactive converter unavailable for this calculator.

We could not resolve compatible units for this experience. Please verify the slug follows the pattern `from-unit-to-unit-converter`.

Methodology

Unit definitions: one carat is defined as exactly 0.2 grams. One kilogram equals 1000 grams. The conversion is therefore a fixed mathematical relationship and does not require empirical measurement.

Best practice: perform conversions with sufficient significant figures for your use case, and when converting measured masses, account for measurement uncertainty and instrument calibration traceable to national standards (for example NIST or ISO/IEC 17025-accredited laboratories).

Key takeaways

Converting kilograms to carats is an exact fixed-factor conversion: multiply kilograms by 5000 to get carats.

For measurements from physical scales, apply appropriate rounding and report measurement uncertainty. Use calibrated equipment traceable to national standards for legal or high-value applications.

Worked examples

0.001 kg = 5 carats (0.001 × 5000 = 5).

0.5 kg = 2500 carats (0.5 × 5000 = 2500).

1 kg = 5000 carats (1 × 5000 = 5000).

F.A.Q.

Why is the conversion exact?

The carat is defined exactly as 0.2 grams and the kilogram is an SI base unit (1000 grams per kilogram), so the mathematical relationship between kilograms and carats is exact and fixed.

How do I convert carats back to kilograms?

To convert carats to kilograms divide by 5000. Example: 2500 carats ÷ 5000 = 0.5 kg.

How many significant figures should I use?

Choose significant figures based on the precision of your measurement instrument. For digitally reported measured masses, match the instrument's display precision and include a statement of measurement uncertainty when required by protocol or regulation.

Do I need to calibrate my scale before converting?

Yes for measured masses. Calibration ensures traceability to national standards and reduces systematic error. Use calibration intervals and procedures consistent with ISO/IEC 17025 or your organization's quality management rules.

Are there legal or safety considerations?

For trade or legal metrology (e.g., selling gemstones by mass) follow applicable national regulations and OIML recommendations. For manual handling of heavy items refer to workplace safety guidance such as OSHA ergonomics and manual handling resources to prevent injury.

Sources & citations

Further resources

Versioning & Change Control

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

Record ID: b502238ab060

What changed (latest)

v1.0.0 • 2025-11-07 • 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 7, 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 • 2025-11-07 • 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: 11b20246dc9d