OpusDesk Hub Direct example
1 lb ≈ 0.45359237 kg.
Formula and calculation
kg = lb × 0.45359237
Substituting 1 lb gives approximately 0.45359237 kg. Definitions use the constants above; arithmetic uses browser floating point and displays at most 12 significant digits. The rounded table is not an instrument calibration or certified measurement.
Which units does this page use?
pounds: international avoirdupois pound: 0.45359237 kilograms; not troy weight.
kilograms: SI kilogram, a unit of mass rather than force.
When this direction is useful
Start here when your source record uses lb for shipping weights and weight-based specifications, but the receiving specification is expressed in kg for package mass and equipment specifications. Enter the original quantity rather than reusing a previously rounded result. If your source uses kg, use the reverse converter instead.
Conversion table
| pounds (lb) | kilograms (kg) |
|---|---|
| 0 | 0 |
| 1 | 0.45359237 |
| 5 | 2.26796185 |
| 10 | 4.5359237 |
| 100 | 45.359237 |
Limits and interpretation
These are non-negative physical quantities; negative inputs are rejected. Converting a unit changes neither the measured object nor the original precision. Use a decimal dot; grouping commas are not accepted. No external rates, live data or account are involved.
Frequently asked questions
Can I convert the other way?
Yes. Convert kilograms to pounds with the inverse equation. Rounding a result before converting it back can introduce a small difference.
Are these the same as every similarly named unit?
No. Check the two definitions above. International length, avoirdupois mass, US customary liquid measures and temperature readings are explicitly distinguished; an ambiguous label on a source document must be resolved first.
Where do the conversion definitions come from?
They use SI and defined customary conversion relationships. See the NIST Guide for the Use of SI. Output formatting is this tool's display policy, not extra measurement accuracy.