Can I convert ounces here?

Not on this pair page. Use the general unit converter for ounces and grams.

Does reverse use a rounded factor?

No. Both directions use the exact constant 0.45359237 kg/lb.

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Kilograms ↔ Pounds Converter

Convert body weight, shipping mass, and kitchen amounts with the exact international pound definition and one-click reverse.

Exact lb definition

Bidirectional

Common mass values

Forward divides kilograms by 0.45359237 to get pounds. Reverse multiplies pounds by the same factor.

Limitation: Uses the exact international avoirdupois pound (0.45359237 kg).

Jump to calculator · Sources & review

Free Calculators HubKg to Lbs Calculator

ConvertValueEnter kilograms for forward conversion, or pounds for reverse.

How to Convert Kg and Lbs

Choose direction, enter a non-negative mass, and read the converted result with the exact factor.

Choose kilograms → pounds or pounds → kilograms.

Exact factor

1 pound = 0.45359237 kilograms exactly under the international yard and pound agreement.

What the Conversion Means

Forward divides kilograms by 0.45359237 to get pounds. Reverse multiplies pounds by the same factor.

Worked Examples

70 kg to pounds

Inputs

value:70

direction:forward

Result

≈ 154.3236 lb

70 ÷ 0.45359237 ≈ 154.3235835 lb.

150 lb to kilograms

Inputs

value:150

direction:reverse

Result

≈ 68.0389 kg

150 × 0.45359237 = 68.0388555 kg.

Check the other direction

Flip to reverse and paste the output to confirm you land back near the original value.

Frequently Asked Questions

Yes for everyday mass—the international pound is the standard used in US customary mass.

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Conversion Formulas

Documented exact or standard factors with reverse mode.

Formula

value ÷ 0.45359237

Kg → lb

value ÷ 0.45359237

Lb → kg

value × 0.45359237

Scientific Background

Assumptions: international avoirdupois pound. Limitations: no stone/ounce UI; use the general unit converter for more mass units.

Sources & review

Kg to Lbs Calculator documents the references behind its formulas and assumptions. Always treat results as educational estimates, not personalized professional advice.

Last reviewed

August 2, 2026

Reference
nist.gov
https://www.nist.gov/pml/owm/si-units-mass
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