Kilograms to pounds converter

Kilogram labels are used for luggage allowances, bulk ingredients and body mass. Converting a whole or fractional kilogram into smaller units is useful when a scale or recipe expects a finer denomination. Keep the measurement's original precision instead of assuming every displayed digit was measured.

One kilogram is about 2.2046226218 pounds. The international avoirdupois pound is defined as exactly 0.45359237 kg (1959 agreement).

Multiply the number of kilograms by 2.2046226218. For example, 70 kg × 2.2046226218 = 154.323584 lb. To go the other way, divide by 2.2046226218.

Multiply by 2.2. That is 0.2% low of the exact factor 2.2046226218, so 70 kg comes out as 154 lb instead of 154.3236.

Accuracy depends on your inputs and the method's assumptions. Decimal arithmetic uses 50 significant digits, but estimates, numerical methods and source data can be less precise; the displayed rounding does not remove those limits. It is checked against 3 worked examples whose answers come from independent sources; for example, “70 kg to lb” is checked against Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions).

NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B; NIST Handbook 44, Appendix C: General tables of units of measurement; BIPM, The International System of Units (SI Brochure), 9th edition.