Grams to Pounds
Convert grams to pounds with the exact factor (1 g = 0.00220462 lb), a quick reference table, and common food and shipping weights.
g to lb formula
To convert grams (g) to pounds (lb), multiply by 0.00220462, because 1 pound = 453.592 g and 1 g = 1 / 453.592 lb.
Quick reference: g to lb
Common values
1 g = 0.0022 lb
100 g = 0.22 lb
250 g = 0.551 lb
500 g = 1.1 lb
1000 g = 2.2 lb
Worked example
Convert 500 g to pounds:
500 g × 0.00220462 = 1.10231 lb
So 500 g is about 1.10 lb.
Why convert g to lb?
Nutrition labels and small shipments often use grams, while the US uses pounds. This conversion makes package weights comparable.
You can also use our calculator or read the paired guide lb reference.
Frequently Asked Questions
How many pounds are in a gram?
1 g = 0.00220462 lb.
How many grams are in a pound?
1 lb = 453.592 g.
How do I convert 250 g to pounds?
250 g × 0.00220462 ≈ 0.551 lb.
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Quick Summary
g to lb uses a single exact factor. Use the formula above or the reference table for quick, accurate results.
Related Guide
Kg to Lbs: The Complete Kilograms to Pounds Conversion Guide
Master kg to lbs conversion with the exact 2.20462262 factor. Convert any kilograms to pounds for fitness, medical, travel, and shipping use.
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Lbs to Grams: Convert Pounds to Grams Exactly
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Read Full Guide →More in Weight Loss & Fitness
70 kg to lbs: Convert 70 Kilograms to Pounds for Fitness and Health
Convert 70 kg to lbs with the exact formula. 70 kilograms equals 154.32 pounds, a key weight for fitness tracking, medical records, and travel.
80 kg to lbs: Convert 80 Kilograms to Pounds for Training and Travel
Convert 80 kg to lbs with the exact formula. 80 kilograms equals 176.37 pounds, a common weight for strength training, body weight, and shipping.
100 kg to lbs: Convert 100 Kilograms to Pounds for Lifting and Logistics
Convert 100 kg to lbs with the exact formula. 100 kilograms equals 220.46 pounds, a key weight for heavy lifting, freight, and body weight records.
60 kg to lbs: Convert 60 Kilograms to Pounds for Fitness and Travel
Convert 60 kg to lbs with the exact formula. 60 kilograms equals 132.28 pounds, a common weight for fitness tracking, body weight, and luggage.
50 kg to lbs: Convert 50 Kilograms to Pounds for Health and Shipping
Convert 50 kg to lbs with the exact formula. 50 kilograms equals 110.23 pounds, a common weight for body weight, fitness, and shipping limits.
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Disclaimer
Unit conversions on this site use internationally recognized, fixed conversion factors (for example, 1 inch = 2.54 cm, 1 pound = 0.45359237 kg, 1 °F = (°C × 9/5) + 32). They are provided for general, informational, and educational use. For applications where accuracy is critical — such as medical dosing, engineering, scientific research, trade, or legal compliance — always verify results against authoritative sources such as the U.S. National Institute of Standards and Technology (NIST) and the official International System of Units (SI) brochure, and follow any applicable local standards.
Exact Constants & Authoritative Sources
Every conversion on this page uses the fixed, internationally agreed constants below — drawn from NIST and the SI Brochure. No values are estimated or rounded as if exact. See the full list on our Sources & Standards page.
- EXACT1 pound (lb, avoirdupois) = 0.45359237 kilograms (exact)
- EXACT1 ounce (oz, avoirdupois) = 28.349523125 grams (exact, 1/16 lb)
- EXACT1 stone (st) = 6.35029318 kilograms (exact, 14 lb)
- EXACT1 short ton (US) = 907.18474 kilograms (exact, 2000 lb)
Common Pitfalls & How to Avoid Them
Mass vs. weight
The pound and kilogram are units of MASS, not force. On Earth, mass and "weight" read the same number in practice, but a 70 kg mass weighs less on the Moon. UnitFig converts mass; for scientific force you need newtons (1 lbf = 4.4482216152605 N, exact).
Avoirdupois vs. troy ounce
Cooking and body weight use the avoirdupois ounce (28.349523125 g). Gold and precious metals use the troy ounce (31.1034768 g). Never mix them — the error is about 10%.
Rounding the factor
Using 2.2 instead of the exact 2.20462262 overstates small errors at large values. For medical dosing or competition weight classes, keep the full factor or use a converter.
A unit-conversion reference site has no manufacturer-specific or device calibration parameters, so "layered tuning" does not apply here. The only real error-handling is input validation: the converter rejects non-numeric, empty, or out-of-range entries and shows a clear message, then falls back to exact constants above. No estimated or rounded figures are ever presented as exact.
Authoritative sources for this page
- NIST (U.S. National Institute of Standards and Technology) — NIST SP 330 — The International System of Units (SI), 2019 edition
Last Updated 2026 | This article was reviewed for accuracy