Pounds to KG Converter
Convert pounds to kilograms instantly with reference table.
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1 lb = 0.453592 kg
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 | 0.453592 |
| 2 | 0.907184 |
| 5 | 2.26796 |
| 10 | 4.53592 |
| 15 | 6.80388 |
| 20 | 9.07184 |
| 25 | 11.3398 |
| 50 | 22.6796 |
| 75 | 34.0194 |
| 100 | 45.3592 |
| 150 | 68.0388 |
| 200 | 90.7184 |
| 250 | 113.398 |
| 500 | 226.796 |
| 1,000 | 453.592 |
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How to Convert Pounds to Kilograms
Formula: kg = lbs × 0.453592
For a quick estimate, divide by 2.2. So 150 lbs ÷ 2.2 = about 68 kg.
| Pounds | Kilograms |
|---|---|
| 10 lbs | 4.54 kg |
| 20 lbs | 9.07 kg |
| 30 lbs | 13.61 kg |
| 40 lbs | 18.14 kg |
| 50 lbs | 22.68 kg |
| 60 lbs | 27.22 kg |
| 70 lbs | 31.75 kg |
| 80 lbs | 36.29 kg |
| 90 lbs | 40.82 kg |
| 100 lbs | 45.36 kg |
| 110 lbs | 49.90 kg |
| 120 lbs | 54.43 kg |
| 130 lbs | 58.97 kg |
| 140 lbs | 63.50 kg |
| 150 lbs | 68.04 kg |
| 160 lbs | 72.57 kg |
| 170 lbs | 77.11 kg |
| 180 lbs | 81.65 kg |
| 190 lbs | 86.18 kg |
| 200 lbs | 90.72 kg |
When You Need This Conversion
Body weight: 150 lbs = 68 kg, 200 lbs = 91 kg. International medical records, fitness apps, and BMI charts often use kilograms.
Gym plates: A standard 45 lb plate equals about 20.4 kg. In gyms with metric equipment, the standard plate is 20 kg (44 lbs) — close but not identical.
Airline luggage: Most airlines set a 50 lb (22.7 kg) limit for checked bags. International carriers typically advertise this as 23 kg.
For the reverse conversion, see KG to Pounds. For all weight conversions, visit our Weight Converter.
When to use this
You weigh 165 pounds and a medication dosage is based on weight in kilograms. Or you are shipping a package internationally and the carrier needs the weight in kilograms. Or you have just hit a personal record on the bench press and want to tell your European training partner what you lifted in units they understand. Multiply pounds by 0.45359237 to get kilograms — or type the number here and skip the math.
This conversion is the reverse of kg-to-lbs and comes up in the same contexts: fitness, medical settings, international shipping, and travel. Most of the world uses kilograms for body weight, so if you are filling out any form outside the US — a hospital intake form, a gym membership, a visa application — you will need your weight in kilograms.
Good to know
Quick mental math: divide by 2.2. For a rough estimate, divide pounds by 2 and subtract 10% of the result. So 150 lbs becomes 75 minus 7.5 = 67.5 kg (actual: 68.0 kg). Close enough for most practical purposes.
Medical dosing uses kilograms. Drug dosages are calculated in mg per kg of body weight. Getting this conversion wrong can mean under- or over-dosing, especially in pediatric medicine where margins are tighter. This is one context where precision matters — use the full decimal, not a rough estimate.
The pound has multiple definitions historically. The pound used in the US and UK today is the avoirdupois pound (453.59237 grams). Troy pounds (used for precious metals) are lighter at 373.24 grams. When someone says "a pound of gold," they technically mean a troy pound, which is less than a pound of feathers in the avoirdupois system — a favorite trick question with a genuinely interesting answer.
Quick Reference
| Pounds | Kilograms | Common Use |
|---|---|---|
| 1 lb | 0.454 kg | Package of butter |
| 5 lbs | 2.268 kg | Bag of sugar |
| 10 lbs | 4.536 kg | Large bag of flour |
| 25 lbs | 11.340 kg | Toddler weight |
| 50 lbs | 22.680 kg | Checked bag limit |
| 100 lbs | 45.359 kg | Small adult weight |
| 130 lbs | 58.967 kg | Average female weight (US) |
| 155 lbs | 70.307 kg | Moderate adult |
| 180 lbs | 81.647 kg | Average male weight (US) |
| 200 lbs | 90.718 kg | Large adult |
| 225 lbs | 102.058 kg | Heavyweight athlete |
| 250 lbs | 113.398 kg | Benchpress reference |