Instant Pounds ↔ Kilograms Converter
Enter a value in either field and click the matching button to convert your weight accurately.
Why use a pounds kilograms calculator?
A pounds to kilograms calculator helps you switch between imperial and metric weight units in seconds. If you track fitness goals, follow international nutrition plans, compare shipping costs, or read medical data, fast and accurate conversion is essential.
In the United States, pounds (lb) are commonly used for body weight and packages. In many other countries, kilograms (kg) are the standard. This tool gives you both directions: pounds to kg and kg to pounds.
How to use this calculator
- Enter your value in Pounds (lb) and click Convert Pounds → Kilograms.
- Or enter your value in Kilograms (kg) and click Convert Kilograms → Pounds.
- Use the Clear button to reset both fields.
Weight conversion formulas
Pounds to kilograms formula
kilograms = pounds × 0.45359237
Example: 180 lb × 0.45359237 = 81.6466266 kg, which rounds to 81.65 kg.
Kilograms to pounds formula
pounds = kilograms ÷ 0.45359237
Example: 75 kg ÷ 0.45359237 = 165.3467 lb, which rounds to 165.35 lb.
Common pounds to kilograms conversions
- 100 lb = 45.359 kg
- 120 lb = 54.432 kg
- 140 lb = 63.503 kg
- 150 lb = 68.039 kg
- 160 lb = 72.575 kg
- 180 lb = 81.647 kg
- 200 lb = 90.719 kg
- 220 lb = 99.790 kg
When accurate conversion matters
Health and fitness
Many workout apps, smart scales, and strength programs use kilograms. If your gym weights, doctor records, or training plans use different units, conversion errors can affect progress tracking.
Travel and baggage limits
Airlines often list baggage allowances in kilograms even if you think in pounds. A quick conversion helps avoid overweight fees and packing mistakes.
Shipping and eCommerce
Product listings and courier calculators can require metric values. Converting package weights correctly can improve pricing accuracy and reduce fulfillment issues.
Quick FAQ
Is 1 kg equal to 2.2 lb?
Approximately. 1 kilogram equals 2.20462 pounds. Using 2.2 is fine for rough estimates, but exact calculations should use 2.20462 or the full formula.
How many kilograms is 150 pounds?
150 pounds is 68.0389 kilograms (about 68.04 kg).
Can I use decimals?
Yes. This calculator supports decimal values like 132.5 lb or 59.7 kg.
Final tip
For everyday use, rounding to two decimal places is usually enough. For scientific, medical, or logistics contexts, keep more decimal precision when needed. Bookmark this pounds kilograms calculator so you can convert instantly whenever you need reliable results.