Pounds to Kilograms (lbs to kg) Converter

Pounds to Kilograms Conversion

Pounds (imperial) and kilograms (metric) are the world's two main weight units. The US uses pounds; most other countries use kilograms — so converting is essential for travel, shipping, and healthcare.

Conversion formula: 1 lb = 0.453592 kg — divide pounds by 2.20462.

When You Need This

International shipping — customs forms use kg
Medical records — clinics record weight in kg
Gym equipment — plates labeled in lb or kg
Travel — luggage limits stated in kg abroad
Metric countries — communicating weights

How to Convert

The Conversion Formula

One pound equals 0.45359237 kilograms. To convert, divide pounds by 2.20462 (or multiply by 0.4536). For quick mental math, divide by 2.2. To reverse, multiply kilograms by 2.20462.

kilograms = pounds ÷ 2.20462 — for example, 150 lb ÷ 2.20462 ≈ 68.0 kg.

Using the Tool

Enter the value

Type the amount you want to convert into the input field.

Read the result instantly

The converted value appears immediately in the second field — no button to press.

Swap or pick any unit

Press the swap button to reverse direction, or open a dropdown to choose a different unit.

Copy the result

Tap the copy icon next to either field to copy the value for your records.

Worked Examples

Pounds	Calculation	Kilograms
1 lb	`1 ÷ 2.20462`	0.45 kg
10 lb	`10 ÷ 2.20462`	4.54 kg
150 lb	`150 ÷ 2.20462`	68.04 kg
220 lb	`220 ÷ 2.20462`	99.79 kg

Features & Use Cases

Tool Capabilities

Instant Two-Way Conversion

Results update as you type. Use the swap button to reverse the direction in one click.

Any Unit, Any Pair

Searchable dropdowns let you switch to grams, ounces, pounds, stone, tons, carats and more — not just the default pair.

Copy & Quick Reference

Copy either value with one tap, and check the built-in reference table for common conversions at a glance.

Common Use Cases

International Shipping

Customs forms for metric countries use kilograms. Convert pound package weights for accurate international declarations.

Medical Records

Clinics and drug dosing use kilograms. Convert a patient's pound weight to kg for accurate, weight-based dosing.

Gym Equipment

Weight plates come in pound or kilogram sets. Convert to track lifts consistently across different gyms.

Travel & Luggage

Airlines abroad list limits in kg. Convert your pound-weighed bag to kilograms to avoid overweight fees.

Runs in your browser: All calculations happen locally on your device. Nothing is uploaded — fast and private.

Frequently Asked Questions

How many kilograms are in a pound?

One pound equals 0.45359237 kg. For quick estimates, divide pounds by 2.2.

How do I convert 150 lb to kilograms?

Divide by 2.20462: 150 ÷ 2.20462 ≈ 68 kg, a typical adult weight.

Is dividing by 2.2 accurate enough?

For everyday estimates, yes (about 0.2% off). For medical or precise needs, use 2.20462.

Why do clinics use kilograms?

Medication doses are often calculated per kilogram of body weight, so kg gives consistent, safer dosing worldwide.

How much is 200 lb in kilograms?

200 ÷ 2.20462 ≈ 90.7 kg.

Is the kilogram heavier than the pound?

Yes. One kilogram (2.2 lb) is more than twice a pound, so a kg figure is always smaller than its pound value.

Pounds to Kilograms