Complete Guide to Weight Conversion

Whether you’re tracking your fitness journey, cooking international recipes, or simply need to convert between different weight measurements, our comprehensive weight converter calculator makes it easy to convert between pounds, kilograms, stone, and ounces instantly.

How to Convert Pounds to Kilograms

Converting pounds to kg is simple with our calculator. To manually convert pounds to kilograms, divide the weight in pounds by 2.20462. For example, 150 pounds equals 68.04 kg. Our pounds to kg converter handles this automatically, making it perfect for fitness tracking, medical measurements, and international weight comparisons.

Stone to Kilograms Conversion Made Easy

The stone measurement is commonly used in the UK and Ireland. One stone equals 14 pounds or 6.35029 kilograms. Our stone to kg calculator can handle both whole stones and additional pounds. For instance, 12 stone 7 lbs converts to approximately 79.4 kg. Whether you need to convert 10 stone in kg, 15 stone in kg, or any other stone measurement, our calculator provides instant results.

Common Weight Conversions

Here are some frequently searched weight conversions that our calculator can handle instantly:

Pounds (lbs)	Kilograms (kg)	Stone
100 lbs	45.36 kg	7 st 2 lbs
120 lbs	54.43 kg	8 st 8 lbs
140 lbs	63.50 kg	10 st 0 lbs
160 lbs	72.57 kg	11 st 6 lbs
180 lbs	81.65 kg	12 st 12 lbs
200 lbs	90.72 kg	14 st 4 lbs

BMI Calculator and Healthy Weight Guide

Our BMI calculator helps you determine if your weight is within a healthy range for your height. BMI (Body Mass Index) is calculated by dividing weight in kilograms by height in meters squared. Here’s what your BMI means:

• Underweight: BMI less than 18.5
• Normal weight: BMI 18.5-24.9
• Overweight: BMI 25-29.9
• Obese: BMI 30 or higher

Weight Conversion for Different Purposes

Our weight converter serves various needs:

Fitness and Health: Track your weight loss or muscle gain progress by converting between the units used by your scale and fitness apps. Whether you’re monitoring 120 pounds in kg or checking if 70 kg is a healthy weight, our calculator provides accurate conversions.

International Travel: Understanding weight limits for luggage when traveling between countries that use different measurement systems. Convert 50 lbs to kg for airline baggage restrictions or understand what 23 kg means in pounds.

Cooking and Recipes: Converting ingredient weights when following international recipes. Our calculator handles everything from converting 500g to lbs for baking to understanding portion sizes in different units.

Medical and Scientific: Healthcare professionals often need to convert between metric and imperial units for patient records, medication dosing, and research purposes.

Understanding Different Weight Measurement Systems

The metric system, used by most countries worldwide, measures weight in grams and kilograms. The imperial system, primarily used in the United States, uses ounces and pounds. The UK uses a mixed system including stones for body weight.

One kilogram equals 1,000 grams and is roughly equivalent to 2.2 pounds. The stone, equal to 14 pounds, is traditionally used in the UK and Ireland for measuring body weight. Understanding these relationships helps when traveling, reading international content, or communicating with people from different countries.

Tips for Accurate Weight Conversion

For the most accurate conversions, always use our calculator rather than rough mental estimates. When weighing yourself, use the same scale consistently and weigh at the same time of day for consistent tracking. Remember that muscle weighs more than fat, so focus on overall health rather than just the number on the scale.

Whether you need to convert 150 lbs to kg, find out how much 12 stone is in kg, or determine your ideal weight range, our comprehensive weight conversion calculator and guide provide all the tools and information you need for accurate weight measurements and conversions.