How do I convert kilograms to pounds?

Multiply kilograms by 2.20462. For example, 70 kg = 154.32 lbs. To reverse, multiply pounds by 0.453592.

What is the difference between a gram and a milligram?

One gram equals 1,000 milligrams. Milligrams are used for precise small measurements in medicine and chemistry.

Weight Converter — Kilograms, Pounds, Grams, Ounces & More

Weight Converter — Convert kg, lbs, Grams, Ounces & More

This free weight converter lets you instantly switch between any metric or imperial weight unit. Whether you need to convert kilograms to pounds for a fitness goal, grams to ounces for a cooking recipe, or carats to milligrams for a jewelry calculation, this tool gives you a precise answer in seconds.

Weight conversion is one of the most common unit conversions in everyday life. The United States uses the Imperial system (pounds and ounces) while most of the world uses the metric system (kilograms and grams) — making kg to lbs conversion one of the most frequently searched conversions online. This calculator handles all standard weight units accurately using exact conversion factors.

How to Convert Weight Units — Step by Step

Enter a value in the "Enter Value" field — for example, type 75 to convert 75 units of weight.
Select the "From" unit — the unit you are converting from, such as Kilograms or Pounds.
Select the "To" unit — the unit you want to convert to, such as Pounds or Ounces.
Click "Convert" — your result appears instantly with the exact conversion factor shown.
Use the swap button to instantly reverse the conversion without re-entering your value.

No sign-up. No ads blocking your result. Just fast, accurate weight conversion.

Weight Conversion Formulas Explained

All weight conversions use kilograms as the base unit. Each unit has a fixed conversion factor expressing how many kilograms it equals. To convert from Unit A to Unit B, the calculator first converts A to kilograms, then multiplies by the conversion factor for B.

General Weight Conversion Formula

Result = Input × (Factor_from ÷ Factor_to)
Where each factor = how many kilograms that unit equals

Example: Convert 10 kg → lbs
10 ÷ 0.453592 = 22.046 lbs

Example: Convert 500 g → oz
0.5 ÷ 0.0283495 = 17.637 oz

Exact Conversion Factors (relative to 1 kg)

Unit	Symbol	Kilograms Equivalent
Kilogram	kg	1
Gram	g	0.001
Milligram	mg	0.000001
Metric Ton (Tonne)	t	1000
Pound	lb	0.45359237
Ounce	oz	0.0283495231
Stone	st	6.35029318
US Short Ton	ton	907.18474
Imperial Long Ton	long ton	1016.04691
Carat	ct	0.0002
Microgram	µg	0.000000001

Kilograms to Pounds — The Most Common Conversion

The most searched weight conversion is kilograms to pounds. The exact formula is: multiply kilograms by 2.20462 to get pounds. Going the other way — pounds to kilograms — multiply by 0.453592.

kg → lbs: 70 kg × 2.20462 = 154.324 lbs
lbs → kg: 150 lbs × 0.453592 = 68.039 kg
g → oz: 100 g × 0.035274 = 3.527 oz
oz → g: 8 oz × 28.3495 = 226.796 g
stone → kg: 11 st × 6.35029 = 69.853 kg

Metric vs Imperial Weight Units — Key Differences

The world uses two primary weight measurement systems. Understanding both makes conversions much more intuitive.

Metric System (SI) Used by most of the world. Based on powers of 10. Key units: microgram → milligram → gram → kilogram → metric ton. 1 kg = 1,000 g = 1,000,000 mg.

Imperial / US Customary Used primarily in the US. Key units: ounce → pound → stone → short ton. 1 lb = 16 oz. 1 stone = 14 lbs. 1 US ton = 2,000 lbs.

Carats (Jewelry) The carat is the standard unit for gemstone weight. 1 carat = 0.2 grams = 200 milligrams. A 1-carat diamond weighs 0.2 g — not to be confused with gold karat (purity).

Tons: Metric vs Short vs Long A metric ton (tonne) = 1,000 kg. A US short ton = 907 kg. A UK long ton = 1,016 kg. Always clarify which "ton" is being used in shipping or industrial contexts.

When Do You Need to Convert Weight Units?

Weight conversion appears across virtually every area of daily life. Here are the most common real-world situations where a weight converter is essential:

Cooking & Baking Recipes from different countries use different units — US recipes use ounces and cups while European recipes use grams. Precise weight conversions ensure correct results.

Fitness & Body Weight Body weight is measured in kilograms in most countries but in pounds in the US and UK. Converting between kg and lbs is essential for tracking fitness goals internationally.

Shipping & Logistics International shipping requires weight in kg for most carriers. Converting product weights from lbs to kg ensures accurate shipping cost calculations and customs documentation.

Science & Medicine Drug dosages are often expressed in mg or µg per kg of body weight. Lab measurements use grams and milligrams. Precise weight conversion is critical for safety.

Jewelry & Gemstones Gemstone weight is measured in carats. Converting carats to grams or milligrams is needed for customs declarations, insurance valuations, and material comparisons.

Agriculture & Trade Commodity trading uses metric tons for most crops globally. Converting between short tons, long tons, and metric tons is essential for international agricultural trade.

Weight Conversion Quick Reference Table

Use this quick-reference table for the most common weight conversions without calculating. Values are rounded to 5 significant figures.

From	To	Multiply By	Example
Kilograms (kg)	Pounds (lbs)	2.2046	70 kg = 154.32 lbs
Pounds (lbs)	Kilograms (kg)	0.45359	150 lbs = 68.04 kg
Kilograms (kg)	Grams (g)	1000	2 kg = 2000 g
Grams (g)	Ounces (oz)	0.035274	100 g = 3.527 oz
Ounces (oz)	Grams (g)	28.350	8 oz = 226.8 g
Pounds (lbs)	Ounces (oz)	16	2 lbs = 32 oz
Stone (st)	Pounds (lbs)	14	10 st = 140 lbs
Stone (st)	Kilograms (kg)	6.3503	10 st = 63.50 kg
Metric Ton (t)	Kilograms (kg)	1000	2 t = 2000 kg
Metric Ton (t)	Pounds (lbs)	2204.6	1 t = 2204.6 lbs
Carats (ct)	Grams (g)	0.2	5 ct = 1 g
Milligrams (mg)	Grams (g)	0.001	500 mg = 0.5 g

How to Convert Stone to kg and lbs — A Practical Guide

The stone is a unit of weight used primarily in the United Kingdom and Ireland to measure body weight. One stone equals exactly 14 pounds or 6.35029 kilograms. Many people in the UK describe their weight in stone and pounds combined — for example, "11 stone 4 pounds."

Converting Stone + Pounds to kg

Convert 11 st 4 lbs to kg:
Total pounds = (11 × 14) + 4 = 158 lbs
158 × 0.453592 = 71.668 kg

Convert 12 st 0 lbs to kg:
Total pounds = 12 × 14 = 168 lbs
168 × 0.453592 = 76.204 kg

Common Body Weight Reference Table (Stone to kg)

Stone	Pounds	Kilograms
8 st	112 lbs	50.8 kg
9 st	126 lbs	57.2 kg
10 st	140 lbs	63.5 kg
11 st	154 lbs	69.9 kg
12 st	168 lbs	76.2 kg
13 st	182 lbs	82.6 kg
14 st	196 lbs	88.9 kg
15 st	210 lbs	95.3 kg

Frequently Asked Questions

Multiply kilograms by 2.20462 to get pounds. For example, 70 kg × 2.20462 = 154.32 lbs. To convert pounds back to kilograms, multiply by 0.453592. So 154.32 lbs × 0.453592 = 70 kg.

There are exactly 16 ounces in one pound. This is a fixed, defined relationship in the Imperial and US customary systems. So 2 lbs = 32 oz, and 0.5 lbs = 8 oz.

One gram equals 1,000 milligrams. Milligrams are used for very small and precise measurements — commonly in medicine (drug doses), nutrition labels (vitamins and minerals), and chemistry. For example, a standard aspirin tablet contains 325 mg of aspirin.

A metric ton (tonne) equals 1,000 kg (2,204.6 lbs). A US short ton equals 2,000 lbs (907.2 kg). A UK long ton equals 2,240 lbs (1,016 kg). The metric ton is the standard in international trade. Always confirm which type of ton is being used in contracts and shipping documents.

One carat equals exactly 0.2 grams (200 milligrams). The carat is the standard unit for measuring gemstone weight — diamonds, rubies, sapphires, and emeralds. Note that a jewelry carat (weight) is completely different from a gold karat (purity, e.g. 18 karat gold).

Multiply the number of stones by 6.35029 to get kilograms. For example, 12 stone × 6.35029 = 76.2 kg. If your weight includes additional pounds (e.g., 12 stone 6 lbs), convert the pounds to kg first (6 × 0.453592 = 2.72 kg), then add to the stone result.

For weight (avoirdupois ounce), yes — one US ounce equals one UK ounce, both equal to 28.3495 grams. However, for fluid ounces (volume), US and UK ounces differ: 1 US fl oz = 29.57 mL, while 1 UK fl oz = 28.41 mL. This converter handles weight ounces only.

Weight conversion is needed in cooking (recipes from different countries), fitness (body weight in kg vs lbs), shipping (package weight for carriers), medicine (drug dosages in mg/kg), jewelry (gemstones in carats), and international trade (commodity weights in tonnes vs short tons).

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