Example 1
1 kg of mass -> 2.2046 lb avoirdupois.
Kg to lbs
Enter a mass in kilograms or in pounds and pick the direction. The calculator uses 0.45359237 kg per pound. 70 kg is 154.3236 lb. This is avoirdupois, not troy and not lbf.
Smaller masses: grams and ounces. The kg and lb pair, with no stones.
Result
Enter a value. The result shows up here.
How it works
The avoirdupois pound has been exactly 0.45359237 kg since 1959. A kilogram times 2.204622622 gives pounds. 1 kg here is 2.2046 lb. A 70 kg body mass is 154.3236 lb. A 100 kg barbell is 220.4623 lb, not a “220” sign. Half a kilogram is 1.1023 lb.
A US gym board is often in pounds, while a home scale is in kilograms. 185 lb is 83.9146 kg. A 5 kg bag of flour is 11.0231 lb. The 2.2 lb-per-kg shortcut is close: typed 2.2 lb gives 0.9979 kg, not a clean 1 kg.
Pick the direction from the list: kg to lb or lb to kg. A comma and a period both work. Typed zero is allowed. The calculator does not accept a minus. The header switch sets kg or lb on an empty field and does not rewrite a typed 70.
Sixteen avoirdupois ounces make one pound; convert ounces on the grams and ounces page. BMI and ideal weight are on the health pages. Stones are not an input. On this page the calculator converts mass only between kg and avoirdupois lb.
The troy pound for bullion is lighter and is not used here. lbf is a force, not a mass. Plates marked lb are typed as pounds; plates marked kg are typed as kilograms.
The page does not judge body weight. It converts one mass. 70 kg is 154.3236 lb whether that is a person, a bag, or a barbell.
How to use
- Type a mass, for example 70 or 185.
- Pick kg to lb or lb to kg.
- Click Calculate. 70 kg gives 154.3236 lb. 1 kg is 2.2046 lb in the result.
- This is avoirdupois, not troy from a jeweler. Ounces are on the grams page.
- A whole pound stays here. For ounces, open grams.
Formula
lb = kg / 0.45359237
kg = lb × 0.45359237
Avoirdupois pound. 16 ounces = 1 lb, but ounces are a sibling page. lbf is force.
kg and avoirdupois lb on the scale
1 lb = 0.45359237 kg. 70 kg is 154.3236 lb. 1 kg is 2.2046 lb, not the 2.2 shortcut. Troy and lbf are not used here.
- kg
- Kilogram. 70 kg body mass, 5 kg of flour, 100 kg in the gym. Not a troy pound.
- lb
- Avoirdupois pound, 0.45359237 kg. 154.3236 from 70 kg. 16 oz = 1 lb; ounces are on the grams and ounces page.
Real-life examples
Example 2
70 kg body mass -> 154.3236 lb.
Example 3
1 avoirdupois lb -> 0.4536 kg.
Example 4
5 kg of flour -> 11.0231 lb.
Example 5
100 kg -> 220.4623 lb.
Example 6
the 2.2 lb shortcut -> 0.9979 kg, not exactly 1 kg.
Example 7
0.5 kg -> 1.1023 lb on the scale.
Example 8
185 lb on a bar -> 83.9146 kg.
Ways to use this converter
- You convert body mass from kilograms when the scale or the training plan is in lb.
- You check a 5 kg bag of flour against a recipe written in pounds.
Frequently asked questions
Is this avoirdupois or troy?
Avoirdupois: 0.45359237 kg. The troy pound is for bullion and is lighter. You do not weigh jewellery in troy here.
How many kilograms is exactly one pound?
Exactly 0.45359237 kg from the 1959 definition. 1 kg is about 2.204622622 lb, 2.2046 lb in the result.
Can mass be negative?
Zero kilograms is allowed and gives zero pounds. A minus is a typing mistake or a difference computed elsewhere. The calculator does not accept it.
What does the header switch do?
On an empty field, metric sets kg and US sets lb. It does not rewrite a typed number, only the label.
Is 1 kg 2.2 lb or 2.2046?
The 2.2 shortcut is close. To four places 1 kg is 2.2046 lb. Typed 2.2 lb is 0.9979 kg, not a full kilogram.
Should a person weigh in kg or lb?
In Poland usually kg, in the US usually lb. 70 kg is 154.3236 lb. The page does not judge a weight, it only converts.
Are ounces on this page?
16 avoirdupois ounces make one pound. Convert ounces on the grams and ounces page. This page covers the kg and lb pair only.
Is 100 kg 220 lb in the gym?
100 kg is 220.4623 lb. A “220” sign is a rounding. Plates marked in lb you type as pounds, not as 100.
How many lb is a 5 kg bag of flour?
5 kg is 11.0231 lb. Half a kilogram is 1.1023 lb. 185 lb back is 83.9146 kg. Same 0.45359237.
Do lbf and stone appear here?
lbf is force, not mass. Stone has no field here. This page covers only the kg and avoirdupois lb pair.
Knowledge sources
The converter multiplies your number by an SI factor. NIST SP 330 and BIPM define the units, not your reading.
Page updated in 2026.