Pounds to KG Conversion: Formula, Table & Quick Reference

Converting between pounds and kilograms comes up constantly — from tracking your weight on international scales to shipping packages, checking airline luggage limits, and understanding medical dosages. Here’s everything you need for quick, accurate conversions.

The Conversion Formula

Kilograms = Pounds × 0.453592
Pounds = Kilograms × 2.20462

Quick approximation: Divide pounds by 2.2 for a fast estimate.

Examples:

• 150 lbs = 150 × 0.4536 = 68.04 kg
• 200 lbs = 200 × 0.4536 = 90.72 kg
• 75 kg = 75 × 2.2046 = 165.35 lbs

Conversion Table: Pounds to Kilograms

Lbs	Kg	Lbs	Kg	Lbs	Kg
5	2.27	100	45.36	200	90.72
10	4.54	110	49.90	210	95.25
20	9.07	120	54.43	220	99.79
30	13.61	130	58.97	230	104.33
40	18.14	140	63.50	240	108.86
50	22.68	150	68.04	250	113.40
60	27.22	160	72.57	260	117.93
70	31.75	170	77.11	270	122.47
80	36.29	180	81.65	280	127.01
90	40.82	190	86.18	300	136.08

Stones to Pounds to Kilograms

The UK and Ireland commonly use stones (1 stone = 14 pounds). Here’s the three-way conversion:

Stones	Pounds	Kilograms
7 st	98 lbs	44.45 kg
8 st	112 lbs	50.80 kg
9 st	126 lbs	57.15 kg
10 st	140 lbs	63.50 kg
11 st	154 lbs	69.85 kg
12 st	168 lbs	76.20 kg
13 st	182 lbs	82.55 kg
14 st	196 lbs	88.90 kg
15 st	210 lbs	95.25 kg
16 st	224 lbs	101.60 kg
17 st	238 lbs	107.95 kg
18 st	252 lbs	114.31 kg

Formula: Kilograms = (Stones × 14 + Extra Pounds) × 0.4536

Example: 11 stone 7 = (11 × 14 + 7) × 0.4536 = 161 × 0.4536 = 73.03 kg

Common Weight References

Real-world references help put numbers in context:

Item	Pounds	Kilograms
Newborn baby (average)	7.5 lbs	3.4 kg
Gallon of water	8.34 lbs	3.78 kg
House cat	8–11 lbs	3.6–5.0 kg
Bowling ball	10–16 lbs	4.5–7.3 kg
Carry-on luggage limit	15–22 lbs	7–10 kg
Checked bag limit (standard)	50 lbs	23 kg
Checked bag limit (premium)	70 lbs	32 kg
Large dog (Labrador)	65–80 lbs	29–36 kg
Average adult male (US)	200 lbs	90.7 kg
Average adult female (US)	171 lbs	77.5 kg

Airline luggage tip: Most international airlines use a 23 kg (50.7 lbs) checked bag limit. If your scale reads in pounds, you have 50 lbs as a safe threshold — that gives you a 0.7 lb buffer for the bag’s own weight to be under the 23 kg metric limit.

Quick mental math: To convert pounds to kg in your head, halve the number and subtract 10% of that result. For 180 lbs: half = 90, minus 10% (9) = 81 kg. Actual answer: 81.65 kg. Close enough for everyday use.

Calculate instantly with our Pounds to KG Converter.