Weight Converter

Convert weight between kilograms, pounds, and stone + pounds. Type into any field and the others update instantly. Free and private, right in your browser.

Common weights

kg	lb	Stone + lb
50 kg	110.2 lb	7 st 12.2 lb
60 kg	132.3 lb	9 st 6.3 lb
70 kg	154.3 lb	11 st 0.3 lb
80 kg	176.4 lb	12 st 8.4 lb
90 kg	198.4 lb	14 st 2.4 lb

How to convert between kg and lb

• Kilograms to pounds: multiply by 2.20462. Example: 70 kg × 2.20462 = 154.3 lb.
• Pounds to kilograms: multiply by 0.45359237. Example: 150 lb × 0.45359237 = 68.0 kg.
• Pounds to stone: divide by 14. Example: 154 lb ÷ 14 = 11 stone exactly.

For a quick mental estimate, double the kilograms and add 10%: 70 kg → 140 + 14 = 154 lb.

Pounds to kilograms

lb	kg
100 lb	45.4 kg
120 lb	54.4 kg
150 lb	68.0 kg
180 lb	81.6 kg
200 lb	90.7 kg
250 lb	113.4 kg

Where you'll need it

• Travel: airline baggage limits are often 23 kg (about 50 lb) for checked bags.
• Fitness: gym plates and dumbbells may be marked in kg or lb — a 20 kg plate is about 44 lb.
• Health: doctors and medicine doses often use kilograms even in the US.
• Cooking and shipping: recipes and package labels from other countries use kilograms and grams.

Frequently asked questions

How many pounds is 1 kilogram?

1 kg is about 2.20462 lb, using the internationally defined exact conversion (1 lb = 0.45359237 kg).

How many pounds are in a stone?

A stone is exactly 14 pounds — a unit still commonly used for body weight in the UK and Ireland.

Does it work in both directions?

Yes — type into any of the three fields (kilograms, pounds, or stone + pounds) and the others update instantly.

Is a pound exactly 0.45 kg?

Not quite. Since 1959, one pound has been defined as exactly 0.45359237 kg. Rounding to 0.45 is fine for a quick estimate, but it's about 0.8% off.

What is 1 kg in ounces?

One kilogram is about 35.27 ounces, or 2 pounds 3.27 ounces.