How many pounds are in a kilogram?

One kilogram is 1 divided by 0.45359237 pounds, which is about 2.2046 pounds.

How many kilograms are in a stone?

One stone is 14 pounds, which is exactly 6.35029318 kilograms.

How many grams are in an ounce?

One avoirdupois ounce is exactly 28.349523125 grams, usually rounded to 28.35 grams.

What is the difference between a ton and a tonne?

A tonne is 1000 kg. A short ton, used in the United States, is 2000 pounds or 907.18474 kg. A long ton is 2240 pounds or 1016.0469088 kg.

Weight conversion tables: kg, pounds, stones, ounces

One pound is exactly 0.45359237 kilograms. Every table on this page is calculated from that definition and rounded to the decimals shown.

Last updated: September 28, 2026

Units and exact factors: how the tables are derived

Weight units and their metric equivalents
Unit	Equals	Value is
1 ounce	28.349523125 g	exact
1 pound (16 ounces)	0.45359237 kg	exact
1 stone (14 pounds)	6.35029318 kg	exact
1 short ton (2000 pounds)	907.18474 kg	exact
1 long ton (2240 pounds)	1016.0469088 kg	exact
1 tonne (metric ton)	1000 kg	exact
1 gram	0.0353 oz	rounded
1 kilogram	2.2046 lb	rounded

The short ton is the ton of the United States; the long ton is the traditional British ton. The tonne, or metric ton, is 1000 kilograms.

Kilograms to pounds and stones

The stone of 14 pounds is a British unit. The third column gives the weight in stones and remaining pounds.

Kilograms to pounds, and to stones and pounds
Kilograms (kg)	Pounds (lb)	Stones and pounds
1	2.2	0 st 2.2 lb
2	4.4	0 st 4.4 lb
3	6.6	0 st 6.6 lb
4	8.8	0 st 8.8 lb
5	11.0	0 st 11 lb
6	13.2	0 st 13.2 lb
7	15.4	1 st 1.4 lb
8	17.6	1 st 3.6 lb
9	19.8	1 st 5.8 lb
10	22.0	1 st 8 lb
11	24.3	1 st 10.3 lb
12	26.5	1 st 12.5 lb
13	28.7	2 st 0.7 lb
14	30.9	2 st 2.9 lb
15	33.1	2 st 5.1 lb
16	35.3	2 st 7.3 lb
17	37.5	2 st 9.5 lb
18	39.7	2 st 11.7 lb
19	41.9	2 st 13.9 lb
20	44.1	3 st 2.1 lb
25	55.1	3 st 13.1 lb
30	66.1	4 st 10.1 lb
35	77.2	5 st 7.2 lb
40	88.2	6 st 4.2 lb
45	99.2	7 st 1.2 lb
50	110.2	7 st 12.2 lb
55	121.3	8 st 9.3 lb
60	132.3	9 st 6.3 lb
65	143.3	10 st 3.3 lb
70	154.3	11 st 0.3 lb
75	165.3	11 st 11.3 lb
80	176.4	12 st 8.4 lb
85	187.4	13 st 5.4 lb
90	198.4	14 st 2.4 lb
95	209.4	14 st 13.4 lb
100	220.5	15 st 10.5 lb

Pounds to kilograms

Pounds to kilograms
Pounds (lb)	Kilograms (kg)
1	0.45
2	0.91
3	1.36
4	1.81
5	2.27
6	2.72
7	3.18
8	3.63
9	4.08
10	4.54
11	4.99
12	5.44
13	5.90
14	6.35
15	6.80
16	7.26
17	7.71
18	8.16
19	8.62
20	9.07
25	11.34
30	13.61
35	15.88
40	18.14
45	20.41
50	22.68
55	24.95
60	27.22
65	29.48
70	31.75
75	34.02
80	36.29
85	38.56
90	40.82
95	43.09
100	45.36
110	49.90
120	54.43
130	58.97
140	63.50
150	68.04
160	72.57
170	77.11
180	81.65
190	86.18
200	90.72
210	95.25
220	99.79
230	104.33
240	108.86
250	113.40

Ounces and grams

Ounces to grams, 1 to 16 ounces
Ounces (oz)	Grams (g)
1	28.3
2	56.7
3	85.0
4	113.4
5	141.7
6	170.1
7	198.4
8	226.8
9	255.1
10	283.5
11	311.8
12	340.2
13	368.5
14	396.9
15	425.2
16	453.6

Grams to ounces
Grams (g)	Ounces (oz)
10	0.35
25	0.88
50	1.76
100	3.53
125	4.41
150	5.29
200	7.05
250	8.82
300	10.58
400	14.11
500	17.64
750	26.46
1000	35.27

How to convert a value that is not in a table

Kilograms to pounds: divide by 0.45359237.
Pounds to kilograms: multiply by 0.45359237.
Stones and pounds to kilograms: multiply the stones by 14, add the pounds, then multiply by 0.45359237.
Ounces to grams: multiply by 28.349523125.

You can also add rows. 23 kg is 20 kg plus 3 kg. Add the exact values before rounding: 23 divided by 0.45359237 is 50.7 pounds.

Worked example: a suitcase of 23 kg

23 divided by 0.45359237 is 50.706 pounds.
Rounded to one decimal the suitcase weighs 50.7 pounds.

A limit of 50 pounds is therefore slightly lower than a limit of 23 kg: 50 pounds are 22.68 kg. If your ticket states the limit in one unit and your scale shows the other, convert the limit, not only the reading.

Common mistakes

Using 2.2 pounds per kilogram for large values. At 100 kg the shortcut gives 220 pounds; the exact value is 220.5.
Reading 10.5 stone as 10 stone 5 pounds. Half a stone is 7 pounds.
Confusing ounces of weight with fluid ounces. A fluid ounce measures volume.
Confusing the ton of 2000 pounds, the ton of 2240 pounds and the tonne of 1000 kg. Ask which one is meant.

Sources and checks

The values in the chart are calculated from the definitions in the sources below. They are not copied from another chart. Last checked against the sources on September 28, 2026.

Every value is calculated from the exact definition of the avoirdupois pound, 0.45359237 kg, and rounded half up to the decimals shown.

Stones and pounds are calculated from the pound value rounded to one decimal, so that both columns agree.

Ounces here are avoirdupois ounces for weight. Fluid ounces measure volume and troy ounces are used for precious metals; neither is covered.

National Bureau of Standards, Refinement of Values for the Yard and the Pound, Federal Register, 1 July 1959 (NOAA copy)

Used for: The exact definitions of 1959: one yard is 0.9144 metre and one avoirdupois pound is 0.45359237 kilogram.

NIST Handbook 44 (2026), Appendix C, General Tables of Units of Measurement

Used for: Exact values of the inch, foot, yard, mile, nautical mile, ounce, pound and tons, and the stone of 14 pounds.

NIST Special Publication 811, Appendix B, Conversion Factors

Used for: Conversion factors and which of them are exact.

Frequently asked questions

How many pounds are in a kilogram?: One kilogram is 1 divided by 0.45359237 pounds, which is about 2.2046 pounds.
How many kilograms are in a stone?: One stone is 14 pounds, which is exactly 6.35029318 kilograms.
How many grams are in an ounce?: One avoirdupois ounce is exactly 28.349523125 grams, usually rounded to 28.35 grams.
What is the difference between a ton and a tonne?: A tonne is 1000 kg. A short ton, used in the United States, is 2000 pounds or 907.18474 kg. A long ton is 2240 pounds or 1016.0469088 kg.