The stone is a unit of weight that has a particularly rich history, mainly used in the UK and Ireland for human body weight measurement. Originating from the Biblical days, a stone was once standardized by the British Act of Parliament in 1835 to equal 14 pounds. This peculiar unit is still popular in daily life, especially in conversations about body weight or livestock; any Harry Potter fan will recognize Hagrid’s impressive weight mentioned in stones!
An interesting fact is that the symbol for stone “st” doesn’t change forms, much like “lb” for pounds, which can be confusing at first glance. Unlike metric units with their straightforward conversions, the cultural and historical essence of the stone makes it an intriguing part of British heritage, fostering a sense of continuity from medieval markets to modern times.
The ounce is a fascinating unit with a rich history, dating back to Ancient Rome. The term “ounce” is derived from the Latin word “uncia,” meaning “one-twelfth.” Originally used by the Romans as a unit of weight, an uncia represented one-twelfth of a Roman pound. The versatility of the ounce becomes even more intriguing when you consider its application in both weight and volume measurements today.
In the realm of precious metals, such as gold and silver, the term “troy ounce” is used, which is approximately 10% heavier than the customary ounce. Meanwhile, in British imperial and American systems, an ounce can denote both dry and liquid measurements. The fluid ounce, however, differs slightly between the UK and the US, with the UK fluid ounce being approximately 28.4 milliliters and the US at about 29.6 milliliters. This multifaceted unit highlights how historical roots continue to influence modern measurement systems worldwide.
| Stones | Ounces |
|---|---|
0
st
|
0
oz
|
0.5
st
|
112
oz
|
1
st
|
224
oz
|
1.5
st
|
336
oz
|
2
st
|
448
oz
|
2.5
st
|
560
oz
|
3
st
|
672
oz
|
3.5
st
|
784
oz
|
4
st
|
896
oz
|
4.5
st
|
1008
oz
|
5
st
|
1120
oz
|
5.5
st
|
1232
oz
|
6
st
|
1344
oz
|
6.5
st
|
1456
oz
|
7
st
|
1568
oz
|
7.5
st
|
1680
oz
|
8
st
|
1792
oz
|
8.5
st
|
1904
oz
|
9
st
|
2016
oz
|
9.5
st
|
2128
oz
|
10
st
|
2240
oz
|
10.5
st
|
2352
oz
|
11
st
|
2464
oz
|
11.5
st
|
2576
oz
|
12
st
|
2688
oz
|
12.5
st
|
2800
oz
|
13
st
|
2912
oz
|
13.5
st
|
3024
oz
|
14
st
|
3136
oz
|
14.5
st
|
3248
oz
|
15
st
|
3360
oz
|
15.5
st
|
3472
oz
|
16
st
|
3584
oz
|
16.5
st
|
3696
oz
|
17
st
|
3808
oz
|
17.5
st
|
3920
oz
|
18
st
|
4032
oz
|
18.5
st
|
4144
oz
|
19
st
|
4256
oz
|
19.5
st
|
4368
oz
|
20
st
|
4480
oz
|
20.5
st
|
4592
oz
|
21
st
|
4704
oz
|
21.5
st
|
4816
oz
|
22
st
|
4928
oz
|
22.5
st
|
5040
oz
|
23
st
|
5152
oz
|
23.5
st
|
5264
oz
|
24
st
|
5376
oz
|
24.5
st
|
5488
oz
|
25
st
|
5600
oz
|
25.5
st
|
5712
oz
|
26
st
|
5824
oz
|
26.5
st
|
5936
oz
|
27
st
|
6048
oz
|
27.5
st
|
6160
oz
|
28
st
|
6272
oz
|
28.5
st
|
6384
oz
|
29
st
|
6496
oz
|
29.5
st
|
6608
oz
|
30
st
|
6720
oz
|
30.5
st
|
6832
oz
|
31
st
|
6944
oz
|
31.5
st
|
7056
oz
|
32
st
|
7168
oz
|
32.5
st
|
7280
oz
|
33
st
|
7392
oz
|
33.5
st
|
7504
oz
|
34
st
|
7616
oz
|
34.5
st
|
7728
oz
|
35
st
|
7840
oz
|
35.5
st
|
7952
oz
|
36
st
|
8064
oz
|
36.5
st
|
8176
oz
|
37
st
|
8288
oz
|
37.5
st
|
8400
oz
|
38
st
|
8512
oz
|
38.5
st
|
8624
oz
|
39
st
|
8736
oz
|
39.5
st
|
8848
oz
|
40
st
|
8960
oz
|
40.5
st
|
9072
oz
|
41
st
|
9184
oz
|
41.5
st
|
9296
oz
|
42
st
|
9408
oz
|
42.5
st
|
9520
oz
|
43
st
|
9632
oz
|
43.5
st
|
9744
oz
|
44
st
|
9856
oz
|
44.5
st
|
9968
oz
|
45
st
|
10080
oz
|
45.5
st
|
10192
oz
|
46
st
|
10304
oz
|
46.5
st
|
10416
oz
|
47
st
|
10528
oz
|
47.5
st
|
10640
oz
|
48
st
|
10752
oz
|
48.5
st
|
10864
oz
|
49
st
|
10976
oz
|
49.5
st
|
11088
oz
|
50
st
|
11200
oz
|
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