三十六進制，以36為底的進位制，運用0至9和A至Z，A至Z分別代表10至35。
運用到所有英語字母。
| 十進制 |
三十六進制
|
| 0 |
0
|
| 1 |
1
|
| 2 |
2
|
| 3 |
3
|
| 4 |
4
|
| 5 |
5
|
| 6 |
6
|
| 7 |
7
|
| 8 |
8
|
| 9 |
9
|
| 10 |
A
|
| 11 |
B
|
| 12 |
C
|
| 13 |
D
|
| 14 |
E
|
| 15 |
F
|
| 16 |
G
|
| 17 |
H
|
| 18 |
I
|
| 19 |
J
|
| 20 |
K
|
| 21 |
L
|
| 22 |
M
|
| 23 |
N
|
| 24 |
O
|
| 25 |
P
|
| 26 |
Q
|
| 27 |
R
|
| 28 |
S
|
| 29 |
T
|
| 30 |
U
|
| 31 |
V
|
| 32 |
W
|
| 33 |
X
|
| 34 |
Y
|
| 35 |
Z
|
| 36 |
10
|
| 37 |
11
|
| 38 |
12
|
| 39 |
13
|
- 在五個最常用分數(1/2、1/3、2/3、1/4、3/4)在三十六進制的表達形式都是有限小數(0.I、0.C、0.O、0.9、0.R)，有限小數只有一位。
- 分母為2的冪分數在三十六進制形式比起十進制較為簡短。
| 十進制 |
三十六進制
|
| 1/2 = 0.5 |
1/2 = 0.I
|
| 1/3 = 0.(3) |
1/3 = 0.C
|
| 2/3 = 0.(6) |
2/3 = 0.O
|
| 1/4 = 0.25 |
1/4 = 0.9
|
| 3/4 = 0.75 |
3/4 = 0.R
|
| 十進制 |
三十六進制
|
| 1/2 = 0.5 |
1/2 = 0.I
|
| 1/3 = 0.(3) |
1/3 = 0.C
|
| 1/4 = 0.25 |
1/4 = 0.9
|
| 1/5 = 0.2 |
1/5 = 0.(7)
|
| 1/6 = 0.1(6) |
1/6 = 0.6
|
| 1/7 = 0.(142857) |
1/7 = 0.(5)
|
| 1/8 = 0.125 |
1/8 = 0.4I
|
| 1/9 = 0.(1) |
1/9 = 0.4
|
| 1/10 = 0.1 |
1/A = 0.3(L)
|
| 1/11 = 0.(09) |
1/B = 0.(39TGD)
|
| 1/12 = 0.08(3) |
1/C = 0.3
|
| 1/13 = 0.(076923) |
1/D = 0.(2ROX8B)
|
| 1/14 = 0.0(0714285) |
1/E = 0.2(K)
|
| 1/15 = 0.0(6) |
1/F = 0.2(E)
|
| 1/16 = 0.0625 |
1/G = 0.29
|
| 1/17 = 0.(0588235294117647) |
1/H = 0.(248GXVRJ)
|
| 1/18 = 0.0(5) |
1/I = 0.2
|
| 1/19 = 0.(052631578947368421) |
1/J = 0.(1W7KUBD9H)
|
| 1/20 = 0.05 |
1/K = 0.1(S)
|
| 1/21 = 0.(047619) |
1/L = 0.1(P)
|
| 1/22 = 0.0(45) |
1/M = 0.1(MWQ6J)
|
| 1/23 = 0.(0434782608695652173913) |
1/N = 0.(1KCIS69E34P)
|
| 1/24 = 0.041(6) |
1/O = 0.1I
|
| 1/25 = 0.04 |
1/P = 0.(1FU8N)
|
| 1/26 = 0.0(384615) |
1/Q = 0.1(DUGM5J)
|
| 1/27 = 0.(037) |
1/R = 0.1C
|
| 1/28 = 0.03(571428) |
1/S = 0.1(A)
|
| 1/29 = 0.(0344827586206896551724137931) |
1/T = 0.(18OTSJV)
|
| 1/30 = 0.0(3) |
1/U = 0.1(7)
|
| 1/31 = 0.(032258064516129) |
1/V = 0.(15T)
|
| 1/32 = 0.03125 |
1/W = 0.14I
|
| 1/33 = 0.(03) |
1/X = 0.(139TGD)
|
| 1/34 = 0.0(2941176470588235) |
1/Y = 0.1(248GXVRJ)
|
| 1/35 = 0.0(285174) |
1/Z = 0.(1)
|
| 1/36 = 0.02(7) |
1/10 = 0.1
|
| 十進制 |
三十六進制
|
| 1/2 = 0.5 |
1/2 = 0.I
|
| 1/4 = 0.25 |
1/4 = 0.9
|
| 1/8 = 0.125 |
1/8 = 0.4I
|
| 1/16 = 0.0625 |
1/G = 0.29
|
| 1/32 = 0.03125 |
1/W = 0.14I
|
| 1/64 = 0.015625 |
1/1S = 0.0K9
|
| 1/128 = 0.0078125 |
1/3K = 0.0A4I
|
| 1/256 = 0.00390625 |
1/74 = 0.0529
|
| 1/512 = 0.001953125 |
1/E8 = 0.02J4I
|
- 36在因數分解2和3各出現2次，但10在因數分解2和5只出現1次。
- 在分數中,三十六進制比起一些進位制（二進制、三進制、四進制、六進制、八進制、十進制、十二進制、十六進制）使用更方便。
