top of page

Decimals are rounded to the nearest integer for anything other than base 10. Below is a list of letters and their numerical value:

A - 10     N - 23

B - 11      O - 24

C - 12     P - 25

D - 13     Q - 26

E - 14      R - 27

F - 15      S - 28

G - 16     T - 29

H - 17     U - 30

I - 18       V - 31

J - 19      W - 32

K - 20     X - 33

L - 21      Y - 34

M - 22    Z - 35

Tutorial
Tutorial
Base 10
÷
×
−

S

T

U

V

W

X

Y

Z

J

K

L

M

N

O

P

Q

R

A

B

C

D

E

F

G

H

I

+
C
.
=

+
-
Next

Choose a number between -36 and 36. This number is the base of your custom numeral system.

Click this button to toggle between inputting your custom numeral system and base 10.

Base 10
4
5
6
1
2
3
7
8
9

S

T

U

V

W

X

Y

Z

J

K

L

M

N

O

P

Q

R

A

B

C

D

E

F

G

H

I

-
+

This monitor displays numbers in your custom numeral system. For example, 130 in base 10 is represented as 1010 in base 5. Negative integers can only be represented in a number system with a negative base.

This monitor displays numbers in the base 10 numeral system.

Sometimes custom numeral systems require one digit to have a value greater than 9. These values are represented by letters.

bottom of page