Vigesimal to Decimal Converter

Type a vigesimal number to see it in decimal. Below: how the conversion works, a worked example and a conversion table.

CF vigesimal = 255 decimal

How to convert vigesimal to decimal

Multiply each digit by 20 raised to the power of its position (counting from 0 on the right) and add the results.

Example: CF to decimal

Vigesimal to decimal

Multiply each digit by 20 to the power of its position (0 on the right), then add:

DigitPlace valueDigit × place
C = 12201 = 20240
F = 15200 = 115

240 + 15 = 255

Vigesimal to Decimal table

VigesimalDecimal
0 0
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
A 10
B 11
C 12
D 13
E 14
F 15
G 16
H 17
I 18
J 19
10 20
11 21
12 22
13 23
14 24
15 25
16 26
17 27
18 28
19 29
1A 30
1B 31

Vigesimal to other systems

Other systems to decimal

Reverse conversion

Frequently asked questions

How do you convert vigesimal to decimal?

Multiply each digit by 20 raised to the power of its position (counting from 0 on the right) and add the results.

What is CF in decimal?

CF in vigesimal is 255 in decimal.