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A in Decimal

Hexadecimal A equals 10 in decimal.

Hexadecimal → Decimal
A=10
Open A in the interactive hexadecimal to decimal converter →

A in all number bases

Decimal10
Hexadecimal0xA
Binary1010
Octal12

How a converts from hexadecimal to decimal

Multiply each digit by 16 raised to its position (starting at 0 from the right), then add the results:

A× 160 = 10 × 1 = 10

Sum: 10