Decimal to Binary Converter
Enter a decimal number to get its binary representation. Understand how computers store numbers and learn binary arithmetic.
Decimal to Binary
Base 10 → Base 2
0b
—
How to Use the Decimal to Binary Converter
1
Enter a decimal number (e.g. 42).
2
Click Convert.
3
View the binary equivalent.
Frequently Asked Questions
How is decimal converted to binary?
Repeatedly divide by 2 and record remainders. Read the remainders bottom to top: 13 = 1101 in binary.
Can I convert negative numbers?
This tool converts positive integers. Negative numbers in binary use two's complement representation.
What about decimal fractions?
This tool handles whole numbers. Fractional binary representation requires a different process.