Online BCD Converter

Convert between decimal, binary, and BCD (Binary-Coded Decimal) formats instantly with this free online tool.

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About This Tool

This Online BCD Converter is a fully functional tool that allows you to convert between decimal numbers, binary values, and BCD (Binary-Coded Decimal) representations. BCD is a coding system where each decimal digit is represented by a fixed number of binary bits (usually 4). The tool performs real-time conversions with validation and displays detailed results including step-by-step explanations. It's perfect for students, engineers, and anyone working with digital systems or computer arithmetic.

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How to Use

Enter a decimal number (0-
in the 'Decimal' field, a binary number (up to 16 bits) in the 'Binary' field, or a BCD value (groups of 4 bits per digit) in the 'BCD' field.
Click the corresponding conversion button (e.g., 'Decimal to BCD & Binary') to perform the conversion.
View the results in the table below, which shows the input value and its equivalents in all three formats.
Use the 'Clear All' button to reset all fields and results.

Frequently Asked Questions

Find Quick Answers

What is BCD (Binary-Coded Decimal)?

BCD is a coding system where each decimal digit (0-9) is represented by a fixed number of binary bits, typically 4 bits. For example, decimal 7 is 0111 in BCD, and decimal 25 is represented as 0010 0101 (two 4-bit groups).

What is the range of decimal numbers supported?

The tool supports decimal numbers from 0 to 9999, which corresponds to BCD values up to 4 digits (16 bits). This covers most common use cases for BCD conversions.

Can I convert from binary or BCD to decimal?

Yes, the tool supports bidirectional conversion. You can input a binary number (up to 16 bits) or a BCD value (groups of 4 bits) and convert it to decimal and the other format.

How accurate are the conversions?

Conversions are mathematically precise and performed client-side using JavaScript, ensuring 100% accuracy for valid inputs within the supported range.

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