Convert Decimal to Binary Coded Decimal
Quickly convert decimal values to BCD values. Runs entirely in your browser, so your data never leaves your device.
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Output
The result appears here as you type.
How to use Convert Decimal to Binary Coded Decimal
- 1. Paste your decimal numbers. Enter one or more base 10 numbers into the input pane, such as a value taken from a calculator display or embedded system register.
- 2. Set the Separator. Type the character to place between the 4-bit nibbles of each digit, and between separate numbers, so the BCD output stays readable at a glance.
- 3. Copy the BCD output. Copy the resulting nibble-per-digit binary from the output pane into firmware notes, a seven-segment display driver spec, or a digital logic assignment.
When to use Convert Decimal to Binary Coded Decimal
Convert Decimal to Binary Coded Decimal encodes each decimal digit as its own 4-bit binary nibble, the format many calculators and digital clocks use internally. It saves you the manual digit-by-digit lookup when documenting BCD values.
- Documenting a seven-segment display driver. You are writing firmware for a digital clock and need the BCD nibble for each displayed digit to match against your driver chip's truth table.
- Studying digital logic coursework. A digital electronics course covers BCD adders and you want quick, verified BCD values for practice problems without converting each digit by hand.
- Debugging an old calculator or POS chip. You are reverse engineering a decades-old calculator chip that stores digits in BCD and want to confirm what decimal value a given register represents.
Examples
Convert
Input
65
Output
0110 0101
Single digit
Input
9
Output
1001
About the Convert Decimal to Binary Coded Decimal tool
Convert Decimal to Binary Coded Decimal runs as plain JavaScript in your browser tab, with no server behind it. Quickly convert decimal values to BCD values. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's Binary Tools section, 112 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
You can shape the output with the Separator setting, and the result refreshes the moment you change it. 2 worked examples further down the page show exactly what the tool produces for real inputs.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Does Convert Decimal to Binary Coded Decimal cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.