Multiply Hex Numbers
Quickly calculate the product of a bunch of hex numbers. Runs entirely in your browser, so your data never leaves your device.
0 chars · 0 lines
Output
The result appears here as you type.
How to use Multiply Hex Numbers
- 1. Enter the factors. Paste two or more hex numbers, separated by spaces or newlines, into the input pane. For instance a and b are read as ten and eleven, not as letters.
- 2. Let it compute the product. There are no options; every value in the input is multiplied together and the running product is kept in hex throughout, so a times b comes out as 6e rather than 110 decimal.
- 3. Copy the product. Copy the final hex product from the output pane into your buffer-size calculation, code comment or spec. Add more factors to the input and the result updates immediately.
When to use Multiply Hex Numbers
Multiply Hex Numbers computes the product of a list of hexadecimal values and reports the answer in hex. Most calculators force you through decimal for this, inviting conversion slips along the way. Use it whenever sizes, counts or scaling factors in a low-level context are already expressed in base 16.
- Sizing a buffer from hex dimensions. A memory-mapped framebuffer is 0x280 pixels wide and 0x1e0 tall at 4 bytes each. Multiplying the three values in hex gives the region size in exactly the units your linker script uses.
- Scaling record counts by entry size. A file header says there are 0x3e8 records of 0x40 bytes. The product tells you where the data section ends, and you never had to think in decimal to get there.
- Checking compiler-computed constants. A disassembly contains a magic constant the compiler folded from a multiplication of two hex literals. Reproduce the multiplication here to confirm the constant is what the source implies.
- Working through textbook exercises. Students practicing long multiplication in base 16 can verify each homework answer against the tool's result and find exactly which problem went wrong.
Examples
Multiply two hex numbers
Input
a b
Output
6e
Multiply by a byte
Input
ff 2
Output
1fe
About the Multiply Hex Numbers tool
Multiply Hex Numbers is a free online tool that works entirely inside your web browser. Quickly calculate the product of a bunch of hex numbers. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 108 Hex utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
There is nothing to configure. Provide the input and the result appears on its own. 2 worked examples further down the page show exactly what the tool produces for real inputs.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Does Multiply Hex Numbers 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.