Hex to Decimal Converter
Convert between hexadecimal, decimal, binary and octal in every direction, with the place-value working shown.
Reading hex without a calculator
Each hex digit is exactly four binary digits, which is the whole reason the notation exists: 1A2F is 0001 1010 0010 1111 without any arithmetic. Place values run 16⁰, 16¹, 16², 16³ — so 1A2F is (1×4096) + (10×256) + (2×16) + 15 = 6703. Colour codes work the same way: #FF8000 is 255 red, 128 green, 0 blue.
How to use the Hex to Decimal Converter
- Fill in each field with your own figures — the defaults are only there as an example.
- The result updates as you type, so there is no button to press.
- Check the breakdown under the main result for the supporting numbers.
- Use the copy button to take the result with you, or share the link to reload the same inputs.
Hex to Decimal Converter — frequently asked questions
Is this hex to decimal converter free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
How accurate is the result?
The maths is exact for the formula shown on the page. Accuracy in the real world depends on your inputs and on assumptions the formula cannot see, so treat the output as a well-grounded estimate rather than a quote.
Can I use it on my phone?
Yes. The page is responsive, weighs a few kilobytes and works offline once loaded, so it behaves the same on a phone as on a desktop.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the hex to decimal converter.
- decimal to hexadecimal converter
About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error