Binary to Decimal Converter — Free Number Converter 2026
Binary (base-2) and decimal (base-10) are the two most important number systems in computing. Binary uses only 0 and 1; decimal uses 0–9. Converting binary to decimal uses positional value: each bit position represents a power of 2. For example, 1010 in binary = 1×8 + 0×4 + 1×2 + 0×1 = 10 in decimal. Our converter shows the step-by-step calculation for every conversion so you can learn the process. No sign-up required — your data never leaves your browser. Works instantly on desktop, tablet, and mobile. Completely free with no daily usage limits, no watermarks, and no account needed. Trusted by students, professionals, and businesses worldwide. FixFlowHub is a browser-based toolbox with 120+ free utilities covering PDF, image, text, calculator, and productivity tools.
Frequently Asked Questions
How do you convert binary to decimal?
Write the binary number. Starting from the right, multiply each digit by 2 raised to its position (0, 1, 2, 3...). Sum all results. Example: 1101 = 8+4+0+1 = 13.
What is 1111 in decimal?
1111 in binary = 8+4+2+1 = 15 in decimal.
What is 255 in binary?
255 in binary is 11111111 — eight 1s. This is the maximum value of one byte (8 bits), which is why IP address segments and RGB color values max at 255.