What is 00101 in decimal?
00101₂ converted to decimal is 5₁₀. The place-value working for these exact bits is below — or try other bits in the binary to decimal converter.
Try it yourself — instant converter
See the steps for your number
How to convert 00101 to decimal, step by step
Give each bit its place value — 1, 2, 4, 8 and so on, doubling from the right — then add up the places where the bit is 1.
| Bit | Position | Place value | Bit × place |
|---|---|---|---|
| 0 | 4 | 16 | 0 |
| 0 | 3 | 8 | 0 |
| 1 | 2 | 4 | 4 |
| 0 | 1 | 2 | 0 |
| 1 | 0 | 1 | 1 |
Add the last column: 4 + 1 = 5. So 00101₂ = 5₁₀.
In short: 00101₂: 0×16 = 0 → +0×8 = 0 → +1×4 = 4 → +0×2 = 4 → +1×1 = 5
Frequently asked questions
How do you convert 00101 to decimal?
Use place values. The 1 bits sit at place values 4, 1, and 4 + 1 = 5. So 00101₂ = 5₁₀.
Why does 00101 start with a 0?
The leading 0 adds nothing — its place value contributes 0 — so 00101 has the same value as 101: 5 in decimal. The extra zero just keeps the number at 5 bits wide, the way it is often written in code or in search queries.
Keep converting
← 00100 in decimal · 00110 in decimal →
Popular values
1010 in decimal · 10101 in decimal · 11111 in decimal · 101010 in decimal