Hex to Decimal Converter
Convert base-16 hexadecimal values (0-9, A-F) to base-10 decimal numbers.
Accepts digits 0–9 and letters A–F.
Powers of 16 (Place Value Expansion)
| Hex Digit | Position (n) | Digit Value | Weight ($16^n$) | Calculation |
|---|---|---|---|---|
| 1 | 3 | 1 | 16^3 = 4,096 | 1 × 4,096 = 4,096 |
| A | 2 | 10 | 16^2 = 256 | 10 × 256 = 2,560 |
| 3 | 1 | 3 | 16^1 = 16 | 3 × 16 = 48 |
| F | 0 | 15 | 16^0 = 1 | 15 × 1 = 15 |
Conversion Formula & Standards
Conversions follow International System of Units (SI) and ISO standard constants.
How to Use Hex to Decimal Converter
Type a hex string with or without the '0x' prefix (e.g., 1A3F or FF).
Invalid non-hex characters are detected immediately.
View the final decimal integer and the place-value power expansion.
Frequently Asked Questions
What is FF in decimal?
FF = (15 × 16¹) + (15 × 16⁰) = 240 + 15 = 255.
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