Hexadecimal to Denary Conversion
This key facts covers Hexadecimal to Denary Conversion within Binary & Hex for GCSE Computer Science. Revise Binary & Hex in 3.3 Data Representation for GCSE Computer Science with 16 exam-style questions and 22 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 10 of 15 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 10 of 15
Practice
16 questions
Recall
22 flashcards
Hexadecimal to Denary Conversion
Method: Multiply place values (161, 160)
Example 1: Convert 3F to denary
Place values: 16¹ 16⁰
16 1
Hex: 3 F
3F = (3 × 16) + (15 × 1)
= 48 + 15
= 63 (denary)
Example 2: Convert 2A5 to denary
Place values: 16² 16¹ 16⁰
256 16 1
Hex: 2 A 5
2A5 = (2 × 256) + (10 × 16) + (5 × 1)
= 512 + 160 + 5
= 677 (denary)
Keep building this topic
Read this section alongside the surrounding pages in Binary & Hex. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Binary & Hex
Which of the following correctly describes the hexadecimal number system?
Explain why hexadecimal is used instead of binary when programmers write memory addresses and colour codes. Give three reasons.
Quick Recall Flashcards
16 questions on Binary & Hex — practise free
Instant marking, adaptive difficulty, and 22 spaced repetition flashcards. Free until your GCSEs.
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