This standard form calculator helps GCSE Maths students convert numbers to and from standard form. Standard form is used to write very large or very small numbers in a compact, easy-to-read way.
Standard form is written as:
a × 10n where 1 ≤ a < 10
It is commonly used in science, physics, astronomy, and higher-level maths.
Example 1: Convert to standard form
Write 45,000 in standard form.
Move the decimal point until the number is between 1 and 10:
45,000 → 4.5 (moved 4 places to the left)
So:
45,000 = 4.5 × 104
Example 2: Convert from standard form
Write 3.2 × 103 as an ordinary number.
Multiply 3.2 by 10³:
3.2 × 1000 = 3200
Answer: 3200