Scientific notation calculator
Write a number as a coefficient multiplied by a power of ten.
How do I use this page?
- Enter values or use the example in the form.
- Choose a mode or units where available.
- Read the result and check the calculation steps below.
What this page does not do: You choose output precision, not measurement accuracy. Calculations use floating-point arithmetic; boundary values may require checking.
Further reading
Theory — what is scientific notation?
Scientific notation writes a number as a coefficient multiplied by a power of ten, so 12345 becomes 1.2345 × 10⁴ and 0.0012 becomes 1.2 × 10⁻³. For any nonzero number the coefficient's absolute value stays between 1 and 10, which makes it easy to compare very large and very small values. The number of significant figures kept in the coefficient determines how the value gets rounded.
Frequently asked questions
How is the result calculated?
What are the limitations?
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