What is the Scientific Notation Converter?

Convert numbers to and from scientific notation with this free scientific notation converter. Enter decimals, e-notation (1.23e-5), or 1.23 × 10^5 format — get normalized scientific notation, Unicode superscripts, engineering notation (exponent multiple of 3), and decimal form. Adjustable significant figures. Perfect for chemistry, physics, and programming. Runs instantly in your browser.

How to use the Scientific Notation Converter

Choose To Scientific, From Scientific, or Engineering Notation mode.
Enter a decimal number, e-notation value, or 1.23 x 10^n expression.
Set significant figures for the mantissa (1–15).
Review scientific, e-notation, engineering, and decimal outputs.
Copy all formats with calculation steps.

Common use cases

Converting Avogadro's number or Planck's constant to standard form
Translating calculator e-notation to textbook scientific notation
Writing engineering notation for resistor or frequency values
Checking homework answers for chemistry and physics
Preparing numbers for spreadsheets or code

Frequently asked questions

What is scientific notation?: Scientific notation writes a number as a × 10^n where 1 ≤ |a| < 10. For example, 1230000 = 1.23 × 10^6. It compactly expresses very large or very small values.
What input formats are accepted?: Decimals (1230000), e-notation (1.23e6, 1.23E-5), and ×10^ forms (1.23 x 10^6, 1.23 × 10^-5). Commas in numbers are stripped automatically.
What is engineering notation?: Engineering notation is like scientific notation but the exponent is always a multiple of 3 (…, -6, -3, 0, 3, 6, …). Example: 299792458 ≈ 299.792 × 10^6. It aligns with metric prefixes (kilo, mega, nano).
What is e-notation?: E-notation is used in programming and calculators: 1.23e6 means 1.23 × 10^6. This tool converts between e-notation and standard scientific form.
How do significant figures work here?: The mantissa is rounded to your chosen number of significant figures (1–15). Default is 6. This affects displayed formats but the full parsed value is used internally.

More Mathematical Tools

Scientific Notation Converter

Convert numbers to and from scientific notation, e-notation, and engineering notation. Enter decimals (299792458), e-notation (1.23e-5), or 1.23 × 10^5 format. Get normalized scientific, Unicode superscript, engineering (×10³), and decimal forms. Adjustable significant figures. Free, browser-based.

What is the Scientific Notation Converter?

Frequently asked questions

What is scientific notation?

Scientific notation writes a number as a × 10^n where 1 ≤ |a| < 10. For example, 1230000 = 1.23 × 10^6. It compactly expresses very large or very small values.

What input formats are accepted?

Decimals (1230000), e-notation (1.23e6, 1.23E-5), and ×10^ forms (1.23 x 10^6, 1.23 × 10^-5). Commas in numbers are stripped automatically.

What is engineering notation?

Engineering notation is like scientific notation but the exponent is always a multiple of 3 (…, -6, -3, 0, 3, 6, …). Example: 299792458 ≈ 299.792 × 10^6. It aligns with metric prefixes (kilo, mega, nano).

What is e-notation?

E-notation is used in programming and calculators: 1.23e6 means 1.23 × 10^6. This tool converts between e-notation and standard scientific form.

How do significant figures work here?

The mantissa is rounded to your chosen number of significant figures (1–15). Default is 6. This affects displayed formats but the full parsed value is used internally.