What inputs are supported?

Standard decimal numbers (with commas optional) and E-notation like 4.5e-3. You can also paste a ×10^ exponent using ^ or superscript.

What is engineering notation?

Engineering notation is like scientific notation but the exponent is a multiple of 3, so the coefficient aligns with common SI prefixes (k, M, µ, etc.).

Yes. Everything runs locally in your browser. No uploads or tracking of inputs.

Scientific Notation Converter – Scientific ↔ Standard & Engineering

Convert numbers between standard form and scientific notation \(a \times 10^n\), or engineering notation (exponent multiple of 3). 100% client-side.

Enter a number (standard, scientific, or E-notation)

Tips: commas are ignored; use e (e.g., 1.2e5) or ×10^.

Formatting

Results

Standard (decimal):

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Scientific (a × 10^n):

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Engineering (a × 10^n):

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Coefficient (a):

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Exponent (n):

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Significant figures:

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How Scientific & Engineering Notation Work

Scientific notation writes numbers as \(a \times 10^n\) where \(1 \le a < 10\) and \(n\) is an integer. Example: \(5{,}200 = 5.2 \times 10^3\).

Engineering notation is similar, but n must be a multiple of 3 so it lines up with SI prefixes (k, M, G, m, µ, n…). Example: \(0.0047 = 4.7 \times 10^{-3}\) (milli).

Significant figures indicate precision: entering 1.2300 implies 5 sig figs.
E-notation is the computer-friendly form: 3.1e-5 = \(3.1 \times 10^{-5}\).
The converter preserves or applies sig figs according to your selection.

Frequently Asked Questions

How does “auto” sig figs work?

We infer significant figures from your typed number (e.g., trailing zeros after a decimal point count as significant).

What formats can I paste?

Examples: 123000, 0.000031, 6.022×10^23, 4.57 x 10^-3, 4.57e-3.

Is everything private?

Yes — all conversions run in your browser.