Enter a number in decimal or E-notation (e.g., 1.23e-5 or 1.23×10^−5). Choose significant figures if you want rounding. Everything runs in your browser.
Convert a number
Rounding is to chosen significant figures.
Results
Normalized a × 10ⁿ
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Quick math (normalized output)
Result (a × 10ⁿ)
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Notes
We accept decimal, E-notation (e.g., 1.2e-5), or “×10^n” style input. Example: 4.7×10^3.
Rounding uses significant figures. JavaScript doubles are accurate to ~15–16 sig figs. For extreme magnitudes the “full decimal” string is approximate.
Engineering notation snaps the exponent to a multiple of 3 and adjusts the mantissa accordingly.