Scientific notation converter
Express a decimal in scientific or engineering notation with chosen significant figures.
Your inputs
The editable example is illustrative. Enter your own dimensions, operating data, prices, and fees. Results update as you edit.
Calculations run in your browser. Inputs are not saved or sent to analytics.
How it works
- Scientific notation: a × 10^e, 1 ≤ abs(a) < 10; Engineering notation: e ∈ 3ℤ; Settlement rounding: 0.5 → 1; abs(e) ≤ 300
- Worked example: 12,345 = 1.2345 × 10^4 = 12.345 × 10^3; 9.995 ⇒ 1.00 × 10^1 (3 )
- Supported input limits: : n ≤ 1,024; : 1 ≤ x ≤ 15
Input and formula key
Your result
Complete the inputs to see your result.
Assumptions and limitations
The chosen significant figures round the value, not the number of decimal places. Engineering notation uses exponents divisible by three. Scientific, engineering and expanded decimal outputs represent the same rounded value, so this is not a lossless transcription tool.
Sources
- OpenStax — scientific notation Sources reviewed: 2026-10-06
