We use cookies.This website uses essential cookies to operate core features. With your consent, we also use analytics cookies to understand traffic and improve the service. For more details, see our .
We use cookies.This website uses essential cookies to operate core features. With your consent, we also use analytics cookies to understand traffic and improve the service. For more details, see our .
Was this tool helpful to use?
Your feedback helps us make it better
Fast and free online scientific notation converter. Easily convert between scientific notation and standard numbers with customizable precision and significant figures.
Supports positive/negative decimals, integers, and scientific notation with e/E (e.g., 1.23e5).
Set the number of significant figures for the coefficient, range 1 to 16.
Standard scientific notation expresses numbers as a × 10ⁿ, where 1 ≤ |a| < 10.
Engineering notation always uses exponents that are multiples of 3, simplifying conversions with units like kilo, mega, nano.
E-notation (e.g., 1.23e+5) is common in programming, Excel, etc., for easy copy-pasting.
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
Scientific notation writes a value as a coefficient multiplied by a power of ten. For example, 123,000 is 1.23 × 105, while 0.000123 is 1.23 × 10−4. The exponent tells how many places the decimal point shifts; a positive exponent expands a value and a negative exponent makes it smaller. In E notation, the same first value is written 1.23e5.
This converter accepts a number and displays scientific notation, E notation, engineering notation, and an expanded decimal form. Engineering notation uses exponents that are multiples of three, which can make it convenient alongside metric prefixes. The significant-figure setting controls the coefficient precision in scientific and engineering displays.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Use ordinary digits and a decimal point, or enter an exponent with e or E, such as 6.022e23 or 1.2E-5. You can also use a multiplication sign and a power of ten, such as 1.23 × 10^5.
Choose a target format or use automatic detection when the input format is clear. Review the resulting scientific, E, engineering, and decimal forms.
Choose from 1 to 16 significant figures; the initial setting is 6. For example, 0.000987 at 3 significant figures is 9.87 × 10−4, 9.87e-4, or 987 × 10−6. Its expanded decimal remains 0.000987.
Use E notation in plain-text contexts, the power-of-ten form in a report, or engineering notation when grouping powers of ten by thousands.
When checking an output, verify both the coefficient and exponent sign. For a negative exponent, move the decimal point left; for a positive exponent, move it right.
Use cases
See how the tool fits into real work and everyday tasks.
A lab note with very small measurements can be easier to scan in scientific notation than in a row of leading zeroes. A code field that expects text may be easier to fill with E notation. A technical table that groups values by thousands may benefit from engineering notation. The same numeric value can be expressed in each form without changing its mathematical magnitude.
Significant figures communicate the displayed precision; they do not add accuracy to the original measurement. If a reading was recorded to three significant figures, displaying more digits in a converted coefficient does not create new measurement information. Keep the original value and follow the reporting rules for your class, lab, or publication.
Q&A
Find concise answers to common questions and confusing cases.
No. In this input format, both indicate a power of ten: 1.5e3 and 1.5E3 represent 1,500.
That convention groups powers of ten by thousands, such as 10−6, 10−3, and 103, and often pairs naturally with metric prefixes.
It controls the coefficient shown in scientific and engineering notation. The expanded decimal output represents the parsed value and is not shortened by that setting.
Notes
Review scope, result limitations, and important precautions before use.
Enter one value using half-width digits, an optional sign, a decimal point, and an optional e/E exponent. Comma-grouped values are not supported. The exponent magnitude is limited to 308, and the numeric range and precision of standard JavaScript numbers also apply. Rounding the displayed coefficient can change its final digit. Use the result for format conversion and reading; retain source measurements and use suitable arbitrary-precision software when exact high-precision arithmetic is required.
Related
Discover related tools, collections, and available API capabilities.