Scientific Notation Converter
Turn a decimal number into scientific notation, a × 10ⁿ, and convert it back again, with E-notation shown too. It handles very large and very small numbers cleanly. A free scientific notation converter that runs in your browser, with no sign-up.
- Exact, step-by-step answers
- 100% free
- No sign-up, no app
- Instant as you type
- Works offline after first load
How to use it
- 1
Enter your number
Type a plain decimal to convert it to scientific notation, or type a value in a × 10ⁿ form to convert it back.
- 2
Read both forms
See the number in scientific notation and as a plain decimal, with the E-notation version shown alongside.
- 3
Use the result
Copy whichever form you need, whether that is the compact a × 10ⁿ or the full decimal.
When it comes in handy
Science and engineering
Express very large or very small measurements compactly, such as distances in space or sizes in chemistry.
Reading calculator output
Turn an E-notation result like 1.5E−7 back into a plain decimal you can read at a glance.
Homework and exams
Convert between standard form and ordinary numbers, with the exponent worked out for you.
Instant, exact & 100% in your browser
The maths runs right here in your browser, with fractions and whole numbers kept exact rather than rounded along the way. Nothing you type is sent to a server, there is no sign-up and no limit, and once the page has loaded it keeps working even with no connection.
Frequently asked questions
- What is scientific notation?
- Scientific notation writes a number as a coefficient between 1 and 10 multiplied by a power of ten, such as 4500 written as 4.5 × 10³. It keeps very large and very small numbers short and easy to compare.
- How do you convert a number to scientific notation?
- Move the decimal point until one non-zero digit sits in front of it, then count how many places you moved. Moving left gives a positive exponent and moving right gives a negative one. So 0.00072 becomes 7.2 × 10⁻⁴. The converter does the counting for you.
- What is E-notation?
- E-notation is how calculators and computers write scientific notation, with E standing in for times ten to the power. So 6.02 × 10²³ appears as 6.02E23. The converter shows this form alongside the standard one.
- Does this work offline and is anything sent to a server?
- The calculation runs entirely in your browser, so nothing you type is sent anywhere, and once the page has loaded it keeps working with no connection. There is no sign-up and no limit on how many calculations you make.
More tools
More from the Hivly network
Free sister tools on our other sites.