Math calculators

Scientific Notation Calculator

Updated Sep 1, 2026 By Jehan Wadia
Rate Formulas
Please enter a valid number or scientific notation expression.
Scientific Notation
3.456 × 1011
Scientific E Notation
3.456e11
Engineering Notation
345.6 × 109
Engineering Notation with SI Prefix
345.6 giga (G)
Standard Form (Expanded Decimal)
345600000000
Order of Magnitude
11
Significant Figures
4
Word Form
three hundred forty-five billion six hundred million
Scientific Notation Arithmetic
Invalid number.
Invalid number.
Expression
3.5 × 104 + 2.1 × 103
Result (Scientific Notation)
3.71 × 104
Result (E Notation)
3.71e4
Result (Standard Form)
37100

Introduction

Scientific notation is a way to write very big or very small numbers in a shorter form. Instead of writing out all the zeros, you use a number between 1 and 10 multiplied by a power of 10. For example, 5,000,000 becomes 5 × 106, and 0.003 becomes 3 × 10-3. Scientists, engineers, and math students use this format every day to make numbers easier to read and work with.

This scientific notation calculator helps you convert numbers to and from scientific notation quickly. You can also add, subtract, multiply, and divide numbers that are already in scientific notation. Just enter your values, pick an operation, and get your answer right away. It's a simple tool that saves time and helps you avoid mistakes when working with very large or very small numbers.

How to Use Our Scientific Notation Calculator

Enter a number in standard form or scientific notation, and this calculator will convert it to the other format. You can also perform math operations between two numbers in scientific notation.

Number Input: Type the number you want to convert. You can enter a regular number like 45000 or a number already in scientific notation like 4.5 × 10³. The calculator accepts both formats.

Second Number (Optional): If you want to add, subtract, multiply, or divide two numbers in scientific notation, enter your second number here. Leave this blank if you only need a conversion.

Operation Selector: Pick the math operation you want to perform between your two numbers. Choose from addition, subtraction, multiplication, or division. This only applies when you have entered two numbers.

Result: The calculator will show your answer in proper scientific notation. It will display the coefficient (a number between 1 and 10) multiplied by 10 raised to the correct exponent. The standard form of the number will also be shown so you can see both formats side by side.

What Is Scientific Notation?

Scientific notation is a way to write very large or very small numbers in a shorter form. Instead of writing out all the zeros, you use a number between 1 and 10 multiplied by a power of 10. For example, instead of writing 3,000,000, you can write 3 × 106. Instead of writing 0.00045, you can write 4.5 × 10-4.

How Does Scientific Notation Work?

Every number in scientific notation has two parts: the coefficient and the exponent. The coefficient is the number at the front, and it must be at least 1 but less than 10. The exponent tells you how many places to move the decimal point. A positive exponent means the number is big, and a negative exponent means the number is small (close to zero).

How to Convert to Scientific Notation

To convert a regular number to scientific notation, move the decimal point until you have a number between 1 and 10. Then count how many places you moved it. If you moved the decimal to the left, the exponent is positive. If you moved it to the right, the exponent is negative.

For example, 52,000 becomes 5.2 × 104 because the decimal moved 4 places to the left. And 0.0071 becomes 7.1 × 10-3 because the decimal moved 3 places to the right.

Why Is Scientific Notation Useful?

Scientists, engineers, and mathematicians use scientific notation every day. It makes it easier to work with numbers like the distance between stars, the size of atoms, or the speed of light. Writing these numbers in full form would take up too much space and make math harder to do. Scientific notation keeps things clean and simple, especially when multiplying and dividing large or small numbers. In physics, for instance, calculations involving gravitational force or the E = mc² equation routinely involve extremely large or small values best expressed in scientific notation.

Operations with Scientific Notation

When you multiply numbers in scientific notation, you multiply the coefficients and add the exponents. When you divide, you divide the coefficients and subtract the exponents. For addition and subtraction, the exponents must be the same first, and then you simply add or subtract the coefficients.

Formulas used

Scientific Notation
x = a \times 10^{n}, \quad 1 \le |a| < 10
Engineering Notation
x = a \times 10^{n}, \quad n = 3\lfloor \tfrac{\lfloor \log_{10}|x| \rfloor}{3} \rfloor
Order of Magnitude
n = \lfloor \log_{10}|x| \rfloor
Multiplication (Scientific Notation)
(a \times 10^{m}) \times (b \times 10^{n}) = (a \cdot b) \times 10^{m+n}
Division (Scientific Notation)
(a \times 10^{m}) \div (b \times 10^{n}) = \frac{a}{b} \times 10^{m-n}
Addition / Subtraction (Scientific Notation)
a \times 10^{m} \pm b \times 10^{n} = \left(a \pm b \times 10^{n-m}\right) \times 10^{m}

Frequently asked questions

What is the difference between scientific notation and E notation?

They mean the same thing, just written differently. Scientific notation uses the × symbol and a superscript, like 3.456 × 1011. E notation replaces that with the letter "e," like 3.456e11. E notation is used on calculators and in computer programs because it is easier to type. Both formats represent the exact same number.

What is engineering notation?

Engineering notation is similar to scientific notation, but the exponent is always a multiple of 3 (like 3, 6, 9, 12, etc.). This lines up with common unit prefixes like kilo, mega, and giga. For example, 345,600,000,000 in scientific notation is 3.456 × 1011, but in engineering notation it is 345.6 × 109. Engineers prefer this format because it matches the SI prefix system.

What is the order of magnitude?

The order of magnitude is the power of 10 closest to your number. It tells you roughly how big or small a number is. For example, 345,600,000,000 has an order of magnitude of 11 because it is close to 1011. The calculator finds this by taking the floor of the base-10 logarithm of the absolute value of your number.

How does the Power (A^B) operation work?

When you choose Power (A^B), the calculator raises Number A to the power of Number B. For example, if A is 2e3 (2000) and B is 3, the result is 20003 = 8,000,000,000, which is 8 × 109. B does not have to be a whole number. It can be a decimal or a negative number too.

What happens if I divide by zero in the arithmetic tab?

If Number B is zero and you choose division, the calculator will display "Division by zero" instead of a result. Dividing by zero is undefined in math, so no answer can be given.

What does the Word Form result show?

Word form spells out the number in English words. For example, 345,600,000,000 shows as "three hundred forty-five billion six hundred million." For decimals, it says "point" followed by each digit. This is useful for writing checks, reports, or when you need to read a number out loud.