What input formats are accepted?

You can type plain numbers (0.00045), E notation (4.5e-4), or the written form with a multiplication sign and exponent such as 4.5 x 10^-4 or 4.5×10^-4. Commas are ignored.

What is the difference between scientific and engineering notation?

Scientific notation keeps exactly one digit before the decimal point (1.23 × 10^8). Engineering notation restricts the exponent to a multiple of 3 (123 × 10^6), which lines up with SI prefixes like kilo, mega, and micro.

How precise are the results?

Calculations use standard double-precision floating point, which holds about 15–17 significant digits. Very long exact decimals may be rounded, and numbers beyond about 1.8 × 10^308 overflow.

Is my input sent anywhere?

No. Everything is calculated locally in your browser — nothing is transmitted or stored.

SCIENTIFIC NOTATION CALCULATOR

Add, subtract, multiply, and divide in scientific notation, and convert between notations. Nothing leaves your browser.

First number

Operation

Second number

Significant figures (optional)

Result

Scientific: 1.8059999999999999 × 10^22
Engineering: 18.06 × 10^21
E notation: 1.8059999999999999e22
Decimal: 18059999999999999000000

First number in every notation

Scientific: 6.02 × 10^23
Engineering: 602 × 10^21
E notation: 6.02e23
Decimal: 602000000000000000000000

How to use the scientific notation calculator

1
Enter the first number as 6.02e23, 1.5 x 10^3, or a plain number.
2
Choose add, subtract, multiply, or divide and enter the second number.
3
Optionally set the significant figures to round the output.
4
Copy the result from scientific, engineering, E notation, or decimal form.

Questions

What input formats are accepted?: You can type plain numbers (0.00045), E notation (4.5e-4), or the written form with a multiplication sign and exponent such as 4.5 x 10^-4 or 4.5×10^-4. Commas are ignored.
What is the difference between scientific and engineering notation?: Scientific notation keeps exactly one digit before the decimal point (1.23 × 10^8). Engineering notation restricts the exponent to a multiple of 3 (123 × 10^6), which lines up with SI prefixes like kilo, mega, and micro.
How precise are the results?: Calculations use standard double-precision floating point, which holds about 15–17 significant digits. Very long exact decimals may be rounded, and numbers beyond about 1.8 × 10^308 overflow.
Is my input sent anywhere?: No. Everything is calculated locally in your browser — nothing is transmitted or stored.