ffee
All tools
Hex Calculator
Add, subtract, multiply and divide hexadecimal numbers and check the decimal value of every result.
Hex Calculator
Working: —
Result in base 16: —
Decimal check: —
How to use the Hex Calculator
- Enter the first hexadecimal value in the top box.
- Pick the operation and enter the second hexadecimal value.
- Read the base 16 result and its decimal equivalent below.
Features
- Add, subtract, multiply and divide in base 16
- Accepts digits 0 to 9 and letters a to f
- Fractional hex values such as ff.8
- Decimal equivalent for every operand and result
Advertisement
Frequently Asked Questions
Common questions about the free online hex calculator.
Enter both values and set the operation to Add. The sum is shown in base 16 with its decimal
equivalent.
Use the digits 0 to 9 and the letters a to f, in either upper or lower case, for the values
ten to fifteen.
Yes. If the second value is larger the result is negative and is shown with a leading minus
sign.
Yes. Choose Multiply and the exact product is shown in base 16 and in decimal.
It does. Division is carried out to the fraction digit count you choose and says clearly when
it rounded.
Yes. Use a point such as ff.8, which is 255.5 in decimal.
The decimal check line shows the value of each operand and of the result in base ten.
The arithmetic uses exact big integers, so values of dozens of hex digits remain correct.
Yes. The calculator is fully responsive and works on phones, tablets and desktop browsers.
Yes. All calculations run locally and nothing you type is uploaded anywhere.
Last updated: October 10, 2026