Big Number Calculator
Exact arithmetic on very large or very precise numbers: + − × ÷, powers, square roots, factorials, mod, GCD and LCM.
Change the values and press Calculate to work out your own figures.
Enter X (and Y), choose an operation and the decimal places.
Show the working
- X × Y
How to use it
Enter X (and Y), choose an operation and the decimal places.
Number boxes accept whole numbers, decimals, fractions (3/4), powers (2^10), roots (sqrt(2)) and the constants pi and e. Show the working lists the steps.
Key facts
Exact integer arithmetic; X ÷ Y and √X rounded to the chosen decimals
Names of big numbers
10⁶ million, 10⁹ billion, 10¹² trillion … 10¹⁰⁰ is a googol.
Questions
How big can numbers be?
Results up to 100,000 digits; 10,000! has 35,660.
Is X mod Y ever negative?
No: the remainder is from 0 up to |Y| − 1.
Formulas
Exact integer arithmetic; X ÷ Y and √X rounded to the chosen decimals
Sources
Limitations
- Expressions up to 500 characters; matrices up to 10 × 10.
- Big-number results up to 100,000 digits; factorials up to 10,000!.
- Numbers in words up to 10^102 (short scale).