Big Number Calculator
Add, subtract, multiply and divide numbers with hundreds of digits — exactly. Standard calculators round or switch to scientific notation; this one uses arbitrary-precision arithmetic and gives the answer down to the last digit.
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How to use
- Enter very big numbers as digits — there is no practical length limit.
- Select the operation.
- You get the exact answer — no rounding and no scientific notation.
Tips
- BigInt handles integers only — decimals and fractions are not supported here.
- There is no practical length limit; paste numbers straight from a spreadsheet.
- For division, results are whole numbers; remainders are dropped.
- Double-check pasted numbers for stray commas or spaces first.
Note: This calculator uses JavaScript BigInt (arbitrary precision integer), so the answer is exact down to the last digit. Decimal (fraction) numbers are not supported here.