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Big Numbers Calculator
JavaScript numbers lose precision beyond about 15 significant digits, so ordinary calculators quietly give wrong answers for very large values. This tool works on the digits as strings, which keeps the result exact.
How it works
First number
Second number
Operation
Number of decimal places in the result
Result
Digits in the result
Named scale
Comparison
Note
Frequently asked questions
How do I use the Big Numbers Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.