precision-math

Perform precise operations on arbitrarily large decimals without the usage of floats.

Leverages native JavaScript BigInt, so should be faster than string manipulation libraries. Allows for unlimited arbitrary digits (up to the absurd limitations of BigInt)

$ npm install --save precision-math

Include the package.

const {add, sub, mult} = require('precision-math');

Do some math!

add('.2', '0.1'); // 0.3
// Trailing 0s are only ever trimmed to the precision of the maximum
// encountered post-decimal digits.
sub('2343.21200', '10.11'); // 2333.10200
mult('.2', '0.100'); // 0.020

// Fun!
mult(
  '84329810756392221989004327891809679902229299040756637438294362784.4328000000011011',
  '50000042242410000043288888282.00000000000000000000421414777',
  '999999999999.99999999'
); // 4216494100114052296988957280801318867457046311073172564636761834886925607535808706713829063214866342509500.32251147080314365825467118279366225165139359801890453