README

Abivia Money is a compact, fluent library that implements correct rounding logic, with the option to fall back to BCMath's truncation mode. Money instances are immutable.

Money implements the BCMath functions essential for financial calculations, along with other useful functions ceil, floor, max, min, and round.

Money objects can retain individual scale values. If an operation is performed on two objects with different scale values, the result will retain the higher precision.

The Rounding Problem

Example: $35.04 / 1.15 = $30.469565217

When working with currencies there are no fractional cents. This should be rounded to 30.47. But

echo bcdiv('35.04', '1.15', 2);

30.46

That's a rounding error of .95 cents instead of 0.05 cents. Not a big deal for a dozen calculations but made a million times, that's a difference of $900,000.

use Abivia\Money;

Money::setScale(2);
echo Money::make('35.04')->div('1.15');

30.47