Calculating gravities, color, IBU, alcohol by volume, and calories for a beer recipe.

gistfile1.html

<script type="text/javascript" src="/scripts/brauhaus.min.js"></script>
<script type="text/javascript">
    // Create a recipe
    var r = new Brauhaus.Recipe({
        name: 'My test brew',
        description: 'A new test beer using Brauhaus.js!',
        batchSize: 20.0,
        boilSize: 10.0
    });

    // Add ingredients
    r.add('fermentable', {
        name: 'Extra pale liquid extract',
        color: 2.5,
        weight: 4.2,
        yield: 78.0
    });

    r.add('spice', {
        name: 'Cascade hops',
        weight: 0.028,
        aa: 5.0,
        use: 'boil',
        form: 'pellet'
    });

    r.add('yeast', {
        name: 'Wyeast 3724 - Belgian Saison',
        type: 'ale',
        form: 'liquid',
        attenuation: 80
    });

    // Calculate values
    r.calculate();

    // Print out calculated values
    console.log('Original Gravity: ' + r.og.toFixed(3));
    console.log('Final Gravity: ' + r.fg.toFixed(3));
    console.log('Color: ' + r.color.toFixed(1) + '&deg; SRM (' + r.colorName() + ')');
    console.log('IBU: ' + r.ibu.toFixed(1));
    console.log('Alcohol: ' + r.abv.toFixed(1) + '% by volume');
    console.log('Calories: ' + Math.round(r.calories) + ' kcal');
</script>