diff --git a/README.md b/README.md
index c87068e..49c2a58 100644
--- a/README.md
+++ b/README.md
@@ -242,6 +242,8 @@ Beer::maltColorUnit(Weight $weight, Color $color, Volume $volume): float
 International Bitterness Units (IBU) is the bitterness of the beer based on the alpha acid of the
 hops, weight of the hops, time in the boil, gravity of the wort, and volume of the wort.
 
+Based off Palmer's Calculation
+
 ```php
 Beer::internationalBitternessUnits(float $alphaAcid, Weight $weight, Time $time, Gravity $gravity, Volume $volume)
 ```
@@ -301,7 +303,7 @@ Beer::hopUtilization(Time $time, Gravity $gravity)
 
 #### Calories
 
-Determines th number of calories in a beer based on the original gravity, final gravity and the volume of the
+Determines the number of calories in a finished beer based on the original gravity, final gravity and the volume of the
 beer consumed.
 
 ```php
diff --git a/src/Calculate/Beer.php b/src/Calculate/Beer.php
index bc6d44f..3f32cae 100644
--- a/src/Calculate/Beer.php
+++ b/src/Calculate/Beer.php
@@ -36,6 +36,8 @@ public static function standardReferenceMethod(Weight $weight, Color $color, Vol
     }
 
     /**
+     * Malt Color Unit (MCU)
+     *
      * Malt Color Unit (MCU) is an equation that helps determine what color a beer would be.
      *
      * @param \Unitz\Weight $weight
@@ -54,7 +56,11 @@ public static function maltColorUnit(Weight $weight, Color $color, Volume $volum
     }
 
     /**
-     * IBU
+     * International Bitterness Units (IBU)
+     *
+     * International Bitterness Units (IBU) is the bitterness of the beer based on the alpha acid of the
+     * hops, weight of the hops, time in the boil, gravity of the wort, and volume of the wort.
+     *
      * Based off Palmer's Calculation
      *
      * @param float $alphaAcid
@@ -82,7 +88,9 @@ public static function internationalBitternessUnits(
     }
 
     /**
-     * AAU
+     * Alpha Acid Units (AAU)
+     *
+     * Alpha Acid Units (AAU) is the potential bitterness of the hops based on the alpha acid and weight.
      *
      * @param float $alphaAcid
      * @param \Unitz\Weight $weight
@@ -94,6 +102,11 @@ public static function alphaAcidUnit(float $alphaAcid, Weight $weight): float
     }
 
     /**
+     * Hop Utilization
+     *
+     * This is a hop utilization factor based on the Tinseth formula derived
+     * by [Glenn Tinseth](https://beersmith.com/blog/2011/02/10/beer-bitterness-and-ibus-with-glenn-tinseth-bshb-podcast-9/]).
+     *
      * @param \Unitz\Time $time
      * @param \Unitz\Gravity $gravity
      * @return float
@@ -105,7 +118,10 @@ public static function hopUtilization(Time $time, Gravity $gravity): float
     }
 
     /**
-     * Calories per Volume.
+     * Calories
+     *
+     * Determines the number of calories in a finished beer based on the original gravity, final gravity and the volume of the
+     * beer consumed.
      *
      * @param \Unitz\Gravity $originalGravity
      * @param \Unitz\Gravity $finalGravity
@@ -205,7 +221,7 @@ public static function apparentDegreeOfFermentation(Gravity $originalGravity, Gr
     }
 
     /**
-     * Gravity Correction based on Temperature of Sample and Hydrometer Calibration
+     * Gravity Correction based on the Sample Temperature, Sample Gravity and Hydrometer Calibration Temperature
      * Source: https://www.brewersfriend.com/hydrometer-temp/
      *
      * @param \Unitz\Temperature $sampleTemperature