diff --git a/packages/dimensional/src/attribute.ts b/packages/dimensional/src/attribute.ts
index 81d5d49..cac3623 100644
--- a/packages/dimensional/src/attribute.ts
+++ b/packages/dimensional/src/attribute.ts
@@ -10,7 +10,8 @@ export namespace Attribute {
     export type Name = Dimension.Name
         | 'area' | 'volume'
         | 'velocity' | 'acceleration'
-        | 'force' | 'energy' | 'power';
+        | 'force' | 'energy' | 'power'
+        | 'pressure' | 'flow' | 'viscosity';
     /**
      * Is an object containing keys of attributes and values of nonzero exponents.
      */
@@ -98,6 +99,9 @@ export namespace Attribute {
         force: () => new Attribute({ mass: 1, acceleration: 1 }, 'F'),
         energy: () => new Attribute({ force: 1, length: 1 }, 'E'), // Same as mv^2, mgh, ...
         power: () => new Attribute({ energy: 1, time: -1 }, 'P'),
+        pressure: () => new Attribute({ force: 1, area: -1 }, 'P'),
+        flow: () => new Attribute({ volume: 1, time: -1 }, 'Q'),
+        viscosity: () => new Attribute({ pressure: 1, time: -1 }, '\\mu'),
     };
     /**
      * Represents a dimensionless attribute.
diff --git a/packages/dimensional/src/conversion.ts b/packages/dimensional/src/conversion.ts
index 40adc96..6190b6f 100644
--- a/packages/dimensional/src/conversion.ts
+++ b/packages/dimensional/src/conversion.ts
@@ -82,6 +82,7 @@ export namespace Conversion {
         micron: () => Conversion.scaled('micro', 'meter'),
         millimeter: () => Conversion.scaled('milli', 'meter'),
         centimeter: () => Conversion.scaled('centi', 'meter'),
+        decimeter: () => Conversion.scaled('deci', 'meter'),
         meter: () => Conversion.simple('\\text{m}', 'length'),
         kilometer: () => Conversion.scaled('kilo', 'meter'),
         inch: () => Conversion.relative('\\text{in}', 1 / 12, 'foot'),
@@ -106,10 +107,29 @@ export namespace Conversion {
         mole: () => Conversion.simple('\\text{mol}', 'substance'),
         candela: () => Conversion.simple('\\text{cd}', 'intensity'),
         lumen: () => Conversion.relative('\\text{lm}', 4 * Math.PI, 'candela'),
+        milliliter: () => Conversion.scaled('milli', 'liter'),
+        liter: () => Conversion.complex('\\text{L}', { decimeter: 3 }),
+        gallon: () => Conversion.relative('\\text{gal}', 3.7854, 'liter'),
         Newton: () => Conversion.complex('\\text{N}', { kilogram: 1, meter: 1, second: -2 }),
         kiloNewton: () => Conversion.scaled('kilo', 'Newton'),
         pound_force: () => Conversion.complex('\\text{lb}_{f}', { slug: 1, foot: 1, second: -2 }),
         Joule: () => Conversion.complex('\\text{J}', { Newton: 1, meter: 1 }),
+        calorie: () => Conversion.relative('\\text{cal}', 1, 'Joule'),
+        Calorie: () => Conversion.relative('\\text{Cal}', 1000, 'calorie'),
+        WattHour: () => Conversion.complex('\\text{Wh}', { Watt: 1, hour: -1 }),
+        kiloWattHour: () => Conversion.scaled('kilo', 'WattHour'),
+        BritishThermalUnit: () => Conversion.relative('\\text{BTU}', 1055.056, 'Joule'),
         Watt: () => Conversion.complex('\\text{W}', { Joule: 1, second: -1 }),
+        Pascal: () => Conversion.complex('\\text{Pa}', { Newton: 1, meter: -2 }),
+        kiloPascal: () => Conversion.scaled('kilo', 'Pascal'),
+        atmosphere: () => Conversion.relative('\\text{atm}', 101.325, 'kiloPascal'),
+        millibar: () => Conversion.scaled('milli', 'bar'),
+        bar: () => Conversion.relative('\\text{bar}', 100, 'kiloPascal'),
+        mmHg: () => Conversion.relative('\\text{mmHg}', 7.5, 'kiloPascal'),
+        pounds_per_square_inch: () => Conversion.complex('\\text{psi}', { pound_force: 1, inch: -2 }),
+        poise: () => Conversion.complex('\\text{P}', { gram: 1, centimeter: -1, second: -1 }),
+        centipoise: () => Conversion.scaled('centi', 'poise'),
+        stoke: () => Conversion.complex('\\text{St}', { centimeter: 2, second: -1 }),
+        centistoke: () => Conversion.scaled('centi', 'stoke'),
     };
 }
\ No newline at end of file
diff --git a/packages/dimensional/src/unit.ts b/packages/dimensional/src/unit.ts
index 9215dc8..45c6157 100644
--- a/packages/dimensional/src/unit.ts
+++ b/packages/dimensional/src/unit.ts
@@ -12,7 +12,7 @@ export namespace Unit {
         // Time span/duration
         | 'nanosecond' | 'millisecond' | 'second' | 'minute' | 'hour' | 'day' | 'week' | 'month' | 'year'
         // Length/distance
-        | 'nanometer' | 'micrometer' | 'micron' | 'millimeter' | 'centimeter' | 'meter' | 'kilometer' | 'inch' | 'foot' | 'yard' | 'mile'
+        | 'nanometer' | 'micrometer' | 'micron' | 'millimeter' | 'centimeter' | 'decimeter' | 'meter' | 'kilometer' | 'inch' | 'foot' | 'yard' | 'mile'
         // Mass
         | 'milligram' | 'gram' | 'kilogram' | 'tonne' | 'ounce' | 'pound_mass' | 'slug' | 'stone' | 'shortton'
         // Current
@@ -23,12 +23,18 @@ export namespace Unit {
         | 'mole'
         // Luminous Intensity
         | 'candela' | 'lumen'
+        // Volume
+        | 'milliliter' | 'liter' | 'gallon'
         // Force
         | 'Newton' | 'kiloNewton' | 'pound_force'
         // Energy
-        | 'Joule'
+        | 'Joule' | 'calorie' | 'Calorie' | 'WattHour' | 'kiloWattHour' | 'BritishThermalUnit'
         // Power
         | 'Watt'
+        // Pressure
+        | 'Pascal' | 'kiloPascal' | 'atmosphere' | 'millibar' | 'bar' | 'mmHg' | 'pounds_per_square_inch'
+        // Viscosity
+        | 'poise' | 'centipoise' | 'stoke' | 'centistoke'
         // Trailing semicolon
         ;
     /**