diff --git a/src/conversions.rs b/src/conversions.rs
index 963f8a4..9f65182 100644
--- a/src/conversions.rs
+++ b/src/conversions.rs
@@ -6,36 +6,42 @@ struct Conversion {
 }
 
 fn get_conversion(unit: NonMetric) -> Conversion {
+	let inch_from = 10_000.0;
+	let inch_to = 254.0;
+
+	let pound_from = 100_000.0;
+	let pound_to = 45359237.0;
+
 	match unit {
 		// Length
 		NonMetric::Foot => Conversion {
-			from: 10_000.0,
-			to: MetricQuantity { amount: 3048.0, unit: Metric::Metre },
+			from: inch_from,
+			to: MetricQuantity { amount: 12.0 * inch_to, unit: Metric::Metre },
 		},
 		NonMetric::Inch => Conversion {
-			from: 10_000.0,
-			to: MetricQuantity { amount: 254.0, unit: Metric::Metre },
+			from: inch_from,
+			to: MetricQuantity { amount: inch_to, unit: Metric::Metre },
 		},
 		NonMetric::Yard => Conversion {
-			from: 10_000.0,
-			to: MetricQuantity { amount: 9144.0, unit: Metric::Metre },
+			from: inch_from,
+			to: MetricQuantity { amount: 3.0 * 12.0 * inch_to, unit: Metric::Metre },
 		},
 		NonMetric::Mile => Conversion {
-			from: 1_000.0,
-			to: MetricQuantity { amount: 1609344.0, unit: Metric::Metre },
+			from: inch_from,
+			to: MetricQuantity { amount: 1760.0 * 3.0 * 12.0 * inch_to, unit: Metric::Metre },
 		},
 		// Weight
 		NonMetric::Ounce => Conversion {
-			from: 1_000_000_000.0,
-			to: MetricQuantity { amount: 28349523125.0, unit: Metric::Gram },
+			from: 16.0 * pound_from,
+			to: MetricQuantity { amount: pound_to, unit: Metric::Gram },
 		},
 		NonMetric::Pound => Conversion {
-			from: 100_000.0,
-			to: MetricQuantity { amount: 45359237.0, unit: Metric::Gram },
+			from: pound_from,
+			to: MetricQuantity { amount: pound_to, unit: Metric::Gram },
 		},
 		NonMetric::Stone => Conversion {
-			from: 100_000.0,
-			to: MetricQuantity { amount: 635029318.0, unit: Metric::Gram },
+			from: pound_from,
+			to: MetricQuantity { amount: 14.0 * pound_to, unit: Metric::Gram },
 		},
 	}
 }