diff --git a/journal/src/helpers.rs b/journal/src/helpers.rs
index e202e2d..367079a 100644
--- a/journal/src/helpers.rs
+++ b/journal/src/helpers.rs
@@ -1,8 +1,6 @@
-use crate::types::{
-	CustomUnitDose, CustomUnitIngestionDose, Estimation, IngestionDose, StandardIngestionDose,
-};
+use crate::types::{CustomUnitIngestionDose, StandardIngestionDose};
 
-pub fn add_standard_deviation(
+pub fn calculate_standard_deviation(
 	expectation_x: f64,
 	standard_deviation_x: f64,
 	expectation_y: f64,
@@ -24,39 +22,10 @@ pub fn add_standard_deviation(
 
 pub fn calulate_custom_unit_ingestion_dose(
 	dose: &CustomUnitIngestionDose,
-	custom_unit_dose: &CustomUnitDose,
-) -> IngestionDose {
-	let estimation = match (&dose.estimation, &custom_unit_dose.estimation) {
-		(
-			&Estimation::StandardDeviation(dose_standard_deviation),
-			&Estimation::StandardDeviation(custom_unit_standard_deviation),
-		) => {
-			let result = add_standard_deviation(
-				dose.dose,
-				dose_standard_deviation,
-				custom_unit_dose.dose,
-				custom_unit_standard_deviation,
-			);
-			if let Some(result) = result {
-				Estimation::StandardDeviation(result)
-			} else {
-				Estimation::Estimate
-			}
-		}
-		(&Estimation::StandardDeviation(dose_standard_deviation), _) => {
-			Estimation::StandardDeviation(dose_standard_deviation)
-		}
-		(_, &Estimation::StandardDeviation(custom_unit_standard_deviation)) => {
-			Estimation::StandardDeviation(custom_unit_standard_deviation)
-		}
-		(Estimation::Precise, Estimation::Precise) => Estimation::Precise,
-		_ => Estimation::Estimate,
-	};
+	custom_unit_dose: &CustomUnitIngestionDose,
+) -> StandardIngestionDose {
+	let dose: StandardIngestionDose = dose.clone().into();
+	let custom_unit_dose: StandardIngestionDose = custom_unit_dose.clone().into();
 
-	IngestionDose::Standard(StandardIngestionDose {
-		dose: dose.dose * custom_unit_dose.dose,
-		unit: custom_unit_dose.original_unit.clone(),
-		contains_unknown: false,
-		estimation,
-	})
+	custom_unit_dose * dose
 }
diff --git a/journal/src/types.rs b/journal/src/types.rs
index e684d25..6fa5547 100644
--- a/journal/src/types.rs
+++ b/journal/src/types.rs
@@ -1,7 +1,7 @@
 use chrono::{DateTime, TimeZone, Utc};
 use std::collections::HashMap;
 use std::fmt::{Debug, Display};
-use std::ops::Add;
+use std::ops::{Add, Mul};
 use std::str::FromStr;
 
 pub type AdministrationRoute = psychonaut_journal_types::AdministrationRoute;
@@ -42,6 +42,23 @@ impl Add for Estimation {
 	}
 }
 
+impl Mul for Estimation {
+	type Output = Self;
+
+	fn mul(self, rhs: Self) -> Self::Output {
+		match (self, rhs) {
+			(Estimation::StandardDeviation(x), Estimation::StandardDeviation(y)) => {
+				Estimation::StandardDeviation(x * y)
+			}
+			(Estimation::StandardDeviation(x), _) | (_, Estimation::StandardDeviation(x)) => {
+				Estimation::StandardDeviation(x)
+			}
+			(Estimation::Estimate, _) | (_, Estimation::Estimate) => Estimation::Estimate,
+			(Estimation::Precise, Estimation::Precise) => Estimation::Precise,
+		}
+	}
+}
+
 #[derive(Debug, Clone)]
 pub struct UnknownIngestionDose {
 	pub unit: String,
@@ -55,19 +72,6 @@ pub struct StandardIngestionDose {
 	pub estimation: Estimation,
 }
 
-impl Add<UnknownIngestionDose> for StandardIngestionDose {
-	type Output = Self;
-
-	fn add(self, _: UnknownIngestionDose) -> Self::Output {
-		StandardIngestionDose {
-			dose: self.dose,
-			unit: self.unit,
-			contains_unknown: true,
-			estimation: self.estimation,
-		}
-	}
-}
-
 impl Add for StandardIngestionDose {
 	type Output = Self;
 
@@ -81,8 +85,41 @@ impl Add for StandardIngestionDose {
 	}
 }
 
-impl From<CustomUnitDose> for StandardIngestionDose {
-	fn from(value: CustomUnitDose) -> StandardIngestionDose {
+impl Add<UnknownIngestionDose> for StandardIngestionDose {
+	type Output = Self;
+
+	fn add(self, _rhs: UnknownIngestionDose) -> Self::Output {
+		StandardIngestionDose {
+			dose: self.dose,
+			unit: self.unit,
+			contains_unknown: true,
+			estimation: self.estimation,
+		}
+	}
+}
+
+impl Mul for StandardIngestionDose {
+	type Output = Self;
+
+	fn mul(self, rhs: Self) -> Self::Output {
+		StandardIngestionDose {
+			dose: self.dose * rhs.dose,
+			unit: self.unit,
+			contains_unknown: self.contains_unknown || rhs.contains_unknown,
+			estimation: {
+				let estimation = self.estimation + rhs.estimation;
+				if let Estimation::StandardDeviation(deviation) = estimation {
+					Estimation::StandardDeviation(deviation * rhs.dose)
+				} else {
+					estimation
+				}
+			},
+		}
+	}
+}
+
+impl From<CustomUnitIngestionDose> for StandardIngestionDose {
+	fn from(value: CustomUnitIngestionDose) -> StandardIngestionDose {
 		StandardIngestionDose {
 			dose: value.dose,
 			unit: value.original_unit,
@@ -96,6 +133,7 @@ impl From<CustomUnitDose> for StandardIngestionDose {
 pub struct CustomUnitIngestionDose {
 	pub dose: f64,
 	pub unit: String,
+	pub original_unit: String,
 	pub estimation: Estimation,
 	pub custom_unit_id: i64,
 }
@@ -162,14 +200,6 @@ pub struct Experience {
 	pub ingestions: Vec<Ingestion>,
 }
 
-#[derive(Debug, Clone)]
-pub struct CustomUnitDose {
-	pub dose: f64,
-	pub unit: String,
-	pub original_unit: String,
-	pub estimation: Estimation,
-}
-
 #[derive(Debug, Clone)]
 pub struct CustomUnit {
 	pub id: i64,
@@ -177,7 +207,7 @@ pub struct CustomUnit {
 	pub substance_name: String,
 
 	pub administration_route: AdministrationRoute,
-	pub dose: CustomUnitDose,
+	pub dose: CustomUnitIngestionDose,
 
 	pub creation_time: DateTime<Utc>,
 	pub is_archived: bool,
@@ -229,10 +259,11 @@ impl Journal {
 					substance_name: custom_unit.substance_name,
 
 					administration_route: custom_unit.administration_route,
-					dose: CustomUnitDose {
+					dose: CustomUnitIngestionDose {
 						dose: custom_unit.dose,
 						unit: custom_unit.unit,
 						original_unit: custom_unit.original_unit,
+						custom_unit_id: custom_unit.id,
 						estimation: if custom_unit.is_estimate {
 							if let Some(standard_deviation) =
 								custom_unit.estimate_standard_deviation
@@ -285,6 +316,7 @@ impl Journal {
 								IngestionDose::CustomUnit(CustomUnitIngestionDose {
 									dose,
 									unit: custom_unit.dose.unit.clone(),
+									original_unit: custom_unit.dose.original_unit.clone(),
 									estimation,
 									custom_unit_id,
 								})
diff --git a/journal_cli/src/formatting.rs b/journal_cli/src/formatting.rs
index 1ca0c02..439b47d 100644
--- a/journal_cli/src/formatting.rs
+++ b/journal_cli/src/formatting.rs
@@ -1,7 +1,7 @@
 use journal::{
 	helpers::calulate_custom_unit_ingestion_dose,
 	types::{
-		CustomUnit, CustomUnitDose, Estimation, Experience, Ingestion, IngestionDose,
+		CustomUnit, CustomUnitIngestionDose, Estimation, Experience, Ingestion, IngestionDose,
 		StandardIngestionDose,
 	},
 };
@@ -12,7 +12,7 @@ pub fn format_experience_title(experience: &Experience) -> String {
 
 pub fn format_ingestion_dose(
 	dose: &IngestionDose,
-	custom_unit_dose: Option<&CustomUnitDose>,
+	custom_unit_dose: Option<&CustomUnitIngestionDose>,
 ) -> String {
 	match dose {
 		IngestionDose::Unknown(dose) => format!("Unknown {}", dose.unit),
@@ -37,7 +37,8 @@ pub fn format_ingestion_dose(
 
 			let ingestion_dose = calulate_custom_unit_ingestion_dose(dose, custom_unit_dose);
 
-			let ingestion_dose = format_ingestion_dose(&ingestion_dose, None);
+			let ingestion_dose =
+				format_ingestion_dose(&IngestionDose::Standard(ingestion_dose), None);
 
 			let dose_per_unit = format_ingestion_dose(
 				&IngestionDose::Standard(StandardIngestionDose::from(custom_unit_dose.clone())),