diff --git a/src/CalculationDetail/CalculationDetail.module.css b/src/CalculationDetail/CalculationDetail.module.css
new file mode 100644
index 0000000..17504cb
--- /dev/null
+++ b/src/CalculationDetail/CalculationDetail.module.css
@@ -0,0 +1,55 @@
+.entry {
+    cursor: pointer;
+    display: flex;
+}
+.entry > span {
+    flex: 1;
+}
+.entry > span:first-child {
+    display: inline-block;
+    flex: unset;
+    width: 20px;
+}
+
+.entry > span:last-child {
+    display: inline-block;
+    flex: unset;
+    width: 60px;
+}
+.entry:hover {
+    background-color: #cccccc;
+}
+
+.header {
+    cursor: inherit;
+    font-weight: bold;
+}
+.header:hover {
+    background-color: inherit;
+}
+
+.collapsed {
+    display: none;
+}
+
+.effects {
+    background-color: #cccccc;
+    padding: 10px 20px;
+}
+
+.effect {
+    display: flex;
+}
+.effect > span:nth-child(3) {
+    flex: 1;
+}
+.effect > span:nth-child(1) {
+    width: 40px;
+}
+.effect > span:nth-child(2) {
+    width: 200px;
+}
+
+.line:nth-child(odd) {
+    background-color: #f2f2f2;
+}
diff --git a/src/CalculationDetail/CalculationDetail.stories.tsx b/src/CalculationDetail/CalculationDetail.stories.tsx
new file mode 100644
index 0000000..af660c4
--- /dev/null
+++ b/src/CalculationDetail/CalculationDetail.stories.tsx
@@ -0,0 +1,43 @@
+import type { Decorator, Meta, StoryObj } from '@storybook/react';
+import React from "react";
+
+import { fullFit } from '../../.storybook/fits';
+
+import { DogmaEngineProvider } from '../DogmaEngineProvider';
+import { EveDataProvider  } from '../EveDataProvider';
+import { ShipSnapshotProvider } from '../ShipSnapshotProvider';
+import { CalculationDetail } from './';
+
+const meta: Meta<typeof CalculationDetail> = {
+  component: CalculationDetail,
+  tags: ['autodocs'],
+  title: 'Component/CalculationDetail',
+};
+
+export default meta;
+type Story = StoryObj<typeof CalculationDetail>;
+
+const withShipSnapshotProvider: Decorator<{source: "Ship" | { Item: number }}> = (Story, context) => {
+  return (
+    <EveDataProvider>
+      <DogmaEngineProvider>
+        <ShipSnapshotProvider {...context.parameters.snapshot}>
+          <Story {...context.args} />
+        </ShipSnapshotProvider>
+      </DogmaEngineProvider>
+    </EveDataProvider>
+  );
+}
+
+export const Default: Story = {
+  args: {
+    source: "Ship",
+  },
+  decorators: [withShipSnapshotProvider],
+  parameters: {
+    snapshot: {
+      fit: fullFit,
+      skills: {},
+    }
+  },
+};
diff --git a/src/CalculationDetail/CalculationDetail.tsx b/src/CalculationDetail/CalculationDetail.tsx
new file mode 100644
index 0000000..add5091
--- /dev/null
+++ b/src/CalculationDetail/CalculationDetail.tsx
@@ -0,0 +1,117 @@
+import clsx from "clsx";
+import React from "react";
+
+import { EveDataContext } from "../EveDataProvider";
+import { ShipSnapshotContext, ShipSnapshotItemAttribute, ShipSnapshotItemAttributeEffect } from "../ShipSnapshotProvider";
+
+import styles from "./CalculationDetail.module.css";
+import { Icon } from "../Icon";
+
+const EffectOperatorOrder: Record<string, string> = {
+  "PreAssign": "=",
+  "PreMul": "*",
+  "PreDiv": "/",
+  "ModAdd": "+",
+  "ModSub": "-",
+  "PostMul": "*",
+  "PostDiv": "/",
+  "PostPercent": "%",
+  "PostAssignment": "=",
+};
+
+const Effect = (props: { effect: ShipSnapshotItemAttributeEffect }) => {
+  const eveData = React.useContext(EveDataContext);
+  const shipSnapshot = React.useContext(ShipSnapshotContext);
+
+  const eveAttribute = eveData.dogmaAttributes?.[props.effect.source_attribute_id];
+
+  let sourceName;
+  let attribute;
+  if (props.effect.source === "Ship") {
+    sourceName = "Ship";
+    attribute = shipSnapshot.hull?.attributes.get(props.effect.source_attribute_id);
+  } else if (props.effect.source.Item !== undefined) {
+    const item = shipSnapshot.items?.[props.effect.source.Item];
+    if (item === undefined) {
+      sourceName = "Unknown";
+    } else {
+      sourceName = eveData.typeIDs?.[item?.type_id]?.name;
+      attribute = item?.attributes.get(props.effect.source_attribute_id);
+    }
+  }
+
+  return <div className={styles.effect}>
+    <span>{EffectOperatorOrder[props.effect.operator]}</span>
+    <span>{attribute?.value || eveAttribute?.defaultValue}{props.effect.penalty ? " (penalized)" : ""}</span>
+    <span>{sourceName} - {eveAttribute?.name}</span>
+  </div>;
+}
+
+const CalculationDetailMeta = (props: { attributeId: number, attribute: ShipSnapshotItemAttribute }) => {
+  const [expanded, setExpanded] = React.useState(false);
+  const eveData = React.useContext(EveDataContext);
+
+  const eveAttribute = eveData.dogmaAttributes?.[props.attributeId];
+  let index = 0;
+
+  const sortedEffects = props.attribute.effects.sort((a, b) => {
+    const aIndex = Object.keys(EffectOperatorOrder).indexOf(a.operator);
+    const bIndex = Object.keys(EffectOperatorOrder).indexOf(b.operator);
+    if (aIndex === -1 || bIndex === -1) {
+      return 0;
+    }
+    return aIndex - bIndex;
+  });
+
+  return <div className={styles.line}>
+    <div className={styles.entry} onClick={() => setExpanded(!expanded)}>
+      <span>
+        <Icon name={expanded ? "menu-expand" : "menu-collapse"} />
+      </span>
+      <span>{eveAttribute?.name}</span>
+      <span>{props.attribute.value}</span>
+      <span>{props.attribute.effects.length}</span>
+    </div>
+    <div className={clsx(styles.effects, { [styles.collapsed]: !expanded })}>
+      <div className={styles.effect}>
+        <span>=</span>
+        <span>{props.attribute.base_value}</span>
+        <span>base value {props.attributeId < 0 && <>(list of effects might be incomplete)</>}</span>
+      </div>
+      {sortedEffects.map((effect) => {
+        index += 1;
+        return <Effect key={index} effect={effect} />
+      })}
+    </div>
+  </div>
+}
+
+/**
+ * Show in detail for each attribute how the value came to be. This includes
+ * the base value, all effects (and their source) and the final value.
+ */
+export const CalculationDetail = (props: {source: "Ship" | { Item: number }}) => {
+  const shipSnapshot = React.useContext(ShipSnapshotContext);
+
+  let attributes;
+  if (props.source === "Ship") {
+    attributes = [...shipSnapshot.hull?.attributes.entries() || []];
+  } else if (props.source.Item !== undefined) {
+    const item = shipSnapshot.items?.[props.source.Item];
+    if (item !== undefined) {
+      attributes = [...item.attributes.entries()];
+    }
+  }
+
+  return <div>
+    <div className={clsx(styles.entry, styles.header)}>
+      <span></span>
+      <span>Attribute</span>
+      <span>Value</span>
+      <span>Effects</span>
+    </div>
+    {attributes?.map(([attributeId, attribute]) => {
+      return <CalculationDetailMeta key={attributeId} attributeId={attributeId} attribute={attribute} />
+    })}
+  </div>
+};
diff --git a/src/CalculationDetail/index.ts b/src/CalculationDetail/index.ts
new file mode 100644
index 0000000..1a223d2
--- /dev/null
+++ b/src/CalculationDetail/index.ts
@@ -0,0 +1 @@
+export { CalculationDetail } from "./CalculationDetail";
diff --git a/src/ShipSnapshotProvider/ShipSnapshotProvider.tsx b/src/ShipSnapshotProvider/ShipSnapshotProvider.tsx
index a506f5d..b74947e 100644
--- a/src/ShipSnapshotProvider/ShipSnapshotProvider.tsx
+++ b/src/ShipSnapshotProvider/ShipSnapshotProvider.tsx
@@ -2,12 +2,18 @@ import React from "react";
 
 import { DogmaEngineContext } from '../DogmaEngineProvider';
 
+export interface ShipSnapshotItemAttributeEffect {
+  operator: string,
+  penalty: boolean,
+  source: "Ship" | { Item: number },
+  source_category: string,
+  source_attribute_id: number,
+};
+
 export interface ShipSnapshotItemAttribute {
   base_value: number,
   value: number,
-  effects: {
-    penalty: boolean,
-  }[],
+  effects: ShipSnapshotItemAttributeEffect[],
 };
 
 export interface ShipSnapshotItem {
diff --git a/src/ShipSnapshotProvider/index.ts b/src/ShipSnapshotProvider/index.ts
index 5a30071..c498879 100644
--- a/src/ShipSnapshotProvider/index.ts
+++ b/src/ShipSnapshotProvider/index.ts
@@ -1,2 +1,2 @@
 export { ShipSnapshotContext, ShipSnapshotProvider } from "./ShipSnapshotProvider";
-export type { EsiFit, ShipSnapshotItem, ShipSnapshotItemAttribute } from "./ShipSnapshotProvider";
+export type { EsiFit, ShipSnapshotItem, ShipSnapshotItemAttribute, ShipSnapshotItemAttributeEffect } from "./ShipSnapshotProvider";
diff --git a/src/index.ts b/src/index.ts
index 85bbf75..77e828e 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,4 +1,5 @@
 export * from './DogmaEngineProvider';
+export * from './CalculationDetail';
 export * from './EsiCharacterSelection';
 export * from './EsiProvider';
 export * from './EveDataProvider';