diff --git a/components.d.ts b/components.d.ts
index 1eb39cae..ea9386b1 100644
--- a/components.d.ts
+++ b/components.d.ts
@@ -13,6 +13,7 @@ declare module '@vue/runtime-core' {
     About: typeof import('./src/pages/About.vue')['default']
     App: typeof import('./src/App.vue')['default']
     AsciiTextDrawer: typeof import('./src/tools/ascii-text-drawer/ascii-text-drawer.vue')['default']
+    AspectRatioCalculator: typeof import('./src/tools/aspect-ratio-calculator/aspect-ratio-calculator.vue')['default']
     'Base.layout': typeof import('./src/layouts/base.layout.vue')['default']
     Base64FileConverter: typeof import('./src/tools/base64-file-converter/base64-file-converter.vue')['default']
     Base64StringConverter: typeof import('./src/tools/base64-string-converter/base64-string-converter.vue')['default']
@@ -89,17 +90,28 @@ declare module '@vue/runtime-core' {
     HttpStatusCodes: typeof import('./src/tools/http-status-codes/http-status-codes.vue')['default']
     IbanValidatorAndParser: typeof import('./src/tools/iban-validator-and-parser/iban-validator-and-parser.vue')['default']
     'IconMdi:brushVariant': typeof import('~icons/mdi/brush-variant')['default']
+    'IconMdi:contentCopy': typeof import('~icons/mdi/content-copy')['default']
     'IconMdi:kettleSteamOutline': typeof import('~icons/mdi/kettle-steam-outline')['default']
+    IconMdiArrowDown: typeof import('~icons/mdi/arrow-down')['default']
+    IconMdiArrowRightBottom: typeof import('~icons/mdi/arrow-right-bottom')['default']
+    IconMdiCamera: typeof import('~icons/mdi/camera')['default']
     IconMdiChevronDown: typeof import('~icons/mdi/chevron-down')['default']
     IconMdiChevronRight: typeof import('~icons/mdi/chevron-right')['default']
     IconMdiClose: typeof import('~icons/mdi/close')['default']
     IconMdiContentCopy: typeof import('~icons/mdi/content-copy')['default']
+    IconMdiDeleteOutline: typeof import('~icons/mdi/delete-outline')['default']
+    IconMdiDownload: typeof import('~icons/mdi/download')['default']
     IconMdiEye: typeof import('~icons/mdi/eye')['default']
     IconMdiEyeOff: typeof import('~icons/mdi/eye-off')['default']
     IconMdiHeart: typeof import('~icons/mdi/heart')['default']
+    IconMdiPause: typeof import('~icons/mdi/pause')['default']
+    IconMdiPlay: typeof import('~icons/mdi/play')['default']
+    IconMdiRecord: typeof import('~icons/mdi/record')['default']
+    IconMdiRefresh: typeof import('~icons/mdi/refresh')['default']
     IconMdiSearch: typeof import('~icons/mdi/search')['default']
     IconMdiTranslate: typeof import('~icons/mdi/translate')['default']
     IconMdiTriangleDown: typeof import('~icons/mdi/triangle-down')['default']
+    IconMdiVideo: typeof import('~icons/mdi/video')['default']
     InputCopyable: typeof import('./src/components/InputCopyable.vue')['default']
     IntegerBaseConverter: typeof import('./src/tools/integer-base-converter/integer-base-converter.vue')['default']
     Ipv4AddressConverter: typeof import('./src/tools/ipv4-address-converter/ipv4-address-converter.vue')['default']
@@ -127,18 +139,40 @@ declare module '@vue/runtime-core' {
     MenuLayout: typeof import('./src/components/MenuLayout.vue')['default']
     MetaTagGenerator: typeof import('./src/tools/meta-tag-generator/meta-tag-generator.vue')['default']
     MimeTypes: typeof import('./src/tools/mime-types/mime-types.vue')['default']
+    NAlert: typeof import('naive-ui')['NAlert']
     NavbarButtons: typeof import('./src/components/NavbarButtons.vue')['default']
+    NCheckbox: typeof import('naive-ui')['NCheckbox']
     NCode: typeof import('naive-ui')['NCode']
     NCollapseTransition: typeof import('naive-ui')['NCollapseTransition']
+    NColorPicker: typeof import('naive-ui')['NColorPicker']
     NConfigProvider: typeof import('naive-ui')['NConfigProvider']
+    NDatePicker: typeof import('naive-ui')['NDatePicker']
+    NDivider: typeof import('naive-ui')['NDivider']
+    NDynamicInput: typeof import('naive-ui')['NDynamicInput']
     NEllipsis: typeof import('naive-ui')['NEllipsis']
+    NForm: typeof import('naive-ui')['NForm']
+    NFormItem: typeof import('naive-ui')['NFormItem']
+    NGi: typeof import('naive-ui')['NGi']
+    NGrid: typeof import('naive-ui')['NGrid']
     NH1: typeof import('naive-ui')['NH1']
+    NH2: typeof import('naive-ui')['NH2']
     NH3: typeof import('naive-ui')['NH3']
     NIcon: typeof import('naive-ui')['NIcon']
+    NImage: typeof import('naive-ui')['NImage']
+    NInputGroup: typeof import('naive-ui')['NInputGroup']
+    NInputGroupLabel: typeof import('naive-ui')['NInputGroupLabel']
+    NInputNumber: typeof import('naive-ui')['NInputNumber']
     NLayout: typeof import('naive-ui')['NLayout']
     NLayoutSider: typeof import('naive-ui')['NLayoutSider']
     NMenu: typeof import('naive-ui')['NMenu']
+    NProgress: typeof import('naive-ui')['NProgress']
     NScrollbar: typeof import('naive-ui')['NScrollbar']
+    NSlider: typeof import('naive-ui')['NSlider']
+    NSpin: typeof import('naive-ui')['NSpin']
+    NStatistic: typeof import('naive-ui')['NStatistic']
+    NSwitch: typeof import('naive-ui')['NSwitch']
+    NTable: typeof import('naive-ui')['NTable']
+    NTag: typeof import('naive-ui')['NTag']
     NumeronymGenerator: typeof import('./src/tools/numeronym-generator/numeronym-generator.vue')['default']
     OtpCodeGeneratorAndValidator: typeof import('./src/tools/otp-code-generator-and-validator/otp-code-generator-and-validator.vue')['default']
     PasswordStrengthAnalyser: typeof import('./src/tools/password-strength-analyser/password-strength-analyser.vue')['default']
diff --git a/src/tools/aspect-ratio-calculator/aspect-ratio-calculator.service.test.ts b/src/tools/aspect-ratio-calculator/aspect-ratio-calculator.service.test.ts
new file mode 100644
index 00000000..0bac921e
--- /dev/null
+++ b/src/tools/aspect-ratio-calculator/aspect-ratio-calculator.service.test.ts
@@ -0,0 +1,71 @@
+// aspect-ratio-calculator.service.test.ts
+
+import { describe, expect, it } from 'vitest';
+import {
+  type AspectRatio,
+  type Dimensions,
+  calculateAspectRatio,
+  calculateDimensions,
+  simplifyRatio,
+} from './aspect-ratio-calculator.service';
+
+describe('Aspect Ratio Calculator Service', () => {
+  describe('calculateAspectRatio', () => {
+    it('calculates correct aspect ratio for 1920x1080', () => {
+      const result = calculateAspectRatio(1920, 1080);
+      expect(result).toEqual({ r1: 16, r2: 9 });
+    });
+
+    it('calculates correct aspect ratio for 640x480', () => {
+      const result = calculateAspectRatio(640, 480);
+      expect(result).toEqual({ r1: 4, r2: 3 });
+    });
+
+    it('handles square aspect ratio', () => {
+      const result = calculateAspectRatio(1000, 1000);
+      expect(result).toEqual({ r1: 1, r2: 1 });
+    });
+  });
+
+  describe('calculateDimensions', () => {
+    it('calculates correct height given width and 16:9 ratio', () => {
+      const ratio: AspectRatio = { r1: 16, r2: 9 };
+      const result = calculateDimensions(1920, ratio, true);
+      expect(result).toEqual({ width: 1920, height: 1080 });
+    });
+
+    it('calculates correct width given height and 4:3 ratio', () => {
+      const ratio: AspectRatio = { r1: 4, r2: 3 };
+      const result = calculateDimensions(480, ratio, false);
+      expect(result).toEqual({ width: 640, height: 480 });
+    });
+
+    it('handles 1:1 ratio', () => {
+      const ratio: AspectRatio = { r1: 1, r2: 1 };
+      const result = calculateDimensions(500, ratio, true);
+      expect(result).toEqual({ width: 500, height: 500 });
+    });
+  });
+
+  describe('simplifyRatio', () => {
+    it('simplifies 16:9 ratio', () => {
+      const result = simplifyRatio(16, 9);
+      expect(result).toEqual({ r1: 16, r2: 9 });
+    });
+
+    it('simplifies 1920:1080 to 16:9', () => {
+      const result = simplifyRatio(1920, 1080);
+      expect(result).toEqual({ r1: 16, r2: 9 });
+    });
+
+    it('simplifies 4:2 to 2:1', () => {
+      const result = simplifyRatio(4, 2);
+      expect(result).toEqual({ r1: 2, r2: 1 });
+    });
+
+    it('handles already simplified ratios', () => {
+      const result = simplifyRatio(7, 5);
+      expect(result).toEqual({ r1: 7, r2: 5 });
+    });
+  });
+});
diff --git a/src/tools/aspect-ratio-calculator/aspect-ratio-calculator.service.ts b/src/tools/aspect-ratio-calculator/aspect-ratio-calculator.service.ts
new file mode 100644
index 00000000..6161bdcc
--- /dev/null
+++ b/src/tools/aspect-ratio-calculator/aspect-ratio-calculator.service.ts
@@ -0,0 +1,44 @@
+// aspect-ratio-calculator.service.ts
+
+export interface AspectRatio {
+  r1: number
+  r2: number
+}
+
+export interface Dimensions {
+  width: number
+  height: number
+}
+
+export function calculateAspectRatio(width: number, height: number): AspectRatio {
+  const gcd = (a: number, b: number): number => (b === 0 ? a : gcd(b, a % b));
+  const divisor = gcd(width, height);
+  return {
+    r1: width / divisor,
+    r2: height / divisor,
+  };
+}
+
+export function calculateDimensions(
+  knownDimension: number,
+  ratio: AspectRatio,
+  isWidth: boolean,
+): Dimensions {
+  if (isWidth) {
+    const height = Math.round((knownDimension * ratio.r2) / ratio.r1);
+    return { width: knownDimension, height };
+  }
+  else {
+    const width = Math.round((knownDimension * ratio.r1) / ratio.r2);
+    return { width, height: knownDimension };
+  }
+}
+
+export function simplifyRatio(r1: number, r2: number): AspectRatio {
+  const gcd = (a: number, b: number): number => (b === 0 ? a : gcd(b, a % b));
+  const divisor = gcd(r1, r2);
+  return {
+    r1: r1 / divisor,
+    r2: r2 / divisor,
+  };
+}
diff --git a/src/tools/aspect-ratio-calculator/aspect-ratio-calculator.vue b/src/tools/aspect-ratio-calculator/aspect-ratio-calculator.vue
new file mode 100644
index 00000000..643ef771
--- /dev/null
+++ b/src/tools/aspect-ratio-calculator/aspect-ratio-calculator.vue
@@ -0,0 +1,168 @@
+<!-- AspectRatioCalculator.vue -->
+<script setup lang="ts">
+import { computed, ref, watch } from 'vue';
+import { NDivider, NInputNumber, NSelect, NSpace } from 'naive-ui';
+import {
+  type AspectRatio,
+  calculateAspectRatio,
+  calculateDimensions,
+  simplifyRatio,
+} from './aspect-ratio-calculator.service';
+
+const width = ref<number | null>(null);
+const height = ref<number | null>(null);
+const r1 = ref<number | null>(null);
+const r2 = ref<number | null>(null);
+
+const presets = [
+  { label: 'HD Video 16:9', value: '16:9' },
+  { label: 'SD Video 4:3', value: '4:3' },
+  { label: 'Widescreen 21:9', value: '21:9' },
+  { label: 'Square 1:1', value: '1:1' },
+];
+const selectedPreset = ref(null);
+
+const aspectRatio = computed((): AspectRatio | null => {
+  if (r1.value && r2.value) {
+    return simplifyRatio(r1.value, r2.value);
+  }
+  return null;
+});
+
+function updateDimensions(changedField: 'width' | 'height') {
+  if (aspectRatio.value) {
+    if (changedField === 'width' && width.value) {
+      const newDimensions = calculateDimensions(width.value, aspectRatio.value, true);
+      height.value = newDimensions.height;
+    }
+    else if (changedField === 'height' && height.value) {
+      const newDimensions = calculateDimensions(height.value, aspectRatio.value, false);
+      width.value = newDimensions.width;
+    }
+  }
+}
+
+function handlePresetChange(value: string) {
+  const [newR1, newR2] = value.split(':').map(Number);
+  r1.value = newR1;
+  r2.value = newR2;
+  if (width.value) {
+    updateDimensions('width');
+  }
+  else if (height.value) {
+    updateDimensions('height');
+  }
+}
+
+watch([r1, r2], () => {
+  if (r1.value && r2.value) {
+    if (width.value) {
+      updateDimensions('width');
+    }
+    else if (height.value) {
+      updateDimensions('height');
+    }
+  }
+});
+</script>
+
+<template>
+  <NSpace vertical :size="24">
+    <div>
+      <h3>Common Presets</h3>
+      <NSelect
+        v-model:value="selectedPreset"
+        :options="presets"
+        placeholder="Select a preset"
+        @update:value="handlePresetChange"
+      />
+    </div>
+
+    <div class="input-group">
+      <div class="input-pair">
+        <label>Pixels width</label>
+        <NInputNumber v-model:value="width" placeholder="Pixels width" :min="1" @update:value="() => updateDimensions('width')" />
+      </div>
+      <div class="input-pair">
+        <label>Pixels height</label>
+        <NInputNumber v-model:value="height" placeholder="Pixels height" :min="1" @update:value="() => updateDimensions('height')" />
+      </div>
+    </div>
+
+    <div class="input-group">
+      <div class="input-pair">
+        <label>Ratio width</label>
+        <NInputNumber v-model:value="r1" placeholder="Ratio width" :min="1" />
+      </div>
+      <div class="separator">
+        :
+      </div>
+      <div class="input-pair">
+        <label>Ratio height</label>
+        <NInputNumber v-model:value="r2" placeholder="Ratio height" :min="1" />
+      </div>
+    </div>
+  </NSpace>
+</template>
+
+<style scoped>
+h2 {
+  font-size: 24px;
+  margin-bottom: 8px;
+}
+
+h3 {
+  font-size: 18px;
+  margin-bottom: 8px;
+}
+
+p {
+  margin-bottom: 24px;
+  color: #a0a0a0;
+}
+
+.input-group {
+  display: flex;
+  align-items: flex-end;
+  gap: 16px;
+}
+
+.input-pair {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+}
+
+.input-pair label {
+  margin-bottom: 4px;
+  color: #a0a0a0;
+}
+
+.separator {
+  align-self: flex-end;
+  margin-bottom: 7px;
+  font-size: 24px;
+  font-weight: bold;
+}
+
+.result {
+  font-size: 18px;
+  color: #ffffff;
+}
+
+:deep(.n-input-number) {
+  width: 100%;
+}
+
+:deep(.n-input-number-input) {
+  text-align: left;
+}
+
+:deep(.n-select) {
+  width: 100%;
+}
+
+:deep(.n-divider) {
+  margin: 16px 0;
+}
+</style>
diff --git a/src/tools/aspect-ratio-calculator/index.ts b/src/tools/aspect-ratio-calculator/index.ts
new file mode 100644
index 00000000..c51e27fb
--- /dev/null
+++ b/src/tools/aspect-ratio-calculator/index.ts
@@ -0,0 +1,12 @@
+import { AspectRatio } from '@vicons/tabler';
+import { defineTool } from '../tool';
+
+export const tool = defineTool({
+  name: 'Aspect Ratio Calculator',
+  path: '/aspect-ratio-calculator',
+  description: 'Use this ratio calculator to check the dimensions when resizing images.',
+  keywords: ['aspect', 'ratio', 'calculator'],
+  component: () => import('./aspect-ratio-calculator.vue'),
+  icon: AspectRatio,
+  createdAt: new Date('2024-08-14'),
+});
diff --git a/src/tools/index.ts b/src/tools/index.ts
index 14cf4dd6..dc2d9e1b 100644
--- a/src/tools/index.ts
+++ b/src/tools/index.ts
@@ -1,6 +1,7 @@
 import { tool as base64FileConverter } from './base64-file-converter';
 import { tool as base64StringConverter } from './base64-string-converter';
 import { tool as basicAuthGenerator } from './basic-auth-generator';
+import { tool as aspectRatioCalculator } from './aspect-ratio-calculator';
 
 import { tool as asciiTextDrawer } from './ascii-text-drawer';
 
@@ -136,7 +137,7 @@ export const toolsByCategory: ToolCategory[] = [
   },
   {
     name: 'Images and videos',
-    components: [qrCodeGenerator, wifiQrCodeGenerator, svgPlaceholderGenerator, cameraRecorder],
+    components: [qrCodeGenerator, wifiQrCodeGenerator, svgPlaceholderGenerator, cameraRecorder, aspectRatioCalculator],
   },
   {
     name: 'Development',