diff --git a/Conversions/CelsiusToFahrenheit.js b/Conversions/CelsiusToFahrenheit.js
new file mode 100644
index 0000000000..e6c3c99520
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+++ b/Conversions/CelsiusToFahrenheit.js
@@ -0,0 +1,19 @@
+/**
+ * @function celsiusToFahrenheit
+ * @description Converts a temperature from Celsius to Fahrenheit.
+ *   The formula is: F = (C × 9/5) + 32
+ * @param {number} celsius - Temperature in Celsius
+ * @returns {number} - Temperature in Fahrenheit
+ * @see https://en.wikipedia.org/wiki/Fahrenheit
+ * @example celsiusToFahrenheit(0) => 32
+ * @example celsiusToFahrenheit(100) => 212
+ * @example celsiusToFahrenheit(-40) => -40
+ */
+const celsiusToFahrenheit = (celsius) => {
+  if (typeof celsius !== 'number' || isNaN(celsius)) {
+    throw new TypeError('Input must be a number')
+  }
+  return (celsius * 9) / 5 + 32
+}
+
+export { celsiusToFahrenheit }
diff --git a/Conversions/test/CelsiusToFahrenheit.test.js b/Conversions/test/CelsiusToFahrenheit.test.js
new file mode 100644
index 0000000000..82efc26bad
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+++ b/Conversions/test/CelsiusToFahrenheit.test.js
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+import { celsiusToFahrenheit } from '../CelsiusToFahrenheit.js'
+
+describe('celsiusToFahrenheit', () => {
+  test('celsiusToFahrenheit(0) returns 32', () => {
+    expect(celsiusToFahrenheit(0)).toBe(32)
+  })
+
+  test('celsiusToFahrenheit(100) returns 212', () => {
+    expect(celsiusToFahrenheit(100)).toBe(212)
+  })
+
+  test('celsiusToFahrenheit(-40) returns -40', () => {
+    expect(celsiusToFahrenheit(-40)).toBe(-40)
+  })
+
+  test('celsiusToFahrenheit(37) returns 98.6', () => {
+    expect(celsiusToFahrenheit(37)).toBeCloseTo(98.6)
+  })
+
+  test('celsiusToFahrenheit(-273.15) returns -459.67', () => {
+    expect(celsiusToFahrenheit(-273.15)).toBeCloseTo(-459.67)
+  })
+
+  test('celsiusToFahrenheit(20) returns 68', () => {
+    expect(celsiusToFahrenheit(20)).toBe(68)
+  })
+
+  test('throws TypeError for non-number input', () => {
+    expect(() => celsiusToFahrenheit('100')).toThrow(TypeError)
+  })
+
+  test('throws TypeError for NaN', () => {
+    expect(() => celsiusToFahrenheit(NaN)).toThrow(TypeError)
+  })
+})