diff --git a/src/date/duration.spec.ts b/src/date/duration.spec.ts
new file mode 100644
index 0000000..5b7630b
--- /dev/null
+++ b/src/date/duration.spec.ts
@@ -0,0 +1,57 @@
+import { secondsToDuration, secondsToReadableDuration } from './duration';
+
+describe('duration', () => {
+  describe('secondsToDuration', () => {
+    it('handles null input', () => {
+      expect(secondsToDuration(null)).toBe('00:00');
+    });
+
+    it('formats seconds as mm:ss', () => {
+      expect(secondsToDuration(4)).toBe('00:04');
+      expect(secondsToDuration(44)).toBe('00:44');
+    });
+
+    it('formats minutes as mm:ss', () => {
+      expect(secondsToDuration(444)).toBe('07:24');
+    });
+
+    it('formats hours as HH:mm:ss', () => {
+      expect(secondsToDuration(44444)).toBe('12:20:44');
+    });
+
+    it('formats hours (more than 24) as dd:HH:mm:ss', () => {
+      expect(secondsToDuration(444444)).toBe('05:03:27:24');
+    });
+
+    it('handles decimal duration inputs', () => {
+      expect(secondsToDuration(2565.568)).toBe('42:45');
+    });
+  });
+
+  describe('secondsToReadableDuration', () => {
+    it('handles null input', () => {
+      expect(secondsToDuration(null)).toBe('00:00');
+    });
+
+    it('formats seconds as s', () => {
+      expect(secondsToReadableDuration(4)).toBe('4 s');
+      expect(secondsToReadableDuration(44)).toBe('44 s');
+    });
+
+    it('formats minutes as mm ss', () => {
+      expect(secondsToReadableDuration(444)).toBe('7m 24s');
+    });
+
+    it('formats hours as HH mm', () => {
+      expect(secondsToReadableDuration(44444)).toBe('12h 21m');
+    });
+
+    it('formats hours (more than 24) as dd HH', () => {
+      expect(secondsToReadableDuration(444444)).toBe('5d 3h');
+    });
+
+    it('handles decimal duration inputs', () => {
+      expect(secondsToReadableDuration(2565.568)).toBe('43m');
+    });
+  });
+});
diff --git a/src/date/duration.ts b/src/date/duration.ts
new file mode 100644
index 0000000..e06790a
--- /dev/null
+++ b/src/date/duration.ts
@@ -0,0 +1,78 @@
+const ensureNumber = (value: number | unknown) => {
+  if (typeof value !== 'number') {
+    return 0;
+  }
+
+  return value;
+};
+
+export const secondsToDuration = (seconds: number | unknown) => {
+  const normalizedSeconds = Math.floor(ensureNumber(seconds));
+
+  if (normalizedSeconds <= 0) {
+    return '00:00';
+  }
+
+  const days = Math.floor(normalizedSeconds / (60 * 60 * 24));
+  const minutes = Math.floor(normalizedSeconds / 60) % 60;
+  let hours = Math.floor(normalizedSeconds / (60 * 60));
+
+  if (days) {
+    hours = Math.round((normalizedSeconds - days * (60 * 60 * 24)) / 60 / 60);
+
+    return [days, hours, minutes, normalizedSeconds % 60]
+      .map((v) => (v < 10 ? `0${v}` : v))
+      .filter((v, i) => v !== '00' || i > 0)
+      .join(':');
+  }
+
+  return [hours, minutes, normalizedSeconds % 60]
+    .map((v) => (v < 10 ? `0${v}` : v))
+    .filter((v, i) => v !== '00' || i > 0)
+    .join(':');
+};
+
+export const secondsToReadableDuration = (seconds: number | unknown) => {
+  const normalizedSeconds = Math.floor(ensureNumber(seconds));
+
+  if (normalizedSeconds <= 0) {
+    return '';
+  }
+
+  const fSec = 's';
+  const fMin = 'm';
+  const fHour = 'h';
+  const fDay = 'd';
+
+  if (normalizedSeconds < 60) {
+    return `${seconds} ${fSec}`;
+  }
+
+  if (normalizedSeconds > 60 * 60 * 24) {
+    const days = Math.floor(normalizedSeconds / (60 * 60 * 24));
+    const hour = Math.round(
+      (normalizedSeconds - days * (60 * 60 * 24)) / 60 / 60
+    );
+    return `${days}${fDay}${hour > 0 ? ` ${hour}${fHour}` : ''}`;
+  }
+
+  if (normalizedSeconds >= 60 * 60) {
+    const hour = Math.floor(normalizedSeconds / (60 * 60));
+    const m = Math.round((normalizedSeconds - hour * 60 * 60) / 60);
+    let mins = '';
+
+    if (m > 0) {
+      mins = ` ${m}${fMin}`;
+    }
+
+    return `${hour}${fHour}${mins}`;
+  }
+
+  if (normalizedSeconds > 60) {
+    const m = Math.round(normalizedSeconds / 60);
+    const sec = normalizedSeconds - m * 60;
+    const secText = sec > 0 ? ` ${sec}${fSec}` : '';
+
+    return `${m}${fMin}${secText}`;
+  }
+};
diff --git a/src/index.spec.ts b/src/index.spec.ts
index 2ef1740..d1dc828 100644
--- a/src/index.spec.ts
+++ b/src/index.spec.ts
@@ -13,6 +13,8 @@ describe('lib', () => {
         "formatDate": [Function],
         "getUnixTimestamp": [Function],
         "isErrorLocalizer": [Function],
+        "secondsToDuration": [Function],
+        "secondsToReadableDuration": [Function],
         "toHumanFileSize": [Function],
         "toTimeAgo": [Function],
       }
diff --git a/src/index.ts b/src/index.ts
index 4b7b93e..9f3c9df 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,5 +1,6 @@
 export { default as ExtendableError } from 'es6-error';
 export * from './date/date';
+export * from './date/duration';
 export * from './errors';
 export * from './file/file';
 export * from './localized-error/LocalizedError';