diff --git a/src/index.test.ts b/src/index.test.ts
index 5035ab9..baa08c0 100644
--- a/src/index.test.ts
+++ b/src/index.test.ts
@@ -385,3 +385,28 @@ describe('ms(invalid inputs)', () => {
     }).toThrow();
   });
 });
+
+//multiple units
+describe('ms(multipleunits)', () => {
+  it('should not throw an error, when ms(hasmorethanoneunit)', () => {
+    expect(() => {
+      ms('3y40s');
+    }).not.toThrow();
+    expect(() => {
+      ms('3y 40s');
+    }).not.toThrow();
+    expect(() => {
+      ms('3 y 40 s');
+    }).not.toThrow();
+  });
+
+  it('should convert all values into ms', () => {
+    expect(ms('1 h 45 s')).toBe(3645000);
+    expect(ms('3seconds40s')).toBe(43000);
+    expect(ms('1m1mo1ms')).toBe(2629860001);
+  });
+
+  it('should return NaN if invalid', () => {
+    expect(Number.isNaN(ms('3h2failure'))).toBe(true);
+  });
+});
diff --git a/src/index.ts b/src/index.ts
index d50e3c7..e516bab 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -29,7 +29,10 @@ type UnitAnyCase = Capitalize<Unit> | Uppercase<Unit> | Unit;
 export type StringValue =
   | `${number}`
   | `${number}${UnitAnyCase}`
-  | `${number} ${UnitAnyCase}`;
+  | `${number} ${UnitAnyCase}`
+  | `${`${number}${Years}` | ``}${`${number}${Months}` | ``}${`${number}${Weeks}` | ``}${`${number}${Days}` | ``}${`${number}${Hours}` | ``}${`${number}${Minutes}` | ``}${`${number}${Seconds}` | ``}${`${number}${Milliseconds}` | `${number}` | ``}`
+  | `${`${number} ${Years}` | ``} ${`${number} ${Months}` | ``} ${`${number} ${Weeks}` | ``} ${`${number} ${Days}` | ``} ${`${number} ${Hours}` | ``} ${`${number} ${Minutes}` | ``} ${`${number} ${Seconds}` | ``} ${`${number} ${Milliseconds}` | `${number}` | ``}`
+  | `${`${number}${Years}` | ``} ${`${number}${Months}` | ``} ${`${number}${Weeks}` | ``} ${`${number}${Days}` | ``} ${`${number}${Hours}` | ``} ${`${number}${Minutes}` | ``} ${`${number}${Seconds}` | ``} ${`${number}${Milliseconds}` | `${number}` | ``}`;
 
 interface Options {
   /**
@@ -80,7 +83,7 @@ export function parse(str: string): number {
     );
 
   if (!match?.groups) {
-    return NaN;
+    return multipleUnits(str);
   }
 
   // Named capture groups need to be manually typed today.
@@ -157,6 +160,30 @@ export function parseStrict(value: StringValue): number {
   return parse(value);
 }
 
+/**
+ * Parse the given string with multiple time units and return milliseconds.
+ *
+ * @param value - A typesafe StringValue comprised of multiple strings to convert
+ * into milliseconds
+ * @returns The sum of all parsed strings value in milliseconds, or `NaN` if the
+ * string can't be parsed
+ */
+
+function multipleUnits(value: string): number {
+  const regEx =
+    /\d*\.?\d+ *(?:milliseconds?|msecs?|ms|seconds?|secs?|s|months?|mo|minutes?|mins?|m|hours?|hrs?|h|days?|d|weeks?|w|years?|yrs?|y)/gi;
+
+  const match = [...value.matchAll(regEx)].flat();
+  const unmatchedString = value.replaceAll(regEx, '');
+  const spaceRegEx = /^ *$/;
+
+  if (match.length === 0 || spaceRegEx.exec(unmatchedString) === null) {
+    return NaN;
+  }
+
+  return match.reduce((accumulator, unit) => parse(unit) + accumulator, 0);
+}
+
 /**
  * Short format for `ms`.
  */
diff --git a/src/parse-strict.test.ts b/src/parse-strict.test.ts
index 9c30a5e..3ee9869 100644
--- a/src/parse-strict.test.ts
+++ b/src/parse-strict.test.ts
@@ -219,3 +219,23 @@ describe('parseStrict(invalid inputs)', () => {
     }).toThrow();
   });
 });
+
+//multiple units
+describe('ms(multipleunits)', () => {
+  it('should not throw an error, when ms(hasmorethanoneunit)', () => {
+    expect(() => {
+      parseStrict('3y40s');
+    }).not.toThrow();
+    expect(() => {
+      parseStrict('3y 40s');
+    }).not.toThrow();
+    expect(() => {
+      parseStrict('3 y 40 s');
+    }).not.toThrow();
+  });
+
+  it('should convert all values into ms', () => {
+    expect(parseStrict('1 h 45 s')).toBe(3645000);
+    expect(parseStrict('3seconds40s')).toBe(43000);
+  });
+});
diff --git a/src/parse.test.ts b/src/parse.test.ts
index 9182411..a560334 100644
--- a/src/parse.test.ts
+++ b/src/parse.test.ts
@@ -206,3 +206,27 @@ describe('parse(invalid inputs)', () => {
     }).toThrow();
   });
 });
+
+//multiple units
+describe('ms(multipleunits)', () => {
+  it('should not throw an error, when ms(hasmorethanoneunit)', () => {
+    expect(() => {
+      parse('3y40s');
+    }).not.toThrow();
+    expect(() => {
+      parse('3y 40s');
+    }).not.toThrow();
+    expect(() => {
+      parse('3 y 40 s');
+    }).not.toThrow();
+  });
+
+  it('should convert all values into ms', () => {
+    expect(parse('1 h 45 s')).toBe(3645000);
+    expect(parse('3seconds40s')).toBe(43000);
+  });
+
+  it('should return NaN if invalid', () => {
+    expect(Number.isNaN(parse('3h2failure'))).toBe(true);
+  });
+});