क्या यह पार्सल एक किलो का है?

At the start of this sentence, क्या is a yes/no question marker. It does not mean what here.

So:

• यह पार्सल एक किलो का है। = This parcel is one kilo / weighs one kilo.
• क्या यह पार्सल एक किलो का है? = Is this parcel one kilo?

Yes, क्या can also mean what in other sentences, but in this position at the beginning, it usually just turns the sentence into a yes/no question.

Hindi often forms yes/no questions by putting क्या at the beginning and leaving the rest of the sentence mostly unchanged.

Statement:

• यह पार्सल एक किलो का है।

Question:

• क्या यह पार्सल एक किलो का है?

Also notice that Hindi normally keeps the verb at the end, so है comes last.

यह means this.

In context, यह पार्सल means this parcel.

A learner should also know:

• यह is the standard written form.
• In speech, it is often pronounced more like ये or यह/ये depending on the speaker.

So you may hear something like:

• क्या ये पार्सल एक किलो का है?

That is very common in spoken Hindi.

एक literally means one.

In this sentence, it refers to the quantity/weight:

• एक किलो = one kilo

In English, that can naturally become either:

• one kilo
• a kilo

So both ideas are connected here. Hindi uses एक, while English may choose a or one depending on style.

In Hindi, expressions of size, weight, price, and measurement often use का / की / के after the measure to describe a noun.

So:

• एक किलो का पार्सल = a one-kilo parcel
• यह पार्सल एक किलो का है = this parcel is one kilo in weight

This का links the measurement to the noun.

Similar patterns:

• दो मीटर का कपड़ा = cloth of two meters
• सौ रुपये का टिकट = a hundred-rupee ticket
• पाँच किलो की बोरी = a five-kilo sack

So एक किलो का is the normal way to say of one kilo / one-kilo.

Because का / की / के agrees with the noun being described, and here that noun is पार्सल.

पार्सल is normally treated as masculine singular, so we use का:

• एक किलो का पार्सल
• यह पार्सल एक किलो का है

If the noun were feminine, you would use की:

• एक किलो की थैली = a one-kilo bag

If the noun were plural, you would use के:

• ये पार्सल एक किलो के हैं = these parcels are one kilo each

So the ending matches the noun, not किलो.

Yes, it is usually treated as masculine.

Many borrowed nouns in Hindi are assigned a grammatical gender, and पार्सल is commonly used as masculine. That is why the sentence has:

• का
• है with a singular noun

So:

• यह पार्सल एक किलो का है।

If you used a feminine noun instead, the form would change:

• यह थैली एक किलो की है।

Because Hindi normally places the main verb at or near the end of the sentence.

So the structure is very natural for Hindi:

• यह = this
• पार्सल = parcel
• एक किलो का = of one kilo / one-kilo
• है = is

That final है is one of the most basic features of Hindi sentence structure.

Yes, especially in speech.

You can ask a yes/no question just by using rising intonation:

• यह पार्सल एक किलो का है?

This is understandable and common in conversation.

However, adding क्या makes the question clearer and more explicit:

• क्या यह पार्सल एक किलो का है?

So both are possible, but क्या is the safer and more textbook-style form.

You might be understood, but it is less natural than एक किलो का है in this context.

For a parcel's weight, Hindi usually prefers either:

• क्या यह पार्सल एक किलो का है?
• क्या इस पार्सल का वज़न एक किलो है?

The second one is even more explicit:

• इस पार्सल का वज़न = the weight of this parcel

So if you are talking about how much the parcel weighs, एक किलो का है is a very natural pattern.

A more explicit version is:

• क्या इस पार्सल का वज़न एक किलो है?

This literally means:

• Is the weight of this parcel one kilo?

Compared with the original:

• क्या यह पार्सल एक किलो का है?

the original is shorter and very natural, while the वज़न version makes the idea of weight more direct.

Yes. This is a very useful Hindi pattern.

You can use it with weight, size, length, price, age, and more.

Examples:

• यह बैग पाँच किलो का है। = This bag is five kilos.
• यह डंडा दो मीटर का है। = This stick is two meters long.
• यह टिकट सौ रुपये का है। = This ticket costs one hundred rupees.
• यह बच्चा तीन साल का है। = This child is three years old.

So X + measure + का/की/के + है is a very productive structure in Hindi.