चाहिए in Hindi: how to say “I want”, “I need” and “I should”

चाहिए means “is wanted” or “is needed”, and it never changes form for the person who wants something — the person is marked with को instead. मुझे पानी चाहिए is “I want water”. Put a verb in front of it instead of a noun and the meaning shifts completely: मुझे जाना चाहिए means “I should go”, not “I want to go”. To say you want to *do* something you need a different verb altogether, चाहना: मैं जाना चाहता हूँ.

English uses “want” for both a thing and an action — “I want water”, “I want to go”. Hindi splits those apart, and then reuses चाहिए for “should”, which is where most of the confusion comes from.

Wanting a thing: को + चाहिए

The thing wanted is the grammatical subject, and the person who wants it is marked with को — which fuses into मुझे, तुम्हें, आपको, उसे and हमें. चाहिए itself does no work beyond sitting at the end.

चाहिए does not conjugate for the person — मुझे चाहिए, उसे चाहिए and हमें चाहिए all use the same form. Only the tense marker after it changes, as in चाहिए था for the past. This is the same को construction behind मुझे भूख लगी है, described in Hindi has no verb for “to have”.

Wanting to do something: चाहना, which does conjugate

For an action, चाहिए is simply wrong. You need the verb चाहना, the infinitive of what you want to do goes in front of it, and now the sentence behaves normally — मैं is the subject and the verb agrees with it.

Because चाहना is an ordinary verb, it takes the gender agreement every Hindi verb takes — चाहता for a man, चाहती for a woman, on the pattern in why the verb changes when a woman speaks.

The trap: मुझे जाना चाहिए means “I should go”

Here is the sentence pair that catches everyone. Both use जाना. One is a want and the other is advice, and the only difference is which construction surrounds it.

So चाहिए has two jobs, decided by what precedes it: after a noun it means “wanted”, and after an infinitive verb it means “should”. This is genuinely useful once you see it, because it hands you the whole of Hindi advice-giving for free.

मुझे जाना चाहिए था is “I should have gone” — the regret form, and one of the most useful sentences in the language. Adding था to the advice construction shifts it into the past exactly as it does elsewhere, per Hindi verb tenses on one page.

And मुझे जाना है means “I have to go”

One more construction sits alongside these, and it is the one people use constantly. Drop चाहिए and use है instead, and the advice becomes a plan or an obligation.

That table is the whole system on four lines. English needs “want”, “should”, “have to” and “had to” to cover it; Hindi keeps जाना in place and changes only what follows.

चाहिए or ज़रूरत — want against genuine need

चाहिए covers both wanting and needing, which is usually fine. When you mean necessity specifically, Hindi has ज़रूरत — a feminine noun, so it takes की.

मुझे तुम चाहिए is grammatical but reads as a declaration of desire rather than a request for help. If you mean you need someone's assistance, use ज़रूरत.

Why translation tools get this wrong

Row one is not ungrammatical, just stiff and unidiomatic — मैं पानी चाहता हूँ is the sort of thing nobody says at a dhaba. Rows two and three are worse, because they swap desire for obligation in both directions, which is the confident-and-wrong output described in why translation tools fail at Hinglish.

The short version

• Want a thing: को + noun + चाहिए — मुझे पानी चाहिए.
• Want to do something: चाहना, conjugated — मैं जाना चाहता हूँ.
• Infinitive + चाहिए does not mean want; it means should — मुझे जाना चाहिए.
• Infinitive + है means have to — मुझे जाना है.
• Add था for the past: मुझे जाना चाहिए था is “I should have gone”.
• चाहिए never changes for the person; the person is always marked with को.
• For real necessity use की ज़रूरत है rather than चाहिए.