Both can mean physical distance. Only further can mean additional or figurative distance. When in doubt, use further — it covers all meanings.

The Core Difference

Farther refers specifically to physical, measurable distance. You can use it when you are talking about how far one place is from another, or how far someone has travelled:

The shop is farther than I thought.

Can you walk any farther?

The second village is farther down the road.

Further covers everything farther can do, and more. It is the correct choice for physical distance, figurative distance, and any additional or abstract meaning:

I need to look into this further.

I have no further questions.

The shop is further than I thought.

We will discuss this further at the next meeting.

For further information, please contact us.

Comparison Table

Word Physical distance Figurative / abstract Additional / more As a verb
further ✓ Yes ✓ Yes ✓ Yes ✓ Yes
farther ✓ Yes ✗ No ✗ No ✗ No

Further as an Adjective Meaning ‘Additional’

One of the clearest ways to see why further is the safer word is its use as an adjective meaning additional or extra. This meaning does not exist for farther:

There will be no further delays.

Do you require any further assistance?

Without further ado, let us begin.

Please refer to the further reading list.

There will be no farther delays.  ✕ incorrect

Further as a Verb

Further can also function as a verb, meaning to advance or promote something. Farther cannot be used as a verb at all:

She studied hard to further her career.

This funding will further our research.

He hoped the meeting would further the cause.

She studied hard to farther her career.  ✕ incorrect

British English vs American English

In British English, further is strongly preferred for all uses, including physical distance. Farther does appear in British writing, particularly in formal or literary contexts, but it is far less common in everyday speech.

In American English, some style guides recommend reserving farther for measurable physical distance and further for everything else. Even so, many American speakers use further for physical distance too, and this is universally accepted.

The practical conclusion: if you are writing in British English or are unsure which variety to follow, use further throughout and you will always be correct.

Superlative Forms: Furthest and Farthest

The superlative forms follow the same pattern. Furthest is the superlative of further, and farthest is the superlative of farther. In British English, furthest is used for both physical and figurative contexts:

She walked the furthest of anyone in the group.

That idea goes furthest towards solving the problem.

The furthest planet from the sun is Neptune.

Correct and Incorrect Examples

Correct Incorrect Reason
I need further information. I need farther information. Further = additional; farther cannot mean additional
The station is further than I expected. Further is always correct for physical distance
We discussed it further. We discussed it farther. Figurative/abstract sense: only further works
She furthered her career. She farthered her career. Further is a verb; farther is not
No further action required. No farther action required. Further = additional; farther has no such meaning
The farther bank of the river. Farther is acceptable here for measurable distance (though further also works)
Without further ado. Without farther ado. Fixed phrase; farther never appears in set phrases
Furthermore, the evidence is clear. Farthermore, the evidence is clear. Farthermore does not exist
Memory Tip

Further = Further uses. The word further itself goes further than farther — it does more jobs. Think of it this way: farther only handles one lane of traffic (physical distance), while further handles all lanes.

If you can replace the word with additional or more and the sentence still makes sense, you must use further: “I need additional information” → further is correct.

Related Pages and Practice

For a full side-by-side breakdown including formal grammar notes and more examples, see the dedicated confusing-words guide: Further vs Farther — What’s the Difference?

You can also practise word-choice questions like this one in our interactive exercises:

Frequently Asked Questions

What is the basic difference between further and farther?
Farther refers specifically to measurable physical distance: “The station is farther than I expected.” Further covers physical distance AND abstract or figurative meanings: “I need to look into this further.” “I have no further questions.” In British English, further is preferred for both uses.
Can I always use further instead of farther?
Yes. Further is the safer, more versatile choice and is always acceptable. Farther can only be used for physical distance. Because further covers all the same ground as farther and more, you will never be wrong using further in any context.
Is farther used in British English?
Farther is much less common in British English than in American English. In British English, further is the standard choice for both physical and figurative distance. Farther does appear in formal or literary British writing when referring to measurable distance, but in everyday speech and writing, further is strongly preferred.
When do American English speakers use farther versus further?
In American English, many style guides recommend using farther for measurable physical distance (“Detroit is farther from Chicago than Cleveland is”) and further for figurative or abstract distance (“let’s not discuss this any further”). However, this distinction is not always observed even by native American speakers, and further is widely accepted for both.
Can further mean ‘additional’ and farther cannot?
Correct. Further — but never farther — can mean additional or more: “Do you have any further questions?” “No further action is required.” “For further information, see page 12.” In all these sentences, further means additional, not related to distance at all. Farther cannot be used in these contexts.
What does ‘furthermore’ mean, and is there a ‘farthermore’?
Furthermore is a common adverb meaning “in addition” or “moreover”: “The plan is expensive; furthermore, it is risky.” There is no word farthermore in English. This is another example of how further extends into abstract and additive meanings that farther simply does not have.
How do I use further as a verb?
Further can be a verb meaning to advance or promote something: “She worked hard to further her career.” “The charity aims to further the cause of equality.” Farther cannot be used as a verb at all. This verbal use is another key distinction: if you need a verb, further is the only option.
Are further and farther both comparative forms?
Yes, both are comparative forms of far. Further and farther are the comparative forms (meaning more far), and furthest and farthest are the superlative forms (meaning most far). However, further and furthest have expanded beyond pure comparison to include the meanings of additional and to a greater extent, which farther and farthest have not.
Which word should I use in academic or formal writing?
Use further in academic and formal writing. It is correct for physical distance, figurative distance, and additional/extra meanings, and it is the standard form in British English style guides including Oxford and Cambridge. Using farther in British academic writing may appear overly influenced by American usage.
What is the superlative of further and farther?
The superlative of further is furthest, and the superlative of farther is farthest. As with the comparative forms, furthest is preferred in British English and covers both physical and figurative meanings: “She walked furthest.” “That idea goes furthest towards solving the problem.” Farthest is mainly used for physical distance in American English.