Do able (Doable)

Short answer: write doable as one word. The adjective comes from do + -able, so "do able" or "do-able" is incorrect or unnecessary in modern English.

Below: a quick rule, focused rewrites you can copy, many wrong/right pairs, and a simple memory trick to stop the spacing error.

Quick answer

Doable is one word. Replace any "do able" or "do-able" with "doable."

Correct: doable - The task is doable.
Incorrect: do able - The task is do able.
Avoid: do-able (unnecessary hyphen).

Core explanation

The suffix -able attaches directly to verb stems to form adjectives (readable, manageable, achievable). Do + -able follows the same pattern and becomes doable. Leaving a space turns it into two words and makes it read like a phrase, not an adjective.

-able attaches to the verb: do + -able → doable.
Treat doable like any other single-word adjective: a doable goal, the task is doable.

Spacing and hyphenation (do able, do-able, doable)

Doable is correct without a hyphen. "Do-able" looks dated and "do able" is a spacing mistake. Hyphens belong when they resolve ambiguity or follow a specific style rule - neither applies here.

Use: doable
Avoid: do able, do-able
When editing, only hyphenate if a style guide explicitly requires it or a readability problem exists.

Grammar note: how doable functions

Doable is an adjective. Use it predicatively (The task is doable) or attributively (a doable task). You can qualify it with modifiers: barely doable, perfectly doable, not doable.

Predicative: The assignment is doable.
Attributive: a doable assignment.
Modifiers: barely doable, very doable, hardly doable.

Real usage: when to use doable and when to pick alternatives

Doable is neutral and fine in work, school, and casual contexts. Choose feasible, achievable, or practical when you need more formality or to emphasize constraints, resources, or technical limits. If you mean "possible but difficult," add a modifier: barely doable, only with support, etc.

Work: signals feasibility without overpromising.
School: communicates a realistic task students can complete.
Casual: conversational and common (Totally doable!).

Fix your sentence: rewrite help and checklist

Checklist: find "do able" → replace with "doable" → read aloud → if vague, add specifics or pick a more precise word.

Step 1: Replace "do able" with "doable."
Step 2: If the sentence still feels weak, add timeframes or resources, or swap in feasible/achievable for formality.
Step 3: For formal writing, prefer feasible or achievable when assessing constraints.

Quick rewrites you can copy:

Original: The task is do able, we can do it. →
Rewrite: The task is doable; we can complete it by Friday.
Original: Is finishing this report do able by Friday? →
Rewrite: Can we realistically finish this report by Friday?
Original: We need a do able plan to launch the feature. →
Rewrite: We need a doable plan we can execute in two sprints.
Original: Is learning to code do able in three months? →
Rewrite: Is learning to code doable in three months with daily practice?

Examples: wrong/right pairs and categorized sentences

Scan these pairs and copy the corrected sentence. Focus on the corrected single-word form and the tightened rewrites where present.

Wrong: The deadline is tight but do able.
Right: The deadline is tight but doable.
Wrong: Is this task do able for one person?
Right: Is this task doable for one person?
Wrong: That budget cut makes the project less do able.
Right: That budget cut makes the project less doable.
Wrong: This homework isn't do able without help.
Right: This homework isn't doable without help.
Wrong: We need a do able plan to launch the feature.
Right: We need a doable plan to launch the feature.
Wrong: Fixing the leaky faucet is do able if we buy parts.
Right: Fixing the leaky faucet is doable if we buy the right parts.

Work examples

The rollout is doable if we phase it over three sprints.
With vendor support, migrating the database looks doable by June.
Automating the weekly report is doable and will save hours.

School examples

Breaking the essay into sections made the assignment doable.
The lab experiment was tough but doable during scheduled hours.
With a study plan, passing the exam is doable.

Casual examples

A weekend road trip? Totally doable.
Cooking a three-course meal is doable with a simple menu.
Fixing the leaky faucet is doable if we buy the right parts.

Memory trick: three quick checks to stop writing "do able"

Use one of these each time you see do + able.

Swap test: Replace with readable. If you wouldn't write "read able," write "doable."
Before-noun test: If it fits before a noun (a doable plan), it should be one word.
Search-and-replace: Find "do able" in your draft and replace with "doable," then read aloud.

Tip: If it sounds natural before a noun (a doable plan), keep it as one word.

Similar mistakes to watch for

If you spot "do able," scan for other verb + -able splits and spacing errors.

do-able → doable
re write → rewrite
any thing → anything
in credible → incredible
run able → runnable

Usage: Wrong: re write the memo.
Correct: rewrite the memo.
Usage: Wrong: any thing else?
Correct: anything else?

FAQ

Is doable one word or two?

Doable is one word. The correct spelling is doable, not do able.

Can you hyphenate do-able?

No-generally not. Do-able is unnecessary and nonstandard; use doable without a hyphen unless a rare style rule requires it.

Does this rule apply in casual text or texting?

Yes. Even in casual writing, doable is the standard form. The spaced version is a common mistake but not standard.

When should I use feasible or achievable instead of doable?

Use feasible or achievable in formal reports or technical assessments when you want to emphasize constraints, costs, or technical feasibility. Use doable for neutral, everyday statements.

How can I stop making this error when proofreading?

Search your draft for "do able," use the memory tricks above, replace with doable, and read the sentence aloud to confirm tone and precision.

Need a fast sentence check?

Copy a sentence into your editor or a grammar tool, replace "do able" with "doable," and read it aloud. If you want a tighter rewrite beyond the spacing fix, paste a sentence here and get a short rewrite for work, school, or casual tone.