Welcome back to our daily Idiom series — made to help you sound more natural in everyday English.
Today’s idiom is “Rule of Thumb.” Let’s learn what it means, when to use it, and see some quick examples.
Quick Summary
- Idiom: Rule of Thumb
- Meaning: A general guideline or simple practical rule based on experience, not exact science
- Example: As a rule of thumb, drink at least 6–8 glasses of water every day.
When someone is using the idiom “as a rule of thumb,” they’re talking about a basic guideline that usually works in everyday life. That means, It’s not a strict rule. It’s not scientifically perfect. It’s just an easy method people follow because it’s helpful and proven by experience.
For examples, A cook might say, “As a rule of thumb, taste your food before adding extra salt.” And, A teacher might say, “A rule of thumb is to revise the lesson the same day.”
This idiom is useful in conversations about habits, advice, tips, and general guidance.
Want to learn more idioms easily? Check out our Complete Guide to Everyday American Idioms—you’ll find more simple meanings, fun examples, and real-life practice!
10 Simple Examples of Rule of Thumb Idiom
- As a rule of thumb, I check my emails twice a day to stay organised.
- As a rule of thumb, add water slowly when mixing dough.
- As a rule of thumb, save at least 10% of your income.
- As a rule of thumb, shut down your computer once a week to refresh it.
- As a rule of thumb, leave early to avoid traffic.
- As a rule of thumb, reply to messages within 24 hours.
- As a rule of thumb, stretch for five minutes before any workout.
- As a rule of thumb, don’t shop online when you’re sleepy – you’ll overspend!
- As a rule of thumb, check expiration dates before buying groceries.
- As a rule of thumb, read a summary before watching a complicated movie.
Check out our Complete A–Z Idioms List — simple meanings, everyday examples, and easy explanations all in one place!