If you’ve ever seen both metre and meter, you might assume one is wrong. But actually, both are correct—they’re just used in different types of English.
This is another classic British vs American spelling difference, and once you understand the pattern, it becomes very easy to remember.
The Quick Answer
- 🇬🇧 Metre → British English
- 🇺🇸 Meter → American English
So:
- “The room is 10 metres long.” 🇬🇧
- “The room is 10 meters long.” 🇺🇸
Both are correct. The meaning is identical.
What Does “Metre / Meter” Mean?
Both words refer to:
👉 a unit of length in the metric system (equal to 100 centimetres)
👉 sometimes used in scientific and technical contexts
Real-life examples:
- The wall is two metres/meters high.
- He ran 100 metres/meters in under 12 seconds.
- The distance is 500 metres/meters away.
There is no difference in meaning—only spelling.
Why Are There Two Spellings?
The difference comes from regional spelling conventions.
British English:
Often uses -re endings:
- metre
- centre
- theatre
American English:
Simplifies to -er endings:
- meter
- center
- theater
So:
👉 British = “re” ending
👉 American = “er” ending
Side-by-Side Comparison
| Feature | Metre 🇬🇧 | Meter 🇺🇸 |
|---|---|---|
| Region | UK, India, Australia | United States |
| Meaning | Unit of length | Unit of length |
| Usage | British English | American English |
| Example | 5 metres | 5 meters |
Important Twist: “Meter” Has Another Meaning
Here’s where it gets interesting.
In American English, meter has TWO meanings:
1. Unit of length
- 10 meters long
2. Measuring device
- parking meter
- electricity meter
- gas meter
Example:
- The parking meter expired.
👉 British English uses the same spelling for the device too:
- parking meter (UK spelling still uses “meter” for devices)
So:
- Metre = only length (British spelling)
- Meter = length + measuring device (American spelling)
Real-Life Examples
Length / Distance
- The pool is 25 metres long. 🇬🇧
- The pool is 25 meters long. 🇺🇸
Sports
- He won the 100 metres race. 🇬🇧
- He won the 100 meters race. 🇺🇸
Devices
- The parking meter is broken. (both English types)
- Electricity meter readings are checked monthly.
Simple Trick to Remember
👉 “RE = British style”
👉 “ER = American style”
Or even simpler:
- Metre → British spelling (re ending)
- Meter → American spelling (er ending)
Memory shortcut:
👉 “re = UK, er = US”
Common Mistakes to Avoid
- Mixing both spellings in one document ❌
- Thinking one spelling is wrong ❌
- Forgetting that “meter” also means a device ❌
Examples:
- The race is 100 meters, but the text also says 100 metres. ❌
- The race is 100 metres. 🇬🇧
- The race is 100 meters. 🇺🇸
Which One Should You Use?
Use “Metre” if:
- You follow British English
- Your audience is UK, India, Pakistan, Australia, etc.
- Your writing is academic or formal in Commonwealth English
Use “Meter” if:
- You follow American English
- Your audience is US-based
- You write in AP or US style
A Helpful Pattern to Notice
This is part of a bigger spelling trend:
| British | American |
|---|---|
| metre | meter |
| centre | center |
| litre | liter |
Once you see this pattern, English spelling becomes much more predictable.
Quick Memory Check
Which is British English?
- Meter ❌
- Metre ✅
Correct answer: #2
Conclusion
The difference between metre vs meter is simple:
- Metre → British English spelling (unit of length)
- Meter → American English spelling (unit + measuring devices)
👉 Quick trick: “RE = UK, ER = US.”
Both are correct you just need to match your audience and stay consistent in your writing.