How Far Should You Be Able to Read a Number Plate?

How Far Should You Be Able to Read a Number Plate?

It’s one of the first things you do when you take your driving test — stand back, look at a number plate, and read it aloud. But it’s not just a one-off check. Being able to read a number plate from 20 metres away is a legal requirement for all drivers in the UK — whether you passed your test last week or 30 years ago.

Here’s what you need to know.

What’s the legal eyesight requirement for driving?

To drive legally in the UK, you must be able to read a car number plate from 20 metres away. That applies to both the practical driving test and your ongoing fitness to drive.

If you wear glasses or contact lenses, no problem — you just need to make sure you’re wearing them every time you get behind the wheel.

How far is 20 metres, exactly?

Twenty metres is roughly:

• About five car lengths

• Around eight standard parking bays

If you want to check your distance, try pacing it out in a car park or use a measuring app. Then see if you can clearly read a nearby number plate from that spot.

How do I test my eyesight at home?

You can do a quick check yourself:

1. Find a parked car with a clean number plate.

2. Measure out 20 metres from the back of the car (use a tape measure or count 20 large steps).

3. Try to read the number plate clearly from that spot.

4. If you wear glasses or contact lenses, test with and without them to see if there's a difference.

If you’re struggling to make it out, it’s a good idea to book in for an eye test.

What if I can’t read the plate?

If you can’t read a number plate from 20 metres, you shouldn’t be driving until your eyesight is corrected. Driving with poor vision could lead to:

• Fines

• Penalty points

• Losing your licence

• Being held responsible for an accident

A regular eye check is quick, easy, and could help avoid bigger problems later on.

Do I need to tell the DVLA if I wear glasses?

No — not just for wearing glasses or contacts. But if you have a diagnosed eye condition or have been advised that your vision doesn’t meet the legal standard, you must inform the DVLA.

Failing to report an eyesight-related issue that affects your ability to drive safely is a serious offence, and could affect your insurance as well.

The takeaway

To drive legally in the UK, you need to be able to read a number plate from 20 metres. It's a simple check, but an important one — and it’s not just for learners or the day of your test.

If you're unsure about your eyesight, it’s worth doing a quick check or seeing an optician. It helps keep you safe, and it’s one of the easiest ways to stay on the right side of the law.

Need help with driver requirements or leasing with a medical condition? The Motorlet team’s always here to help. Just get in touch.