X Tables
Swimming Maths

Maths in swimming: training sets

Calculate 4 lengths, 8 lengths or 10 lengths.

Quick answer

You can calculate how many lengths of swimming you've done by counting the lengths and adding them up. For example, if you swim 4 lengths, then 8 lengths, then 10 lengths, you have swum 22 lengths in total.

Learning outcome

By the end of this page, you will be able to add up swimming lengths to work out your total training set. Success signs:
  • You can count how many lengths you swim in each set
  • You can add up the lengths to find your total
  • You can use numbers to plan your swimming training
  • You can help your coach or parent understand your swimming plan

Why this matters

Maths helps you understand how much you swim and plan your training. When you know how many lengths you've done, you can:
  • Track your progress over time
  • Plan how many lengths you want to swim each day
  • Work out how long your swim will take
  • Share your training with your coach or family
Swimming is a great way to use maths because it's fun, active, and you can see your numbers in action in the pool!

How it works

When you swim, you do a number of lengths. A length is one trip from one end of the pool to the other. To find your total training set:
  1. Count how many lengths you swim in each part of your training
  2. Add those numbers together
  3. You now know how many lengths you swam in total

Examples you can see

Let's look at some swimming training sets and how to add them up. Example 1: Simple training set
  • First set: 4 lengths
  • Second set: 3 lengths
  • Third set: 5 lengths
To find the total: 4 + 3 + 5 = 12 lengths Example 2: Longer training set
  • Warm-up: 6 lengths
  • Main training: 8 lengths
  • Cool-down: 2 lengths
To find the total: 6 + 8 + 2 = 16 lengths Example 3: Your own training
  • Monday: 10 lengths
  • Tuesday: 5 lengths
  • Wednesday: 7 lengths
To find the total: 10 + 5 + 7 = 22 lengths

Try it as a mini adventure

Adventure: The Swimming Challenge You are a swimming coach who needs to plan a training set for your team. You have three groups of swimmers and each group does a different number of lengths. Group A swims 4 lengths. Group B swims 8 lengths. Group C swims 10 lengths. Task: Calculate how many lengths the whole team swims in total. Step-by-step: 1st time: Group A swims 4 lengths 2nd time: Group B swims 8 lengths 3rd time: Group C swims 10 lengths 4th time: Add them all together 4 + 8 + 10 = ? Answer: 22 lengths Challenge: If each length is 25 metres, how many metres do they swim in total? 22 lengths × 25 metres = 550 metres

Common mistakes

  • Mistake: Forgetting to count one of the lengths Why it happens: When you're swimming, it's easy to get distracted and miss counting one set Fix: Use your fingers or a counter to keep track of each set you swim
  • Mistake: Adding the numbers wrong Why it happens: Sometimes children make simple addition mistakes Fix: Count out loud or use objects like blocks to help you add
  • Mistake: Thinking you've swum more lengths than you actually did Why it happens: When you're tired, it's hard to keep track of numbers Fix: Write down how many lengths you do each time, so you can check your total

Parent and carer guide

Parents and carers can help by:
  • Counting lengths with their child while swimming
  • Writing down how many lengths each swimmer does
  • Using a simple calculator or fingers to add up the total
  • Encouraging children to plan their own training sets
  • Practising addition with other real-life numbers like toys, snacks, or steps
How to help: 1. Ask your child how many lengths they swam today 2. Help them add the numbers together 3. Discuss how many lengths they want to swim tomorrow 4. Use a small notebook to write down their training plan 5. Celebrate their swimming progress with maths! What to watch for:
  • Does your child understand that each length is one trip from one end to the other?
  • Can they count the lengths without getting confused?
  • Do they enjoy using numbers in their swimming?

Practice questions

  1. How many lengths are in 4 + 5 + 3?
  2. What is 6 + 8 + 2?
  3. Calculate 10 + 4 + 6
  4. Find the total of 7 + 9 + 5
  5. What is 3 + 11 + 4?
Answers:
  1. 12 lengths
  2. 16 lengths
  3. 20 lengths
  4. 21 lengths
  5. 18 lengths

FAQ

What is a swimming length?

A swimming length is one trip from one end of the pool to the other end.

How do I keep track of my swimming lengths?

You can count them on your fingers, use a counter, or write them down in a notebook.

Can I use multiplication instead of addition?

Yes! If you swim 5 lengths 3 times, you can multiply: 5 × 3 = 15 lengths.

Why is it helpful to add up swimming lengths?

It helps you track your progress, plan your training, and see how much you've swum.

How long is one swimming length?

One swimming length is 25 metres in a standard pool.