---
title: "Measuring length (age 7+)"
description: "Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, metre sticks, and measuring tapes"
canonical: https://lightmysky.com/learn/mathematics/measuring-length-age-7-mt_e4x3l2JeLI
source: https://lightmysky.com/learn/mathematics/measuring-length-age-7-mt_e4x3l2JeLI.md
retrieved: 2026-10-19
---

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# Measuring length (age 7+)

Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, metre sticks, and measuring tapes

Subject: Mathematics · Area: Measurement · Ages 7 to 8
Page: https://lightmysky.com/learn/mathematics/measuring-length-age-7-mt_e4x3l2JeLI

## Ready when they can

- Choose the most appropriate tool for measuring a given object
- Align the zero mark of a ruler with the end of the object and read the measurement
- Measure lengths in inches, feet, centimetres, and metres using the correct tool

## Lesson: Picking the right tool to measure length

You already know how to measure with a ruler. A ruler is great for a pencil or a book. But some things are too long for a short ruler. For those, you need a longer tool: a yardstick, a metre stick, or a measuring tape.

*(drawing: Line up the ribbon's end with the 0 mark. Read where the other end lands: 9 cm.)*

**Example.** Ana needs to measure a piece of fabric that is about 80 cm long. Her ruler only goes up to 30 cm, so she picks a measuring tape instead. She lines up the zero end of the tape with one edge of the fabric and reads 80 cm at the other edge.

**Tip.** Always start at the 0 mark, not the edge of the ruler. And match the tool to the job: short ruler for small things, tape measure or metre stick for long ones.

**Recap.** Pick a tool long enough for the job, line up its zero mark, and read the length in the right unit.

## Practice

17 questions on this page, each with its working shown.

## Needs first

- [Measuring length (age 6+)](https://lightmysky.com/learn/mathematics/measuring-length-age-6-mt_cqSf213hSa)
- [Choosing measurement units](https://lightmysky.com/learn/mathematics/choosing-measurement-units-mt_DOe893F6gN)

## Opens up

- [Understanding Area](https://lightmysky.com/learn/mathematics/understanding-area-mt_6xNmQLzuqm)
- [Measuring with different units](https://lightmysky.com/learn/mathematics/measuring-with-different-units-mt_jHv4BgRK8B)
- [Measuring & Plotting Lengths](https://lightmysky.com/learn/mathematics/measuring-and-plotting-lengths-mt_mayItsxMUu)
- [Choosing the right strategy](https://lightmysky.com/learn/mathematics/choosing-the-right-strategy-mt_mQcWGh02no)
- [Estimating Lengths](https://lightmysky.com/learn/mathematics/estimating-lengths-mt_OzRZ89GrQW)
- [Comparing lengths by measuring](https://lightmysky.com/learn/mathematics/comparing-lengths-by-measuring-mt_xWg0lI_gG4)