Measuring with Hands and Feet
Before using a ruler or tape, we can measure things with our own body parts! In Class 1, children learn to measure length using hand-spans, footsteps, and arm lengths. These are called non-standard units of measurement.
This is how people measured things long ago, before rulers were invented.
What is Measuring with Hands and Feet - Class 1 Maths (Measurement (Grade 1))?
Non-standard measurement means measuring with objects that are not rulers or tapes — like hands, feet, paper clips, or pencils.
Common body-part measures:
| Body Part | How to Use |
|---|---|
| Hand-span | Spread your fingers wide. Measure from thumb to little finger. |
| Footstep | Place one foot in front of the other. Count the steps. |
| Arm length (cubit) | Measure from elbow to fingertip. |
Solved Examples
Example 1: Example 1: Measure a Book
Question: Ria measures her book using hand-spans. She gets 2 hand-spans. How long is her book?
Answer: Her book is 2 hand-spans long.
Example 2: Example 2: Measure the Classroom
Question: Aman walks across the classroom and counts 15 footsteps. How wide is the classroom?
Answer: The classroom is 15 footsteps wide.
Example 3: Example 3: Different Answers
Question: Priya measures a table using hand-spans and gets 6. Dev measures the same table and gets 5. Why are the answers different?
Think:
- Dev's hands are bigger than Priya's
- Bigger hand-spans mean fewer spans needed
Answer: Their hand sizes are different, so the number of hand-spans is different.
Example 4: Example 4: Compare Two Objects
Question: A pencil is 1 hand-span long. A ruler is 2 hand-spans long. Which is longer?
Answer: The ruler is longer (2 > 1).
Example 5: Example 5: Measure with Footsteps
Question: Meera walks from the door to the window: 8 footsteps. From the door to the board: 12 footsteps. Which distance is longer?
Answer: Door to board is longer (12 > 8).
Example 6: Example 6: Arm Length
Question: Arjun measures a table using his arm (elbow to fingertip). He gets 3 arm lengths. His father gets 2 arm lengths. Why?
Answer: His father's arm is longer, so fewer arm lengths are needed to cover the same table.
Example 7: Example 7: Pencil as a Unit
Question: Neha uses a pencil to measure her desk. The desk is 4 pencils long. What is the length?
Answer: The desk is 4 pencils long.
Key Points to Remember
- We can measure with hand-spans, footsteps, and arm lengths.
- These are called non-standard units because they are different for every person.
- A person with bigger hands needs fewer hand-spans to measure the same object.
- Non-standard measurement helps us compare lengths.
- In higher classes, you will use standard units like centimetres and metres.
Practice Problems
- Measure your desk using hand-spans. How many hand-spans long is it?
- Walk from your chair to the door. How many footsteps did it take?
- Measure a book using pencils. How many pencils long is it?
- Aditi gets 8 hand-spans for a table. Rahul gets 6 hand-spans. Who has bigger hands?
- Which is longer — something that is 5 hand-spans or something that is 3 hand-spans?
- Why do two people get different numbers when they measure the same table with their hands?
Frequently Asked Questions
Q1. What is non-standard measurement?
Non-standard measurement means measuring with things like hands, feet, pencils, or paper clips instead of rulers. The units are not fixed because everyone's hands and feet are different sizes.
Q2. Why do different people get different answers?
Because people have different-sized hands and feet. A person with bigger hands needs fewer hand-spans, and a person with smaller hands needs more.
Q3. What is a hand-span?
A hand-span is the distance from the tip of your thumb to the tip of your little finger when your hand is spread wide open.
Q4. Can I use other objects to measure?
Yes. You can use pencils, erasers, paper clips, or blocks. Any small object can be used as a non-standard unit to measure length.
Q5. Why do we not use rulers in this topic?
In Class 1, children first learn the idea of measurement using familiar things like hands and feet. Rulers and standard units (centimetres) are taught in Class 2.
Q6. Is a footstep the same as a foot?
Almost. A footstep means placing one foot in front of the other and counting. The length of each step depends on the size of the person's foot.
