How to Calculate Median: A Step-by-Step Guide
Finds the middle value of a list.
These calculations come up in school, at work and in daily life, from PSLE and O-Level practice to measuring a room for new flooring. Doing them by hand builds understanding, and a calculator lets you check the answer instantly.
What you need
- Numbers (separated by commas)
Step by step
- Enter the numbers (separated by commas).
- The results update as you type, or press Calculate.
- Read the median first, then the supporting figures below it.
The formula
Sort the values; take the middle one (or the average of the two middle values).
Worked example
For example, with these inputs:
- Numbers (separated by commas): 12, 15, 9, 22, 15, 30
the calculator returns:
- Median: 15
Practical tips
- Write down the formula before plugging numbers in; it prevents mixing up variables.
- Keep units consistent: convert everything to the same unit before calculating.
- For exam work, show your method; marks are often given for working, not just the answer.
- Use brackets to make the order of operations explicit.
Background
A quick mental estimate before calculating is a powerful check. If a room's floor area comes out at 4,000 square metres or a percentage comes out above 100% when it should not, you know to look again.
These calculations appear throughout the Singapore syllabus, from primary school percentages and fractions to secondary school algebra and geometry. Understanding the formula makes problem sums easier because you can recognise which quantity is missing.
In everyday life the same maths shows up in discounts, recipe scaling, renovation measurements and comparing prices per unit. Being comfortable with it saves money and avoids costly measuring mistakes.
Related calculations
- Volume of a Hemisphere Calculator: Calculates the volume of a hemisphere from the measurements you enter.
- Surface Area of a Cube Calculator: Calculates the surface area of a cube from the measurements you enter.
- Surface Area of a Cuboid Calculator: Calculates the surface area of a cuboid from the measurements you enter.
- Surface Area of a Sphere Calculator: Calculates the surface area of a sphere from the measurements you enter.
Want to skip the arithmetic? The free Median Calculator does all of this instantly and updates as you type.
Run your own numbers: Median Calculator