List of Maths Formulas for Class 8th CBSE

Important of Maths Formulas for Class 8

Most of the student consider mathematics as a nightmare and math formulas are generally difficult to grasp when you don’t understand them well. The negative attitude towards any of your subjects will make you reluctant to study that particular subject.

Most of the times, student feel nervous during their exams and they are not able to give their best shot. To make you more confident in the study and help you through different concepts in Maths, we will discuss the important math formulas for class 8 here.

When you understand the logic behind each mathematics topics then it would be easier to solve the most complex problems too. For a perfect idea, we will explain you the formulas chapter-wise and we will give you topics how can you score maximum marks in class 8th exams.

Geometry Shapes Formulas for Class 8

Name of the SolidLateral / Curved Surface AreaTotal Surface AreaVolume
Cuboid2h(l+b)\(2\left ( lb+bh+hl \right )\)\(lbh\)
Cube\(4a^{2}\)\(6a^{2}\)\(a^{3}\)
Right Prism\(Perimeter \; of \; base \times height\)\(Lateral \; Surface \; Area + 2(Area \; of \; One \; End)\)\(Area \; of \; Base \times Height\)

Right Circular Cylinder\(2\pi rh\)\(2\pi r \left (r+h \right )\)\(\pi r^{2} h\)
Right Pyramid\(\frac{1}{2} Perimeter \; of \; Base \times \; Slant Height\)\(Lateral \; Surface \; Area + Area \; of \; the \; Base\)\(\frac{1}{3}(Area \; of \; the \; Base) \times height\)
Right Circular Cone\(\pi rl\)\(\pi r \left (l+r \right )\)\(\frac{1}{3}\pi r^{2}h\)
Sphere\(4\pi r^{2}\)

\(4\pi r^{2}\)\(\frac{4}{3}\pi r^{3}\)
Hemisphere\(2\pi r^{2}\)

\(3\pi r^{2}\)

\(\frac{2}{3}\pi r^{3}\)

Algebraic Identities For Class 8

\((a+b)^{2}=a^2+2ab+b^{2}\)
\((a-b)^{2}=a^{2}-2ab+b^{2}\)
\(\left (a + b \right ) \left (a – b \right ) = a^{2} – b^{2}\)
\(\left (x + a \right )\left (x + b \right ) = x^{2} + \left (a + b \right )x + ab\)
\(\left (x + a \right )\left (x – b \right ) = x^{2} + \left (a – b \right )x – ab\)
\(\left (x – a \right )\left (x + b \right ) = x^{2} + \left (b – a \right )x – ab\)
\(\left (x – a \right )\left (x – b \right ) = x^{2} – \left (a + b \right )x + ab\)
\(\left (a + b \right )^{3} = a^{3} + b^{3} + 3ab\left (a + b \right )\)
\(\left (a – b \right )^{3} = a^{3} – b^{3} – 3ab\left (a – b \right )\)
Geometric AreaGeometric Area Formula
Square\(a^{2}\)
Rectangle\(ab\)
Circle\(\pi r^{2}\)
Ellipse\(\pi r1\: r2\)
Triangle\(\frac{1}{2}bh\)

Chapter-wise Marks in Exam

The first step how to start your study in 8th class is checking the complete syllabus and where to start to ease out the preparation. The class 8th is a very crucial stage in your life where students learn the maximum number of concepts for different subjects and apply them later for real-life applications too. This is the right time to make a foundation for future studies.

To prepare for class 8th exams, you first check the complete syllabus from NCERT book and chapter-wise weight age. Spend more time on the topics having high weight age of marks. Obviously, your class teacher also helps you at every stage but don’t forget to prepare your own strategy and work on the same norms. Before we move ahead, here is a quick look at chapter-wise marks in exams for class eighth.

Chapter of Maths for Class 8

Chapter-wise Maths Formulas for Class 8″

Maths play a vital role in preparing you for the competitive exams and higher studies too. As we know that CBSE board has changed the curriculum for class 8th after many years. So, this is necessary for you to understand the different topics and their weight age as discussed earlier. Also, you should be mentally prepared how to score well in the exam with the right strategy. Here, we will discuss the tips that will be helpful for you for exams and score well as needed.

  • First of all, you should prepare a notebook where all important mathematical formulas are noted down and revise them from time to time especially before your exams.
  • Practice is the key to success. The more will you practice, there is a huge chance of getting success in your career.
  • Try to solve the maximum CBSE papers in one sitting and check your level where you need to improve to score well.
  • Also, spend more time on the topics having more weight age.
  • When you solve previous year sample papers, it will increase your overall confidence and makes you the right candidate for tough mathematics problems. Also, you will get a chance to brush up all concepts quickly.
  • Also, don’t just read the topic but practice them wisely. Keep always in your mind that reading maths could not help you. Instead set a fixed time to practice mathematical concepts daily.


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