JEE Main 2027 Important Formulas: Physics Chemistry Maths All-in-One
JEE Main 2027 important formulas are the core equations from Physics, Chemistry and Maths that you must remember to solve questions quickly and accurately. The most useful ones include Newton's laws, work-energy, electrostatics and optics in Physics; the mole concept, thermodynamics, equilibrium and electrochemistry in Chemistry; and quadratic equations, sequences, trigonometry, coordinate geometry, calculus and probability in Maths. This guide gives all of them in one place, with simple tables and revision tips.
Why JEE Main Important Formulas Matter
JEE Main is a speed-based exam. You get 75 questions across three subjects, and every minute counts. If you have to derive a formula during the test, you lose time and risk mistakes. When you know the right formula instantly, you can spend your time thinking about the problem instead.
Good formula practice helps you:
- Solve numerical questions faster
- Avoid silly errors in signs and units
- Revise the full syllabus quickly in the last few weeks
- Recognise which formula fits which type of question
Remember, a formula is a tool. First understand where it comes from, then memorise it.
Physics Formulas for JEE
Physics questions are mostly application-based. The table below covers the Physics formulas for JEE that appear again and again.
|
Topic |
Key Formula |
What It Means |
|
Kinematics |
v = u + at; s = ut + ½at²; v² = u² + 2as |
Motion with constant acceleration |
|
Newton's Laws |
F = ma |
Force equals mass times acceleration |
|
Work and Energy |
W = Fd cosθ; KE = ½mv² |
Work done; kinetic energy |
|
Circular Motion |
a = v²/r |
Centripetal acceleration |
|
Gravitation |
F = Gm₁m₂/r²; vₑ = √(2gR) |
Gravitational force; escape velocity |
|
SHM |
T = 2π√(m/k) |
Time period of a spring-mass system |
|
Thermodynamics |
ΔU = Q − W |
First law of thermodynamics |
|
Electrostatics |
F = kq₁q₂/r²; V = kq/r |
Coulomb's law; electric potential |
|
Current Electricity |
V = IR; P = VI |
Ohm's law; electric power |
|
Magnetism |
F = qvB sinθ |
Force on a moving charge |
|
Optics |
1/v − 1/u = 1/f; n = c/v |
Lens formula; refractive index |
|
Modern Physics |
E = hν; λ = h/mv |
Photon energy; de Broglie wavelength |
Quick tips for Physics:
- Always check units and dimensions before finalising an answer.
- Learn the sign conventions for mirrors, lenses and motion.
- Practise numerical problems, since they carry equal weight with MCQs.
Chemistry Formulas for JEE
Chemistry has three parts: Physical, Inorganic and Organic. Physical Chemistry is formula-heavy, so these Chemistry formulas for JEE deserve special attention.
|
Topic |
Key Formula |
What It Means |
|
Mole Concept |
n = mass / molar mass |
Number of moles |
|
Concentration |
Molarity = moles of solute / litres of solution |
Strength of a solution |
|
Gas Laws |
PV = nRT |
Ideal gas equation |
|
Atomic Structure |
E = −13.6 Z²/n² eV; r = 0.529 n²/Z Å |
Bohr model energy and radius |
|
Thermodynamics |
ΔG = ΔH − TΔS |
Spontaneity of a reaction |
|
Equilibrium |
Kp = Kc(RT)^Δn; pH = −log[H⁺] |
Equilibrium constants; acidity |
|
Chemical Kinetics |
t½ = 0.693/k; k = Ae^(−Ea/RT) |
Half-life (first order); Arrhenius equation |
|
Electrochemistry |
E = E° − (0.0591/n) log Q; ΔG° = −nFE° |
Nernst equation at 298 K; free energy |
|
Solutions |
ΔTb = Kb·m; π = CRT |
Boiling point elevation; osmotic pressure |
Inorganic and Organic Chemistry depend more on concepts than formulas. For these, focus on periodic trends, NCERT-based facts, hybridisation, named reactions and reaction mechanisms. Make short notes with reaction flow charts, since they are quick to revise.
Maths Formulas for JEE
Maths is often the most scoring and the most time-consuming section. These Maths formulas for JEE cover the chapters with the highest practice value.
|
Topic |
Key Formula |
What It Means |
|
Quadratic Equations |
x = [−b ± √(b² − 4ac)] / 2a |
Roots of ax² + bx + c = 0 |
|
Roots Relation |
Sum = −b/a; Product = c/a |
Link between roots and coefficients |
|
Arithmetic Progression |
Tₙ = a + (n − 1)d; Sₙ = n/2 [2a + (n − 1)d] |
nth term and sum |
|
Geometric Progression |
Tₙ = arⁿ⁻¹; Sₙ = a(rⁿ − 1)/(r − 1) |
nth term and sum |
|
Trigonometry |
sin²θ + cos²θ = 1; sin(A + B) = sinA cosB + cosA sinB |
Basic identity; addition formula |
|
Coordinate Geometry |
d = √[(x₂ − x₁)² + (y₂ − y₁)²]; x² + y² = r² |
Distance; circle equation |
|
Calculus |
d/dx (xⁿ) = nxⁿ⁻¹; ∫xⁿ dx = xⁿ⁺¹/(n + 1) + C |
Differentiation; integration |
|
Permutation and Combination |
nCr = n! / [r!(n − r)!] |
Number of selections |
|
Binomial Theorem |
T(r+1) = nCr xⁿ⁻ʳ yʳ |
General term |
|
Probability |
P(A ∪ B) = P(A) + P(B) − P(A ∩ B) |
Probability of A or B |
|
Vectors |
a·b = ab cosθ |
Dot product (a and b are magnitudes) |
Maths needs practice more than memory. Solve at least a few questions from each chapter right after you revise its formulas.
Which Formulas Should You Learn First?
Not every formula carries the same value. Use this simple priority guide when time is short.
|
Priority |
Approach |
Examples |
|
High |
Learn first and revise weekly |
Kinematics, Electrostatics, Mole Concept, Equilibrium, Calculus, Coordinate Geometry |
|
Medium |
Revise every two weeks |
SHM, Optics, Kinetics, Electrochemistry, Probability, Vectors |
|
Low |
Revise before mock tests |
Rarely asked derived results and long special cases |
JEE Revision Notes: How to Revise Formulas Smartly
Good JEE revision notes save you hours in the final month. Here is a simple method that works.
- Make one formula sheet per chapter. Write the formula, its meaning, units and one example use.
- Use the 1-7-30 rule. Revise a topic after one day, then after seven days, then after thirty days.
- Test yourself. Cover the right side of your table and try to write each formula from memory.
- Use previous year questions. Solve chapter-wise PYQs so you learn where each formula is applied. Solved paper books from publishers such as Oswaal Books can help you practise in exam style.
- Review mistakes weekly. Keep a small list of formulas you often forget and read it every day.
Common Mistakes to Avoid
- Memorising formulas without understanding the conditions where they apply
- Mixing up units, such as cm with m or joules with kilojoules
- Ignoring sign conventions in optics, thermodynamics and motion
- Skipping Chemistry formulas because they look fewer than Physics
- Making very long notes that are too big to revise before the exam
Summary
JEE Main 2027 important formulas are the base of fast and accurate problem-solving. Physics needs strong command over mechanics, electricity and optics formulas. Chemistry needs a good grip on mole concept, thermodynamics, equilibrium and electrochemistry, along with concept-based revision of Inorganic and Organic. Maths needs regular practice in algebra, trigonometry, coordinate geometry, calculus and probability. Use the tables above to build your own JEE revision notes, revise with the 1-7-30 rule, and practise previous year questions to turn formulas into marks.
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FAQs
Physics and Maths have the most formulas. Physical Chemistry also has a good number, while Inorganic and Organic Chemistry rely more on concepts and facts.
Understand the logic first, then write each formula daily on a one-page sheet. Use the 1-7-30 revision rule and practise questions so that the formulas stay in your memory.
No. You are expected to remember the formulas, so regular revision is important.
NCERT is essential, especially for Chemistry. However, you also need practice books and previous year questions to learn how formulas are used in JEE-level problems.
If you already know the syllabus, around three to four weeks is enough for a complete formula revision with regular practice. Start earlier if your basics are weak.
The best notes are the ones you make yourself. Keep them short, chapter-wise and full of formulas, key points and common mistakes.
