Student toolkit
Eight free tools for Chemistry, Physics, Maths and money questions. Every answer shows its working.
Chemical equation balancer
Type an equation with -> between the sides. Capital letters matter: Co is cobalt, CO is carbon monoxide.
Molar mass and mole calculator
Enter a formula such as Ca(OH)2 or Al2(SO4)3. Add grams to get moles and particles.
pH, pOH and concentration
Pick what you know. Values at 25 °C, where pH + pOH = 14. Write small numbers like 1e-3.
Quadratic equation solver
Solves ax² + bx + c = 0 and shows each step.
Ohm's law and power
Fill any two boxes and leave the others empty.
Ideal gas law (PV = nRT)
Fill three boxes and leave one empty. Units: atm, litre, mole, kelvin. Kelvin = °C + 273.15.
Interest and EMI
Simple interest, compound interest and loan EMI.
EMI uses the principal and rate above, with the loan period in months:
Scientific calculator
Supports + − × ÷ ^ ! % brackets, sin cos tan, log, ln and sqrt.
Study tools
Roz ki padhai ke liye zaroori tools, ek hi jagah.
⏱️ Focus timer
Ek baar start karo aur bina phone dekhe padho.
📊 Marks to percentage
Apne subjects ke marks daalo, percentage aur grade pao.
📅 Exam countdown planner
Exam date aur chapters batao, roz ka target mil jayega.
🃏 Flashcards
Sawal aur jawab save karo. Card par tap karke palto. Browser me save rehta hai.
✅ Aaj ke kaam
Aaj kya padhna hai, likho aur tick karte jao. Browser me save rehta hai.