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Tools

Free tools on 4AB that you can open and use straight away: calculators, the periodic table, the question bank and more.

9 things to open

ABC Chemistry Calculator

Free online calculator suite for chemistry, physics, maths and accounting — molar mass, equation balancer, periodic table, pH, kinematics, derivatives and more.

Interactive Periodic Table

A premium, interactive periodic table of all 118 elements. Tap any element for atomic mass, electron configuration, physical and chemical data — then open…

Symmetry Lab

Point groups in 3D

Chemistry Question Bank

5,200+ PYQs + AI checker

Questions by exam and year

CSIR-NET papers year by year, and the GATE and IIT-JAM collections.

Notes maker

Make revision notes from the question bank.

Teaching whiteboard

Open a question from the bank on a whiteboard to teach it.

BP & Sugar Tracker

Record blood pressure, blood sugar, pulse, weight, medicines, meals, activity, sleep and symptoms in one place.

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Tell us about a wrong answer, a broken page or a payment problem. One short form, no login.

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