⚗ K2 SimLab
Open to everyone · free access

Science you can take apart

Physics and chemistry simulations you drag, tune and deliberately break. Every model runs on the real equations underneath, so it stays honest even when you push it somewhere strange.

Built for Class XI and XII, matched to CBSE and ISC.

Nothing to install · works on a phone or a lab computer

0simulations live
XI–XIICBSE & ISC
Monthlynew releases
Freeto use right now
The library

Two subjects, one library

Every one is a self-contained instrument. Change an input and every figure on screen recomputes — nothing is stored, nothing is pre-recorded.

See all 21 simulations →
Why these are different

The science is computed, not drawn

01

Real equations underneath

Trajectories are integrated step by step, orbital shapes come from the wavefunction, dipoles are summed as vectors. Enter an unexpected value and it still answers correctly, because nothing was decided in advance.

02

The working is always shown

Each simulation lays out the derivation using your own numbers, in the order you would write it in an exam. Getting the answer is not the point — reproducing it is.

03

Being wrong teaches something

Release the package too early and it visibly falls short of the target. Fit the wrong reagent and nothing happens. The mistake is demonstrated, not just marked.

04

Built by someone who teaches this

Every one began as a lesson that was hard to land on a blackboard. Zero error, limiting reagent, why a negative correction makes an answer larger — the awkward corners are the whole reason these exist.

If you teach

  • Project any simulation and change values live while you explain
  • Set a class the same puzzle and compare their scores
  • Nothing to install — a browser and a link is the whole requirement
  • Keeps working once the page has loaded, so a weak lab connection is not fatal

If you are studying

  • Practise the practical exams — vernier, screw gauge — as often as you like
  • Check your own working line by line against the panel
  • Play the puzzle modes when you cannot face another problem set
  • Matched to the CBSE and ISC syllabus, not a foreign board

Open to everyone while it is being built

I would rather have a thousand students actually using these than a handful of people watching from a distance. So the whole library is open.

  • Every simulation is free to use — physics and chemistry, Class XI and XII.
  • New ones keep arriving, and you get them as they land.
  • Tell me what to build next. Requests from early users decide the order I work in.