Collaborate
The math whiteboard where formulas compute
Whiteboards are great for thinking; calculators are great for answers. Calcanvas is both: an infinite multiplayer canvas where you sketch, drop in images, and type formulas that calculate live — with real units.
Whiteboards that can't count, calculators that can't draw
Tools like Excalidraw and Miro are excellent for sketching, but a formula on them is just a picture — nothing computes. Math software computes, but locks you into a rigid document with nowhere to think. Real working sessions need both at once: the free-body diagram and the beam formula, the circuit sketch and the power budget, the problem statement and the derivation.
On Calcanvas every math cell is live. Type delta = P*L^3 / (3*E*I) next to your sketch and it evaluates with units carried through — newtons and millimetres collapsing to a deflection in mm. Change P and dependent cells recompute. The unit-aware engine flags dimensional mistakes the moment they happen.
Built for working together
Worksheets are multiplayer by default: open a project, and everyone in it edits the same canvas with live presence cursors. An engineering team can review a calculation together with the reviewer's comments sketched right next to the math. A tutor can watch a student derive — and point at — the exact step where units went wrong. A study group can split a problem set across one infinite canvas instead of six photos of six notebooks.
Because it runs entirely in the browser, sharing a worksheet is a link — no installs, no version mismatches, no license seats. If you are coming from desktop calculation tools, see how Calcanvas compares as a Mathcad alternative.
FAQ
Frequently asked questions
How is this different from Miro, Excalidraw, or tldraw?
General-purpose whiteboards treat math as static text or images. On Calcanvas, a formula is a live cell: it computes with real units, and downstream cells that share its variables update when it changes. You get the whiteboard and the calculator in one surface.
Can several people edit at the same time?
Yes. Worksheets are real-time multiplayer — collaborators see each other's cursors and edits live on the same canvas.
Does it work for tutoring or studying together?
Yes. A tutor and student can share one canvas: sketch the problem, write the formulas next to it, and watch them compute with units — which catches the classic mistake of dropping or mixing units mid-derivation.
Is the whiteboard free?
Yes — Calcanvas is free while in early access, with no credit card required.