Cards on a grid
Each value, formula, title or note is a card. Arrange them in two, three or four columns and drag them wherever reads best: a card can use a value from any other card.
TOOL 08 / WORKSHEET
A calculation sheet that recalculates itself.
Lay a problem out as cards on a grid: givens, formulas, results, notes and graphs. Change one value and every card that uses it follows.
No account required · Right in your browser · Works offline once opened
SLIDE RULE / WorksheetSCREENSHOT
WHAT IT DOES
The tidy version of your working.
Somewhere between a calculator history and a typeset report: everything on one page, in order, and still live.
Values keep their units
Write F = 2 kN and L = 1.5 m, then M = F × L to kN m. Units are carried through each formula and converted to the ones you ask for.
Change one, update all
Edit a given and every result that depends on it recalculates, which turns a worked problem into something you can reuse for the next one.
Working on any card
Each calculation has a Steps button that opens its working underneath, or show the working of the whole sheet at once.
Graphs and more, in place
A graph card can plot functions, a 3D surface or a table of data, work out a probability or a hypothesis test, or solve a differential equation, using any value on the sheet by name.
Fed by the other tools
Add to worksheet appears throughout Slide Rule: on a calculation, a formula result, a reference value, a graph, a test. Each arrives as a card.
THE EXAMPLE SHEET
A cantilever beam, card by card.
Every new visitor has this sheet to try. These are its cards and the results they show.
- THE CARD SAYSIT SHOWSWHAT IT IS
F = 2 kN, L = 1.5 m, E = 200 GPathree givensThe load, the length and the elastic modulus of steel.b = 50 mm, h = 100 mmtwo moreThe width and depth of the rectangular section.I = b × h³ / 12= 4166666.667 mm⁴The second moment of area, from the two cards above.δ_tip = F × L³ / (3E × I) to mm= 2.7 mmThe tip deflection, converted to millimetres as asked.M_max = F × L to kN m= 3 kN mThe largest bending moment, at the wall.σ_max = M_max × (h/2) / I to MPa= 36 MPaThe largest bending stress.
FREE AND PRO
Start on the free plan. Hand it in with Pro.
The free plan has one worksheet of your own, with up to 12 cards and one graph card, beside the example. That is enough for a tutorial problem.
Pro removes the limits: as many worksheets, cards and graphs as you like. It also adds export: a PDF where no card is cut across a page, a printout through your browser, or LaTeX to drop into a report.
New accounts get 14 days of Pro with no card asked for. Students with an address from their place of study pay A$9.99 a month or A$79.99 a year. See the plans.
FREE
- One worksheet
- Up to 12 cards
- One graph card
- Units and live results
- Step-by-step working
PRO
- Unlimited worksheets
- Unlimited cards and graphs
- Save as PDF
- Export LaTeX
QUESTIONS
Before you open it.
How is this different from a spreadsheet?
Formulas are written as mathematics and stay visible, values are called by name rather than by cell, and units are checked and converted for you. It reads like the working you would hand in.
Is my worksheet saved?
Yes. Without an account it is kept in your browser. Sign in and it is saved to your account, so it is there on any device you sign in on.
What happens to my sheets if I stop paying for Pro?
They all stay, and each can still be opened and edited. The free plan only limits what can be added: new worksheets beyond the first, and cards or graphs beyond the free allowance on a sheet.
Can I export to LaTeX or PDF?
With Pro, yes: press Export, choose the layout, then Save PDF, Print or save a .tex file.
One of eight tools that work together.
A value from one goes straight into another- CalculatorScientific and symbolic, with the steps behind each answer.
- Unit converterEvery unit of a quantity at once, and compound units.
- ReferenceConstants, materials, steam tables and section properties.
- FormulasOver 200 formulas, each solvable for any quantity.
- Graph2D curves, 3D surfaces and curve fitting to data.
- SolversMatrices and systems with working, and differential equations.
- StatisticsDistributions and hypothesis tests with confidence intervals.
- The whole toolkit →See how the eight tools fit together, and what is free.
Working worth keeping.
Open a worksheet — Free ↗No account required. Free for every tool; Pro adds unlimited worksheets and exports.