Natural math. Connected thinking.

Engineering math.
In its natural form.

From your first equation to a calculation you can explain. Write readable math, keep units connected, and work alongside your own AI.

Explore beta access See how it works

No card required. No automatic paid renewal.
Your documents stay yours to download and edit.

CALCULATION NOTE / 01ILLUSTRATIVE EXAMPLE

A clear line of reasoning.

Cantilever · tip load · x right, y up, +z out of page

FLxy+z ⊙
F:=2 kNMagnitude of the tip load in −y.
L:=1.5 mLength of the cantilever along +x.
Mz:=−F·L=−3 kN·mApplied moment about +z at the fixed end.
Readable mathUnits and reasoning, together.

A sample calculation, not a certified design or a live editor.

Write the way you think.Fractions, powers, subscripts and physical units.
Bring the AI you choose.Use your own AI account. Review every change.
Keep a calculation you can revisit.Editable local files and browser-produced PDF output.
From thinking to understanding

The equation is only
part of the story.

Good engineering makes the reasoning visible. Keep assumptions, formulas, explanations and checks in one readable document.

Build a calculation you can read.

Start with inputs and units. Add formulas, explanations, figures and explicit checks on the sheet.

Invite your own AI into the work.

Use documented file exchange or explicitly connect an active worksheet. Your AI drafts; you inspect and refine.

Change an input. Follow the result.

Recalculate, review dimensions, and save the editable file locally. Prepare A4 output when you are ready.

Your judgement stays at the centre

Let AI help with the draft.
Keep the engineering in your hands.

The calculation engine validates and recalculates document data. You decide whether the model, assumptions and conclusions are appropriate. Your own AI provider's account, terms and fees remain separate.

Discover the beta ↗
A considered place to start

Explore the beta.
No surprise subscription.

EARLY ACCESS

Beta trial

Free

14 days of access after email verification.
Availability depends on beta enrolment.

  • Natural math notation and unit-aware calculations
  • Editable files saved on your own device
  • Your own AI account, under your control
  • A visible monthly request allowance
Check beta availability ↗

No payment details. Access expires unless extended.
No automatic conversion to a paid plan.

PLANNED

Professional

Coming later

A subscription for regular engineering work. Pricing and launch date are still being decided.

  • Subscription billing through Stripe is planned
  • Price, tax and renewal terms before purchase
  • Online subscription management
  • Fair-use terms made clear in advance

Paid subscriptions are not available in this beta.
No purchases or payment collection on this site.

A few good questions

Before you begin.

Is an AI subscription included?

No. You use your own AI account, where supported. Availability depends on your provider and account. Calculator never asks for your AI provider's password.

Where are my calculations stored?

Documents are processed temporarily in server memory. Calculator does not store or log documents, images, file names or engineering text. Download your editable file before closing the tab. Account details, licences and request counters are stored separately. Your AI provider may retain material you send to it.

What happens when my trial ends?

Access expires. No card is required and no paid subscription starts automatically. You can view your account and contact support about access. A signed-in open tab can still download its editable document after access or quota expiry.

Can I use the beta for engineering decisions?

You remain responsible for checking assumptions, source data, units, formulas and results. This beta is under development and is not engineering certification. Evaluate it using non-sensitive test work before adopting it into a professional workflow.