Built for engineers
Everything you reach for, in one place
Strix brings calculators, formula sheets, and reference data across the core areas of engineering into one fast, focused app — so you spend less time searching and more time solving.
Strength Theory
Size beams and columns with confidence — work out deflection, slope, and bending moments across standard load cases, then check members against buckling and fatigue.
- Beam deflection
- Column buckling
- Fatigue & fracture
- Von Mises stress
Machine Elements
Design the parts that fasten and transmit power, backed by standardized component data so your numbers match the catalogue.
- Bolt sizing (VDI 2230)
- Gear & belt ratios
- Circlips (DIN 471/472)
Material
Look up the properties that drive every calculation — from stiffness to strength — without leaving the app.
- Young's & shear modulus
- Yield & tensile strength
- Hardness & density
Math
Go from a quick formula look-up to a full symbolic solution, with step-by-step working you can follow.
- Geometry & trig
- Algebra
- Symbolic calculator
Mechanics
Physics and dynamics reference at your fingertips, plus a deep library of engineering quantities and constants.
- Newton's laws
- Energy & torque
- 200+ quantities
Technical Drawings
Get welds right on the drawing — pick the joint type and let Strix size the weld, including intermittent welds, to your plate thickness.
- Fillet, V, butt & more
- Intermittent welds
- Weld sizing
Tweak formulas.
Save them for next time.
Strix isn't a black box. Formulas and calculations are editable with MATLAB-style code — adjust a value, add your own variables, or build a calculation from the ground up, then store it in your workspace and reuse it whenever you need.
- Familiar MATLAB-style syntax
- Edit built-in formulas — or write your own from scratch
- Save calculations & notes to your personal workspace
- Pick up where you left off, on any device
Variables
Ready to streamline your workflow?
Create your account and put every calculator, formula sheet, and reference table to work on your next design.
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FAQ
What is Strix?
Strix is a digital engineering toolkit for mechanical engineers. It brings calculations, formula sheets, standards data, and reference tables into one application — replacing the workflow of searching through physical handbooks and scattered resources.
What tools and calculators are included?
Strix includes tools for beam deflection (15+ load cases), column buckling, bolt sizing (VDI 2230), weld sizing, gear ratio calculations, circlip reference data (DIN 471/472), cross-section properties, and a unit converter. On the reference side you get formula sheets for math and physics, a library of 200+ engineering quantities, 40+ physical constants, and a symbolic calculator with step-by-step solutions.
Is there a free trial?
Yes. The Personal plan includes a 30-day free trial — no credit card required to get started. You get full access to all tools during the trial period.
What is the difference between the Personal and Organisation plans?
The Personal plan is for individual engineers and includes all calculators, reference tools, and a personal notes workspace. The Organisation plan adds a shared team workspace, seat-based licensing, member invitations, and admin controls — designed for engineering teams and companies.
Latest reviews
Sparar massor av tid!
Jag är kanske lite partisk, men det här verktyget sparar mig tid varje dag på jobbet. Kan varmt rekommendera det till alla ingenjörer.
Lukas
1 april 2026
Väldigt användbart i studierna
Strix har gjort det mycket enklare att ta sig igenom kursmaterialet. Förklaringarna är tydliga och det är lätt att hitta det man behöver.
Celie
15 mars 2026
Bästa hjälpmedlet på länge
Äntligen ett verktyg som faktiskt förstår vad man frågar om. Perfekt för oss som jobbar med hållfasthetsberäkningar dagligen.
Sandra
2 mars 2026