Engineering Tools & Formulas

Hendesika

In-app purchases

About this app

SimulaSheet is an engineering calculator and formula toolbox for mechanical, materials, civil and electrical engineering, hydraulics, pneumatics and automation. Every formula names its source, every calculation is tested against solved examples from the literature, and every result is drawn as a live technical drawing that responds to your inputs.

CALCULATIONS BY FIELD
• Strength of materials: beam calculator with deflection, shear and bending moment diagrams
• Machine elements: bolt torque and preload, shafts, keys, springs, welds, gears, belts, chains
• Bearings: basic and modified bearing life
• Mechanisms: four-bar linkage, slider-crank, cam, Geneva drive, rack and pinion, planetary gears
• Metallurgy and materials: iron–carbon diagram, Jominy hardenability, case depth, corrosion
• Hydraulics and pneumatics: cylinder force, pumps, accumulators, air consumption, valve flow
• Automation: encoder resolution; pneumatic, hydraulic and electrical symbols
• Tolerances: ISO 286 tolerance calculator, limits and fits
• Civil: reinforced concrete section, concrete mix, foundations, load combinations
• Electrical: cable size and voltage drop, motors, transformers, reactive power
• Engineering unit converter: metric and US units

WHAT'S INSIDE
• 23 categories, 80+ calculation modules, 230+ solved cases
• Strength of materials: beams, torsion, buckling, combined stress with Mohr's circle, fatigue, fracture mechanics, contact stress
• Tolerances and fits: ISO 286 limits computed from the standard's formulas — not copied tables
• Machine elements: bolted joints and preload torque, welds, springs, keys and pins, bearing life, gears, belts and chains
• Thermal: expansion, thermal stress, conduction, convection, heat exchangers
• Fluids and pressure: pipe flow, pumps, pneumatics, hydraulics, pressure vessels
• Electrical: cables and voltage drop, motors, transformers, AC power
• Manufacturing: punching, bending, cutting data, deep drawing
• Dynamics, vibration, linear motion, power transmission, automation, corrosion, heat treatment, mechanisms and more
• Materials library: 55 engineering materials with composition, properties and standard equivalents
• Unit converter one tap away on every screen; metric and US units

DRAWINGS, NOT DECORATION
Every calculation is illustrated with a parametric technical drawing — supports, load arrows, dimension lines, section views — redrawn live as you change the inputs. Nothing is a stock image.

TRUST THE NUMBERS
Every formula carries a citation (book or standard, down to the chapter or equation). Every module ships with tests against solved examples from the references. Where a value cannot be derived from a formula, the app says so instead of guessing.

YOURS, OFFLINE
• Works fully offline — the app makes no network connection of its own
• No ads, anywhere, ever
• No account, no sign-up, no tracking, no analytics SDKs
• 16 languages

FREE AND PRO, HONESTLY
More than half of the calculations, all reference guides, all catalogues and every drawing are free — no time limits. Pro is a single one-time purchase that unlocks every calculation case (today's and future ones), PDF calculation reports, saved projects, unlimited favorites and history, the professional sections of material cards, comparison tools and custom materials. No subscription.

BUILT FOR
Mechanical, civil and electrical engineers, technicians, machinists, maintenance crews and engineering students.

Found a mistake or missing a calculation? Tell us — an app built on cited sources is an app where fixes land fast.

What’s new

• Result numbers can now be copied: long-press a number and choose Copy from your phone's own menu.
• A long-press takes the whole number — minus sign, decimals and exponent included, the unit left out — so it pastes exactly as shown.
• To paste into the Unit converter, long-press the number already in its field, then choose Paste.