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About TaskJunction

Built for Everyone, by One Developer

TaskJunction is a free platform with no login, no subscription, no hidden permissions. We offer web apps, Android tools, calculators, converters โ€” all in one place. Every tool is crafted with care and runs locally on your device so your data stays yours. Our mission: make everyday digital tasks easier for everyone.

Free ForeverNo LoginPrivacy FirstWorks Offline
Vaibhav Dhokpande
Vaibhav Dhokpande
Developer & Creator ยท TaskJunction

Hi! I'm Vaibhav โ€” an indie developer passionate about building free, useful tools for everyone. TaskJunction started as a simple idea: make everyday tasks easier. Every app here is crafted with care, zero cost, and no hidden permissions.

โš™๏ธ Engineering Tools
Mechanical Design Calculators

Professional-grade mechanical engineering calculators โ€” pneumatics, gear systems, drive selection, metal weight & pricing, conveyor design and more. All tools run in your browser. No install, no account required.

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Metal Weight & Price Selector

Select from 12 metal shapes and 13 materials. Enter dimensions, quantity and price/kg โ€” live weight & total cost calculated instantly.

Metal ShapesWeight CalcLive Price โ‚น
Open Calculator
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Pneumatic Cylinder Force

Calculate extend & retract forces for pneumatic cylinders. Bore, rod diameter, supply & back pressure. Live cross-section diagram. SI / Imperial toggle.

PneumaticsForce CalcSI + IMP
Open Calculator
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Gear Ratio Calculator

Compute gear ratios, output speed and torque for spur, helical & planetary gear systems. Multi-stage support with live animated visualization.

GearsTorqueSpeed
Open Calculator
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Beam Stress & Deflection

Simply supported, cantilever & fixed beam analysis. Bending stress, shear force diagrams and max deflection.

StructuralBendingDeflection
Open Calculator
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Bolt Torque Calculator

Tightening torque for bolted joints. Metric & UNC/UNF fasteners, friction coefficients and clamp force.

FastenersTorqueMetric
Open Calculator
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Hydraulic Force Calculator

Calculate cylinder extend & retract forces for hydraulic systems. Bore, rod diameter, pressure inputs with SI / Imperial unit toggle.

HydraulicsForce CalcSI + IMP
Open Calculator
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Spring Calculator

Calculate spring constant, deflection, stress and natural frequency for compression, extension & torsion springs. Material library included.

SpringsDeflectionStress
Open Calculator
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Motor & Gearbox Selector

Select the right motor and gearbox by entering linear velocity, RPM, load torque, duty cycle and ambient temperature.

MotorGearboxDrive System
Open Calculator
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Chain Drive Calculator

Design roller chain drives โ€” chain pitch, sprocket teeth, centre distance, chain length, speed ratio and power transmitted.

Chain DriveSprocketPower Trans.
Open Calculator
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Belt Drive Calculator

Calculate V-belt and flat belt drives โ€” belt length, speed ratio, tension, power capacity and centre distance.

Belt DrivePulleyV-Belt
Open Calculator
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Conveyor Calculator

Full conveyor system design โ€” belt speed, capacity, motor power, tension and drive requirements.

ConveyorBelt SpeedCapacity
Open Calculator
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GD&T Calculator

Geometric Dimensioning & Tolerancing calculator โ€” compute true position, flatness, circularity, concentricity and bonus tolerance.

GD&TToleranceTrue Position
Open Calculator
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Hydraulic System Selector

Select the right hydraulic system components โ€” pump type, valve configuration, actuator sizing and fluid lines.

HydraulicsPumpSystem Design
Open Calculator
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Circular Saw Cutting Force

Calculate tangential cutting force, torque, power and feed force for circular saw operations. Supports wood, metal and composite materials.

Cutting ForceSaw BladeMachining
Open Calculator
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Punch & Die Design Calculator

Calculate punch & die clearance, blank size, cutting force, stripper force and tonnage for sheet metal operations.

Punch & DieClearanceSheet Metal
Open Calculator
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Standard Parts Catalog

Read-only reference catalog for standard parts from McMaster-Carr, MISUMI, THK, Carr-Lane, Steel Smith, Destaco and SKF. Search, filter by vendor or category, view full specs and link direct to supplier.

McMaster ยท MISUMI THK ยท SKF Carr-Lane ยท Destaco
Open Catalog
๐Ÿ—๏ธ Civil Engineering Tools
Civil Design Calculators

Professional-grade civil engineering calculators โ€” structural analysis, RCC design, soil mechanics, surveying and more. All tools run in your browser. No install, no account required.

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RCC Beam Design Calculator

Design reinforced concrete beams per IS 456. Calculate moment of resistance, steel area, shear reinforcement and deflection checks.

RCC DesignIS 456Reinforcement
Open Calculator
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Column Design Calculator

Design RCC columns under axial load and biaxial bending. Supports short and slender columns with IS 456 compliance checks.

ColumnAxial LoadBending
Open Calculator
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Soil Bearing Capacity

Calculate safe bearing capacity of soil using Terzaghi's and Meyerhof's equations. Supports strip, square and circular footings.

GeotechnicalBearing Cap.Footing
Open Calculator
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Open Channel Flow Calculator

Compute flow velocity, discharge and Manning's n for trapezoidal, rectangular and circular channels. Includes critical and normal depth.

HydraulicsManning'sDischarge
Open Calculator
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Surveying & Levelling Tool

Calculate reduced levels, height of instrument, contour intervals and area from field survey data. Supports HI and rise-fall methods.

SurveyingRL CalcLevelling
Open Calculator
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Pavement Design Calculator

Design flexible and rigid pavements using IRC methods. Calculate CBR-based thickness, traffic loading and structural layer design.

PavementCBRIRC
Open Calculator
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Retaining Wall Calculator

Analyse cantilever and gravity retaining walls โ€” overturning, sliding, bearing pressure and stability checks with IS 456 code compliance.

Retaining WallStabilityEarth Pressure
Open Calculator
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Water Supply Design Tool

Design water supply networks โ€” pipe sizing, pressure loss (Hazen-Williams), reservoir capacity and daily demand estimation.

Water SupplyPipe SizingPressure
Open Calculator
โšก Electrical Engineering Tools
Electrical Design Calculators

Professional-grade electrical engineering calculators โ€” circuit analysis, power systems, motor design, cable sizing and more. All tools run in your browser. No install, no account required.

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Ohm's Law & Power Calculator

Instantly compute voltage, current, resistance and power. Supports series and parallel circuit configurations with live formula display.

Ohm's LawCircuitsPower
Open Calculator
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Cable & Wire Sizing Calculator

Select the correct cable cross-section for AC/DC loads. Accounts for current capacity, voltage drop, temperature derating and IS 3961 standards.

Cable SizingVoltage DropIS 3961
Open Calculator
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Three-Phase Power Calculator

Calculate active, reactive and apparent power for balanced and unbalanced three-phase systems. Includes power factor correction guidance.

3-PhasePower FactorkVA / kW
Open Calculator
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Induction Motor Calculator

Compute slip, rotor speed, torque, efficiency and starting current for 3-phase induction motors. Full-load and no-load analysis included.

Induction MotorSlipTorque
Open Calculator
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Transformer Design Calculator

Design single and three-phase transformers โ€” turns ratio, core dimensions, copper loss, iron loss and regulation at full load.

TransformerTurns RatioCore Design
Open Calculator
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Short Circuit & Fault Calculator

Calculate symmetrical fault currents, impedance and short-circuit MVA for radial and ring distribution systems per IEC 60909.

Short CircuitFault CurrentIEC 60909
Open Calculator
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Lighting Design Calculator

Calculate lux levels, number of luminaires, spacing and uniformity for indoor and outdoor lighting layouts per IS 3646 standards.

Lux LevelLuminairesIS 3646
Open Calculator
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Battery Bank & UPS Sizing

Size battery banks and UPS systems for given load, backup duration and discharge rate. Supports lead-acid and lithium-ion battery types.

Battery BankUPSBackup Time
Open Calculator
๐Ÿ“ก Electronics Engineering Tools
Electronics Design Calculators

Professional-grade electronics engineering calculators โ€” analog circuits, digital logic, PCB design, signal processing and microcontroller interfacing. All tools run in your browser. No install required.

๐Ÿ”ด
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Resistor & LED Calculator

Calculate current-limiting resistor values for LEDs, resistor colour code decoder and E-series preferred value finder. Supports single and multi-LED strings.

LEDResistorColour Code
Open Calculator
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Op-Amp Circuit Calculator

Design inverting, non-inverting, summing and difference amplifiers. Computes gain, bandwidth and output swing for standard op-amp configurations.

Op-AmpGainBandwidth
Open Calculator
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RC / LC Filter Calculator

Calculate cutoff frequency, impedance and phase response for RC low-pass, high-pass and LC bandpass filters. Bode plot preview included.

RC FilterLC FilterCutoff Freq
Open Calculator
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Number System Converter

Convert between binary, octal, decimal and hexadecimal instantly. Includes 1's complement, 2's complement and BCD encoding for digital design.

BinaryHex2's Comp
Open Calculator
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555 Timer Calculator

Design astable and monostable 555 timer circuits. Compute frequency, duty cycle, pulse width and component values (R1, R2, C) instantly.

555 TimerAstableDuty Cycle
Open Calculator
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PCB Trace Width Calculator

Calculate minimum PCB trace width for internal and external copper layers based on current, temperature rise and IPC-2221 standard requirements.

PCB DesignTrace WidthIPC-2221
Open Calculator
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Voltage Divider & Regulator

Design voltage divider networks and select LM78xx/LM317 regulator output voltages. Computes resistor values, power dissipation and efficiency.

Voltage Div.LM317Regulator
Open Calculator
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ADC / DAC Bit Resolution Tool

Calculate ADC resolution, LSB step size, SNR and dynamic range for 8 to 24-bit converters. Supports unipolar and bipolar reference configurations.

ADC / DACResolutionSNR
Open Calculator
๐Ÿ“š Recommended Resources
Engineering eBooks

Handpicked engineering eBooks across every discipline โ€” from mechanical design to software engineering. Free to explore, no login required.

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โญ Recommended
Mechanical Engineering eBook
Design, manufacturing, thermodynamics, fluid mechanics & material science.
DesignThermoFluids
๐Ÿ“– Read eBook
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โญ Recommended
Fixture Design eBook
Jig & fixture principles, locating schemes, clamping forces, tolerance analysis.
JigsClampingGD&T
๐Ÿ“– Read eBook
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โญ Recommended
BIW Fixture Design eBook
Body-in-White design โ€” stamping, assembly, welding, structural stiffness.
StampingWeldingAuto
๐Ÿ“– Read eBook
๐Ÿ—๏ธ
โญ Recommended
Civil Engineering eBook
Structural analysis, RCC design, surveying, soil mechanics and construction.
StructuralRCC
๐Ÿ“– Read eBook
โšก
โญ Recommended
Electrical Engineering eBook
Circuits, power systems, machines, control systems and switchgear.
CircuitsPower
๐Ÿ“– Read eBook
๐Ÿ“ก
โญ Recommended
Electronics Engineering eBook
Analog & digital electronics, microcontrollers, PCB design and signal processing.
AnalogPCB
๐Ÿ“– Read eBook
๐Ÿ’ป
โญ Recommended
IT Engineering eBook
Networking, cybersecurity, cloud computing, databases and enterprise IT.
NetworksCloud
๐Ÿ“– Read eBook
๐Ÿ–ฅ๏ธ
โญ Recommended
CS Engineering eBook
Data structures, algorithms, AI/ML fundamentals and system design.
DSAAI/ML
๐Ÿ“– Read eBook
By VD
Our Applications
๐Ÿงฎ
Calculator
Smart & minimal calculator
๐Ÿ”ฌ
Scientific Calc
Trig, logs, powers & more
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Unit Converter
Length, Weight, Temp & more
โฑ๏ธ
Timer & Stopwatch
Countdown & stopwatch tool
๐ŸŽจ
Color Picker
Pick HEX, RGB & HSL colors
๐ŸŽ‚
Age Calculator
Know your exact age in days
๐Ÿ’ณ
Tip Calculator
Split bills & calculate tips
โœ…
To-Do List
Plan tasks, stay productive
โš–๏ธ
BMI Calculator
Check your body mass index
๐Ÿ“ฆ
More Coming
New apps in development
Coming Soon
Legal

Privacy Policy

Last updated: May 2025

1. Information We Collect

TaskJunction does not collect any personal information. We do not require you to create an account or log in.

2. How the App Works

All tools run locally on your device. We do not store, transmit, or share any user data on our servers.

3. Permissions Used

  • Internet Access: Required to load tools and resources.
  • Storage Access: Required only where file saving is supported.

4. Third-Party Advertising

This website uses Google AdSense to display advertisements. Google may use cookies to serve ads based on your prior visits. You can opt out via Google Ad Settings.

5. Children's Privacy

Our app and website are not directed at children under 13. We do not knowingly collect data from minors.

6. Changes to This Policy

We may update this policy occasionally. Continued use of the app after changes implies acceptance.

7. Contact Us

For any privacy questions, email us at: vaibhavdhokpande@gmail.com