Statistics & MathTool
Bell Curve Generator & Normal Distribution Plotter
Plot normal curves, shade any area, compare distributions and export a high-resolution graph for reports and slides.
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Normal distribution · μ = 0, σ = 1
Rangeμ ± 1σ
Area0.6827
Outside0.3173
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The calculators engineers and students open most, each with plots and step-by-step working.
Statistics & MathTool
Z-Score Calculator: Percentile & Normal Distribution
Convert raw scores to z-scores and percentiles with a shaded bell curve and step-by-step working.
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Statistics & MathTool
Inverse Normal Distribution Calculator
Find the x value for any probability: left tail, right tail, central or two-tailed areas.
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StructuralTool
Moment of Inertia Calculator for All Shapes
Area and mass moment of inertia, centroid and section properties for common and built-up shapes.
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StructuralTool
Bending Stress Calculator
Beam bending stress from moment, section modulus and geometry, with the stress distribution plotted.
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Construction & MaterialsTool
Concrete Volume Calculator
Volume of concrete for slabs, columns, beams and footings with wastage allowance.
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Theory explained from first principles, with worked examples you can check.
Image ProcessingGuideNew
Laplacian Filter Explained: From Second Derivatives to LoG, Zero Crossings and Sharpening
The Laplacian filter finds edges, spots and fine detail by measuring the curvature of brightness. This guide starts from the derivative of a 1-D signal, derives the familiar 3 × 3 kernels from Taylor series, explains what the sign and the zero crossings mean, shows why the filter amplifies noise and how the Laplacian of Gaussian fixes it, and ends with blob detection, sharpening and the Laplacian in physics. Four live demos let you test each idea.
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Image ProcessingGuideNew
Gaussian Filter Explained: From Convolution Basics to Kernels, Sigma and the Frequency Domain
The Gaussian filter is the most widely used smoothing filter in image processing, remote sensing and computer vision. This guide builds it from nothing: what filtering is, how convolution works, where the bell curve comes from, how to compute a kernel by hand, why the filter is separable, what it does to frequencies and noise, and how to choose σ. Every idea comes with a worked example or a live demo
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ElectromagnetismGuideNew
Maxwell's Equations Explained: All Four Laws, Integral and Differential Forms
Four equations describe every classical electric and magnetic phenomenon, from a compass needle to Wi-Fi to sunlight. This guide states each law in integral and differential form, explains what it means physically with an example,
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ElectromagnetismGuideNew
Faraday's Law and Lenz's Law: Electromagnetic Induction Explained with Interactive Calculators
Every power station, transformer, electric guitar pickup and wireless charger works because a changing magnetic flux induces a voltage. This guide explains magnetic flux, Faraday's law, the direction rule of Lenz's law, motional EMF, the AC generator, transformers, inductance and eddy currents, with worked examples and an animated generator you can control.
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Hydrology & WaterGuideNew
Infiltration Equations: Horton, Philip, Green-Ampt, Ponding Time and the φ-Index
Infiltration decides how much rain becomes runoff. This guide explains the three classic infiltration models, gives the Rawls Green-Ampt parameters for all 11 soil textures, shows how to compute ponding time, and works through the φ-index and W-index.
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Hydrology & WaterGuideNew
FAO-56 Penman-Monteith Reference Evapotranspiration (ET₀): Step-by-Step Calculation with Worked Example
The FAO-56 Penman-Monteith equation is the international standard for reference evapotranspiration. This guide explains every term, walks through all twelve calculation steps, reproduces the official FAO worked example (ET₀ = 3.9 mm/day),
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Image ProcessingToolNew
Gaussian Filter Explained: From Convolution Basics to Kernels, Sigma and the Frequency Domain
The Gaussian filter is the most widely used smoothing filter in image processing, remote sensing and computer vision. This guide builds it from nothing: what filtering is, how convolution works, where the bell curve comes from, how to compute a kernel by hand, why the filter is separable, what it does to frequencies and noise, and how to choose σ. Every idea comes with a worked example or a live demo
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Image ProcessingToolNew
Laplacian Filter Tool: Edge Detection, Laplacian of Gaussian and Image Sharpening
Apply the 4-neighbour, 8-neighbour or isotropic Laplacian kernel, the Laplacian of Gaussian or a Difference of Gaussians to a test image or your own photo. View the signed response, find edges as zero crossings, sharpen the image, and see why smoothing must come before the second derivative. Click any pixel to see the arithmetic.
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Image ProcessingToolNew
Gaussian Filter Calculator: Kernel Generator and Online Image Blur Tool
Generate a normalized Gaussian kernel for any sigma, see exactly how its weights are computed, and apply it to a test image or your own photo. Add noise, measure the improvement in PSNR, find the best sigma, and compare the filter's frequency response with a box filter. Every calculation runs in your browser.
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ElectromagnetismToolNew
Magnetic Field Calculator: Straight Wire, Current Loop, Solenoid, Helmholtz Coil and Toroid
Compute the magnetic flux density B produced by steady currents in the six most common conductor shapes, using the Biot–Savart law and Ampère's law. The calculator gives B in tesla, millitesla, microtesla and gauss, plots the field along the axis, maps the exact off-axis field of a loop, compares finite and ideal solenoids, and shows the substituted formula for every result.
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ElectromagnetismToolNew
Electric Field Calculator and Simulator for Point Charges (Coulomb's Law)
Place up to eight point charges, drag them around, and watch the electric field lines and equipotential lines update live. Move the probe to read the electric field vector and potential at any point, see the net Coulomb force on every charge, or use the quick Coulomb's law calculator for two charges in any medium.
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Hydrology & WaterToolNew
SPI Calculator: Standardized Precipitation Index from Monthly Rainfall
Paste a monthly rainfall series and get the SPI at 1 to 24 months using the standard McKee et al. (1993) gamma method, the drought category of every month, a list of drought events with duration and severity, and a multi-scale heatmap that shows how short dry spells grow into long droughts.
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See every intermediate value, not just the answer, so you can learn the method and check your own work.
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Engineers Views offers detailed civil engineering tutorials, practical guides on concrete mix design and soil mechanics, insights into AI/ML and Python in engineering, and useful online calculators.
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