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Before You Watch the Whole File, Generate the 10-Second Version
A practical guide to using Video Preview Generator for evenly sampled timeline triage before committing to a full video review.
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Mulch Calculator: The Cubic-Yard Mistake That Turns One Bag Into Three
A practical guide to estimating mulch, gravel, topsoil, sand, and compost by depth, density, weight, bulk bags, small bags, allowance, and cost.
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Break-Even Calculator: The Formula Is Simple. The Honesty Is Not.
A break-even calculator does not make the decision. It makes the assumption set visible. Here is how to use one without fooling yourself.
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Kepler Orbit Solver: Why M = E − e·sin E Has No Closed Form (And How to Solve It Anyway)
Three numerical methods for Kepler's transcendental equation: Newton-Raphson, bisection, and fixed-point iteration — compared on Earth, Mercury, and a near-parabolic comet orbit.
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ASS to SRT Converter: the Format Bridge That Fansubs and Broadcasts Both Need
The format gap between ASS and SRT is wide. This single-pass, client-side converter drops styling, preserves timing, and emits clean numbered cues — for fansubs, broadcast masters, and pipelines that need to read both.
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R-Squared Will Lie to You: A Field Guide to Reading Regression Output
Five numbers matter more than R-squared — and in this order. Why held-out validation, residual plots, and prediction intervals beat the headline score every time, and a practical workflow for shipping models that survive production.
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Chasing the Golden Hour: A Calculator for the Prettiest Light of the Day
Latitude, longitude, and date are all you need to plan the warm, slanted light that turns a flat snapshot into a portfolio image. Here's how to use a golden hour calculator like a pro.
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Barbell Plate Load Calculator: Why 142.5 kg Is Harder to Load Than 145 kg
Three decisions decide whether your bar matches the target — inventory, bar type, and unit conversion. Most calculators skip at least one, and the bar quietly rounds down by half a kilo.
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Three sine curves don’t predict your day: the 23/28/33 biorhythm chart and the three decisions that decide whether it’s worth opening
The arithmetic is real, the prediction is not. Inside the 23/28/33-day chart: birth-date precision, the meaningless combined total, and why “critical day” happens ~79 times a year.
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Telescope Field of View Calculator: Why a 25mm Eyepiece Doesn’t Always Show Andromeda
True field of view, exit pupil, and Dawes limit determine what you actually see through any telescope — and the wrong eyepiece math can hide Andromeda in plain sight.