Health
Follow the 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds to reduce eye strain
eye-care-20-20-20Text Processing
Encode and decode with less-common text codecs: Base65536 (binary → dense Unicode) and netstring (self-delimiting framing). Base85 is intentionally not rebuilt (already covered).
extended-text-base-codecsMath & Numbers
Bézout coefficients for any-sign integers with the full division-step table, lcm, and optional linear Diophantine solving (particular + general solution).
extended-euclidean-algorithmHealth
Compute N_t = N₀·e^(rt) with fold change, doublings, doubling time, or half-life.
exponential-growth-populationMath & Numbers
Mean-stress fatigue correction under cyclic loading. Given stress amplitude σ_a, mean stress σ_m, and material σ_uts / σ_-1 (endurance limit) / σ_y, compute safety factors from three classical criteria: Modified Goodman (linear, conservative), Gerber (parabolic, better for ductile metals), and Soderberg (uses σ_y, most conservative). Reports the governing (smallest) value and whether the operating point lies inside the Goodman line.
fatigue-limit-calculatorMath & Numbers
Calculate the kinetic energy stored in a flywheel. E = ½·I·ω², ω = 2π·n/60. Enter the moment of inertia directly, or compute it from flywheel mass and radius (I = ½·m·r²). Supports J/kJ/Wh.
flywheel-energy-storageHealth
See week-by-week fetal development from conception to birth (40 weeks). Enter your LMP date or a known gestational age and the tool highlights the current week with size, weight and milestones.
fetal-development-timelineUtilities
Compute how to mix base fertilizers to hit a target N-P-K analysis like 10-10-10. Outputs per-fertilizer kg plus a parts ratio for any batch size.
fertilizer-blend-calculatorDesign
Paste a Figma / Tokens Studio variables JSON and export to Tailwind, shadcn CSS variables, Style Dictionary, or SCSS. Preserves color, spacing and font tokens with type inference.
figma-tokens-exportDesign
Calculate camera field of view from focal length and sensor size, with scene coverage at distance.
field-of-view-calculatorText Processing
Convert text into every decorative Unicode style at once and compare them side-by-side — small caps, bold, italic, script, fraktur, double-struck, monospace, circled, fullwidth, strikethrough, underline, upside-down.
fancy-text-generatorMath & Numbers
Convert Fahrenheit to Kelvin with configurable decimal precision
fahrenheit-to-kelvin