Elysia Tools
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Calculators, numerics, date logic, statistics, and finance tools
Image, audio, and video processing, conversion, and optimization tools
Color, layout, graphics, visual styling, and design helper tools
Writing, cleanup, formatting, extraction, and text analysis tools
Format, file, archive, unit, and encoding conversion tools
Developer utilities, networking, web debugging, and automation helpers
Math & Numbers
Convert numbers and text between any radix from 2 to 36, with custom alphabets and presets for Base58, Base62, and Crockford Base32.
Exponential decay for radioactive isotopes and drugs: remaining amount, derived half-life, time to target, or steady-state accumulation. Uses N(t) = N0·e^(-λt).
Look up the molar mass (atomic weight) of several elements at once by symbol, atomic number, or name, as a sortable comparison table.
Compute buoyant force, fluid density, or displaced volume from any two, with optional float/sink analysis
Convert between ratios and decibels (10·log power, 20·log amplitude), and across absolute units dBm/dBW/dBV/dBu/dBFS/SIL
Compute observed frequency and frequency shift for a moving source and/or observer
Convert between frequency and wavelength with selectable medium; results in all common frequency and length units
Practice significant-figure rules with step-by-step feedback: count sig figs, round to N sig figs, convert to scientific notation, and propagate through +/−/×/÷.
Solve wavelength, frequency, or wave speed from v=f·λ, with derived period, angular frequency, wave number, and photon energy
Compute distance, time, or final velocity for free fall from rest, given any one plus gravity
Compute linear momentum, mass, or velocity from the other two, with kinetic energy and km/h conversion
Compute torque, force, or lever arm from τ = r·F·sin(θ), with the perpendicular force component shown