General & Miscellaneous Calculators
Welcome to our general utility hub, gathering versatile mathematical, lifestyle, developer, and entertainment calculators in one convenient location. Here you will find specialized utilities that do not fit into single large categories, including algebraic expression simplifiers, speed and velocity solvers, Unix epoch timestamp converters, and JSON data formatters.
Every tool in this collection upholds our platform commitment: 100% browser-based computation, zero data transmission, accessible high-contrast design, and complete transparency of underlying logic and formulas. These multi-disciplinary tools solve everyday numerical queries, technical format challenges, and algorithmic conversions with immediate feedback and zero friction.
Whether you need a quick JSON-to-Excel conversion, wish to format messy code structures, convert units of velocity, calculate practical percentages, or inspect epoch timestamps, these multi-purpose utilities offer clean, uncluttered interfaces that solve everyday technical and everyday problems quickly, reliably, and accurately. Bookmark this page for fast access to your essential daily problem solvers. Try our suite of handy tools today.
love calculator
Entertainment only. Deterministic result from two names (normalised hash -> 40-99%), same input always same output; result message tiers. Prominent 'for fun' note; no data stored.
simplify calculator
(S3-lite) Simplify fractions, radicals and algebraic expressions with steps. Use math.js simplify, lazy-loaded ONLY on this page. Verify intent (algebra) via SERP.
epoch converter
Unix timestamp <-> human date; auto-detect seconds/ms; UTC and local; live current epoch; copy buttons; ISO 8601 output.
flames game
Classic FLAMES: strike common letters, count remaining n, cyclic elimination over F,L,A,M,E,S -> Friends/Love/Affection/Marriage/Enemies/Siblings. Show elimination steps.
speed calculator
Solve speed/distance/time (any two); unit selectors km/h, m/s, mph, knots; pace conversion.
json to excel
Paste/upload JSON array -> table preview -> download .xlsx/.csv. SheetJS (xlsx) lazy-loaded on click only; flatten nested keys with dot notation. All client-side.
json formatter
Format (indent 2/4/tab), minify, validate; error with line/column; tree view collapse; sort keys option; copy/download.
tone generator
Web Audio API oscillator: frequency 20-20000 Hz slider+input, waveforms, volume, start/stop, presets (A440, sweep). Safety notice about volume. One AudioContext, created on user click.
combination calculator
nCr, nPr, with/without repetition; BigInt for large n; show factorial expansion steps.
infix to postfix converter
Shunting-yard: infix -> postfix (and prefix optional) with step table (token, stack, output). Operators + - * / ^ and parentheses.
standard deviation calculator
Paste numbers. out: count, mean, variance and std dev (sample and population), sum, min/max, step-by-step table.
friendship calculator by name
Deterministic fun % from two names, different algorithm from love calculator (avoid duplicate content); tiers + shareable text.
volumetric weight calculator
vol weight = L*W*H (cm) / divisor (5000 default; 4000/6000 presets from data/couriers.json). in: dims, qty, actual weight. out: volumetric, chargeable = max.
shelf life calculator
in: manufacture or purchase date, shelf life (days/months/years). out: expiry date, days remaining, status colour.