Working numbers,
worked properly.

Most online calculators are a thin form wrapped in advertising, computing one number and stopping exactly where the real question begins. A tip calculator that cannot split a bill unevenly. A mortgage page that quotes a monthly payment and ignores every closing cost. A solar estimator that sizes an array and says nothing about the battery bank, the wire gauge or the charge controller.

Toolbench is built on the opposite premise: finish the calculation. Each suite takes one domain and works it through to the number a person actually needs to act on.

Money, business and property

MoneyBench covers personal finance — compound growth, loan payoff, savings targets. CostKit handles everyday money questions: tips, uneven bill splits, discounts, unit-price comparison and the true lifetime cost of a loan. BizBench is the widest suite at 14 tools, covering the pricing, margin, payroll and invoicing arithmetic a small business runs on. SellerKit answers what a marketplace sale actually puts in your pocket after fees, shipping and returns. PropBench works real estate numbers fully: amortisation, rental yield, closing costs, affordability. ShipBench covers import and export — landed cost, duties, Incoterms responsibilities and container loading. calcfin will add income tax, worked line by line.

Building and the trades

BuildPlan tells you how much to buy before you leave for the merchant. BuildCalc turns a described job into a metric materials list — concrete, blocks, screed, paint. SiteBench is take-off and pricing for contractors, carrying quantities through waste, labour and margin into a quote that adds up. TradeKit spans five trades in twelve tools: electrician wire sizing and voltage drop against NEC ampacity tables, plumbing pipe sizing and flow, painter and tiler quantities with realistic pattern waste factors, and carpenter board feet.

Vehicles and energy

CarCost answers what a car really costs once depreciation, fuel, insurance, servicing and finance are counted — usually a very different figure from the sticker. SunWatt and WattBench both handle solar from opposite ends: SunWatt sizes a system from household consumption, WattBench runs the full off-grid check through array, battery bank, wire and controller. Cars is planned for the everyday decisions either side of ownership.

Files, photos and code

ConvertKit converts between images, PDF, CSV, Excel, JSON and SVG using libraries running in the page itself — which is why it can promise no uploads and no account. PixKit is six genuine photo tools built on canvas: upscaling, passport crops to real per-country specifications, restoration and product shots. DevKit is twelve developer utilities — JSON, Base64, MD5 and SHA hashing, regex, UUIDs, cron, diff, Markdown, colour, JWT decoding, timestamps, and a token estimator for AI prompts. QuickConvert and WebQuick are queued to cover unit conversion and everyday web utilities.

Health, time and everyday life

MedKit implements twelve published clinical formulas for learning, with a clear line drawn at diagnosis. TimeKit handles time zones, world clocks, business days, countdowns and Unix timestamps. PathKit is the most ambitious: pick a goal — start a channel, renovate a bathroom, plan a wedding — and get a staged, checkable plan with researched cost ranges. ChordBench does music theory with correct enharmonic spelling, which most free tools quietly get wrong. MathQuick and VitalCalc are next on the bench.

The rules every suite follows

No backend, so nothing to upload and nothing to bill you for. Every formula traceable to a published standard, table or citable source. Ranges where reality has ranges, and exact figures only where the arithmetic is genuinely exact. Honest limits stated on the page — where a tool cannot do something, it says so rather than approximating and hoping.