Every calculation, one network

Mortgage payments, loan repayment and how much home you can afford — plus a look at global finance.

Compare renting vs buying over time with a fair break-even, plus a build-to-rent ROI tool.

Estimate income tax across nine countries, with brackets, filing status and take-home pay.

Simple and compound interest, and how money grows over time with regular contributions.

Project investment growth, returns and the power of compounding on your portfolio.

Plan your retirement savings and see whether your nest egg will last.

Credit-card payoff, debt snowball vs avalanche, and debt-to-income tools.

Car loan payments, total cost of ownership and financing comparisons.

Convert between hourly, weekly, monthly and annual pay in seconds.

Add or remove VAT and sales tax at any rate, with a clear breakdown.

Position size, liquidation, PnL, DCA and impermanent loss — plus a plain-language crypto guide.

A proper scientific & percentage calculator that chains answers correctly — plus the story of maths.

Semester, weighted and cumulative GPA — with study methods and scholarships to apply for.

Solve equations, quadratics and expressions step by step.

Area, perimeter and volume for every common shape.

Mean, median, standard deviation and core statistics tools.

Convert length, weight, temperature, volume and more between any units.

Body Mass Index with healthy-range context and what the number really means.

Everyday health metrics like calories, BMR and body composition.

Calories, macros and training targets to support your goals.

Due date, conception and week-by-week pregnancy tracking.

Exact age, date differences and conception dates — plus life-expectancy science.

Concrete, bricks, paint, flooring and roofing quantities for any project.

Ohm's law, power, voltage drop and everyday electrical calculations.

Word counter, case converter, readability score, markdown to HTML, diff checker and more.

JSON formatter, minifier, Base64/URL encode, meta-tag, robots.txt & sitemap generators, QR, UUID.

Compress, resize & convert images, HEX/RGB, favicon, colour palette and aspect-ratio tools.

Handy everyday utilities and quick helpers for common tasks.

Simple bookkeeping for small businesses — track income, expenses and cash flow with ease.