Artifacts

Checks whether your bag meets carry-on luggage size rules for airlines.

Estimates taxes owed by Romanian PFA sole traders (Romanian language).

Calculates UK capital gains and dividend tax on investments, including corporate actions.

Enter input, cached and output token counts to see cost per model from a price table.

Polish B2B net income calculator comparing ryczalt, flat-tax and tax-scale options (Polish).

Computes Ghana take-home pay, income tax and SSNIT contribution from gross income.

Estimates how long a circuit runs on a chosen battery type from its capacity and the load.

Shows how savings grow over time given a starting amount, regular deposits and an assumed yearly return, with yearly totals.

Estimates the token cost of an image for OpenAI vision models from its width, height and detail level.

Animated support-desk model using Erlang C that shows waits exploding near full utilisation and how much an extra agent helps.

A basic calculator built as an installable offline-capable web app with React and Redux.

Czech income tax calculator for individuals (Czech language).

Web calculator for estimating and comparing LLM API costs across models.

Simulates Warhammer 40,000 attack dice and shows hit, wound and save probabilities as charts.

Works out which trades rebalance a portfolio while limiting taxes.

All-in-one site with 21 calculators and tools, including math, finance, graphing, conversion, password and QR.

Computes timer prescaler and compare values for AVR timer interrupts on Arduino.

Backtests an asset allocation, showing returns, volatility and drawdowns.

Relates signal rise time to bandwidth and the trace length at which it acts like a transmission line.

Estimates how long a battery will last for a given load current.

Estimates distance to a Bluetooth device from RSSI and path loss exponent.

German gross-to-net salary calculator (German language) for 2026 taxes and social contributions.

Counts Monday to Friday working days between two dates, with your own holidays excluded.

Finds reactions, shear, moment and deflection for a cantilever beam.