Everything in the catalog

Web calculator with user-defined variables and functions, complex numbers, derivatives and integrals.

Notepad-style calculator where each line is evaluated live, with units, percentages and variables.

Web version of an arbitrary-precision calculator that understands units, currencies and conversions.

Calculator that works with ranges and uncertain numbers instead of exact values.

Collection of small calculators for everyday topics, with active calculator packs cached for offline use.

Shows how overpayments cut mortgage term and interest, charted with D3.

Computes UK capital gains from broker transaction exports and produces a PDF report for self assessment.

Pick a GPU and a model to see whether it fits in memory for inference or training.

Calculates the memory a Hugging Face Hub model needs at different precisions for inference and training.

Estimates how much GPU memory a language model needs for a given size, quantisation and context length.

Calculates income tax for employees in Bangladesh.

Visual UK take-home pay breakdown covering income tax, NI, pension relief and salary sacrifice.

Predicts training memory use for a transformer from pasted config or manual architecture values.

Prepares Polish PIT-38 tax figures for foreign stock trades from broker exports.

Calculates VRAM needs for a GGUF model, including splitting layers across GPU and CPU.

Crypto gain and loss tax calculator for trade histories.

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.