Useful web tools

Simple tools for quick answers

A collection of focused calculators and converters for everyday use.

Tools

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Calculate body mass index from height and weight.

Compare your height to country specific reference data.

Estimate how lifestyle choices may affect remaining life expectancy.

Compare renting vs buying with mortgage, investment, and ownership-cost assumptions.

Estimate blood alcohol concentration with the Modified Norberg pharmacokinetic model.

Time a passage, mark errors and self-corrections, then generate a classroom-ready fluency report.

Separate troublemakers, keep helpers together, lock must-have seats, and generate a classroom plan from your seating rules.

More tools coming soon.