All calculators

Every tool is free, needs no account and computes entirely in your browser.

Travel

Visa windows, border rules and trip compliance.

Schengen Visa 90/180 Day Calculator

Add your past and planned trips to see exactly how many of your 90 days remain inside the rolling 180-day window — and the earliest date you can legally re-enter.

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Finance

Compounding, retirement targets and inflation-adjusted returns.

Finance

FIRE & Compound Interest Calculator

Model monthly investing with compound growth, salary increases and inflation, then see the age at which your portfolio can safely cover your annual spending.

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Health

Energy expenditure, body composition and nutrition targets.

Health

TDEE & Macro Nutrition Calculator

Work out your basal metabolic rate, total daily energy expenditure and a protein-first macro split for your goal — in metric or imperial units.

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