Work back from your expenses to the required UK pre/post-tax income and the portfolio needed to cover them
Convert between Annual Percentage Rate and Annual Percentage Yield
Compare borrowing against assets vs. selling them
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Calculate growth of investments with compound interest
UK dividend tax on drawing from an invested pot: tax by band, marginal rate cliffs, and pot longevity
Plan your path to Financial Independence, Retire Early
Position sizing for stocks, options, futures and crypto — optimal bet size, fractional Kelly, drawdown odds and order quantities
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Measure real-world distances in photos using a reference line
Calculate electricity running costs from device power specs
Expected value, Bayes' theorem, and Kelly criterion calculators
Calculate UK mortgage affordability, repayments, overpayments, and borrowing capacity
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Calculate calorie deficit and project your weight timeline