Free UK tools
Ohkayy Tools
Free UK financial calculators. Private by design.
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Available now
Live calculators
These calculators are live and ready to use — no sign-up required.
UK Salary & Tax Calculator
Calculate your take-home pay after income tax, National Insurance, student loans, and pension contributions. Covers England, Scotland, and Wales with 2025/26 and 2026/27 rates.
13 modesStamp Duty Calculator
Calculate SDLT, LBTT, and LTT for England, Scotland, and Wales. Supports first-time buyers, additional properties, and non-UK residents.
3 regionsMortgage Repayment Calculator
Calculate monthly repayments, total interest, and amortisation schedule. Model overpayments, stress test at higher rates, and check affordability.
Full scheduleIn development
Coming soon
More calculators are in development. All will be free, private, and accurate.