Free UK tools
Ohkayy Tools
Free UK financial calculators. Private by design.
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 scheduleOwdra — debt payoff calculator
Plan your debt-free date with snowball, avalanche, and 8 other payoff strategies. Includes zakat and Islamic-finance amortisation. Encrypted, browser-only.
10 strategiesIn development
Coming soon
More calculators are in development. All will be free, private, and accurate.