UK calculators
Accurate, interactive calculators built for the United Kingdom — pounds, UK rules and statutory figures like the 5.6-week holiday entitlement and the 10% overpayment allowance. Every tool shows its formula and cites its sources. More are added regularly.
Finance & mortgage
- Mortgage overpayment calculator
Interest saved and years knocked off your term from regular and one-off overpayments, with a 10% allowance check and a balance chart.
- Buy-to-let mortgage calculator
Maximum borrowing from the ICR stress test, interest-only vs repayment, gross and net rental yield, the 5% stamp duty surcharge and cash-on-cash ROI — all in one.
Salary & tax
- Pro rata calculator
Full-time salary to pro-rata pay by hours or days — annual, monthly, weekly, hourly and daily — plus pro-rata holiday and term-time support.
- Annual leave calculator
UK statutory holiday entitlement (5.6 weeks, 28-day cap) in days and hours, pro-rata for part-time and part-year, plus the 12.07% irregular-hours method.
- Dividend tax calculator
Your UK dividend tax for 2026/27 band by band, the £500 allowance, your effective rate, and how much extra the April 2026 rate rise costs vs 2025/26.
Math & numbers
Coming soon.
Health & fitness
Coming soon.
Home & trade
Coming soon.
Date & time
Coming soon.