CalcWise UK is a free online resource providing practical finance calculators built specifically for people living and working in the United Kingdom.
We provide ten free calculators covering the most common personal and business finance calculations UK users need: mortgage repayment, income tax and NIC estimates, VAT addition and removal, salary breakdowns, loan costs, investment projections, freelance rate setting, business profit and margin, ROI measurement and insurance premium estimates.
Every tool is designed to give a useful planning figure in seconds, without sign-up, without storing any data, and without requiring any technical or financial knowledge to operate.
We analysed the top-ranked UK finance calculator websites and identified common gaps: missing National Insurance in take-home pay estimates, no LTV ratio on mortgage tools, loan calculators that only showed one scenario, and freelance rate tools that ignored non-billable time. CalcWise UK was built to fill those gaps.
We prioritise mobile users, plain-English explanations, and complete transparency about what our tools do and do not calculate. Every calculator page includes a full in-depth guide and detailed FAQ to help users understand their results.
All calculations run entirely in your browser. No financial data is transmitted to any server. We do not store, sell or share the numbers you enter. Our analytics (if any) track only anonymous page-level metrics.
All results produced by CalcWise UK tools are estimates for planning and educational purposes only. They do not constitute financial, tax, investment or legal advice. For important financial decisions, always consult a qualified professional — a mortgage broker, accountant, financial adviser or solicitor as appropriate.