UK Calculators

Fast, clean UK calculators with simple inputs and clear results. More calculators (and more countries) are coming — but right now this section focuses on the UK.

Start with the UK Tax Calculator See all UK calculators

Mobile friendly Clear totals Breakdowns where useful More added regularly

What you’ll find here

Tax – income tax + National Insurance estimates
Mortgage – repayments and amortisation breakdown
VAT – add or remove VAT from any price
UK → Spain – £/€ conversions + Spanish buying costs

Tip: Use the hub as your bookmark — new UK tools will appear here first.

All UK calculators

Select a calculator below. Each tool is built to be quick, readable and easy to use on mobile.

UK Tax Calculator

Estimate take-home pay, income tax and National Insurance.

Quick take-home estimate →

UK Mortgage Calculator

Monthly repayments, total interest and breakdown tables.

Compare rates & terms →

UK VAT Calculator

Add VAT to net prices or remove VAT from gross prices.

20%, 5% + custom rates →

UK to Spain Mortgage Calculator

£/€ conversions + Spanish buying tax & fees + breakdowns.

Budget for Spain properly →

UK calculators FAQ

Are these calculators free?

Yes — all calculators on Super Simple Calculator are free to use.

Do you cover other countries?

Not yet on this page. The plan is to add calculators for other countries over time. For now, this hub focuses on the UK tools listed above.

Can I use these calculators for financial decisions?

They’re designed for planning and comparison. Exact tax and lender figures can vary, so always double-check with official sources or a qualified professional for important decisions.