Super Simple Calculator

Clean, fast and genuinely useful calculators — built for the UK, with more added all the time. No clutter. No confusing forms. Just answers.

Use the UK Tax Calculator Browse all calculators

Mobile friendly £ + € where needed Simple breakdowns More coming weekly

Popular right now

UK Tax Calculator

Estimate take-home pay, income tax and NI.

UK Mortgage Calculator

Monthly payment + breakdown tables.

UK VAT Calculator

Add or remove VAT from any price.

UK to Spain Mortgage Calculator

£/€ conversions + Spanish buying tax & fees.

Tip: Bookmark this page — new tools will appear here as they’re released.

UK calculators

Start with these four. Each one is built to load quickly, work on mobile, and give a clear result without the fluff.

UK Tax Calculator

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

Best for: employees & self-employed planning →

UK Mortgage Calculator

Monthly payments + amortisation breakdown (yearly and monthly).

Best for: comparing rates, terms and deposits →

UK VAT Calculator

Add VAT to a net price or remove VAT from a gross price.

Best for: quick pricing, invoices and product margins →

UK to Spain Mortgage Calculator

Convert £/€ plus Spanish buying tax (ITP / VAT + AJD) and fees.

Best for: UK buyers budgeting for Spain →

Why Super Simple Calculator?

Most calculator sites are slow, messy and filled with distractions. This site is built the opposite way — lightweight pages, clear inputs, and results that actually help you decide.

Built for real decisions

Clear totals, sensible breakdowns, and outputs you can trust for planning.

No clutter

You won’t be fighting popups and nonsense. Just the calculator and the info.

Always expanding

The goal is an all-in-one finance calculator library — UK first, then worldwide.

FAQs

Are these calculators accurate?

They’re built for planning and comparison using standard calculation methods. Real lenders, tax rules and fees can vary, so always confirm important decisions with official sources or a professional.

Will you add calculators for other countries?

Yes — the long-term plan is calculators for multiple countries. The UK section is being built first, then expansion from there.

Can I embed these calculators on my own website?

Some calculators include an embed option. More embed-ready calculators will be added as the site grows.