Ccalcus.app
UK figures · HMRC · National Insurance · GOV.UK

Financial calculators you can trust the number on.

21 UK calculators kept up to date with current rules. Take-home pay, mortgage repayments, compound interest, VAT and more. Verifiable, step-by-step breakdowns — no sign-up.

Calculators
21 live
Calculations run
874
Last reviewed
29 Jun
Rating
4.8 / 5
Most popular

Featured calculators.

The most-searched tools in the UK. Every one with a step-by-step breakdown and 2026 figures.

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By category

8 areas, 21 calculators.

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Why use us

A reference tool, not a blog full of affiliate links.

01

Instant results

Everything is worked out in your browser. No waiting, and your figures never leave the page.

02

2026 figures

HMRC, National Insurance and GOV.UK tables kept current with each change in the rules.

03

Private by default

Your data is never stored. No account, no tracking of the figures you enter.

04

Verifiable breakdown

Every number in the result has its own row in the table and its formula explained.

05

Mobile-first

The sticky result keeps your figure in view while you fill in the form.

06

Accessible AA

WCAG AA contrast throughout. Visible focus and touch targets of at least 44px.

Start with the calculator everyone searches for.

Take-home pay, mortgage, VAT or compound interest. Three clicks and you have the breakdown. No account, no sign-up, no ads between the fields.