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Calclypso exists because financial decisions shouldn't require expensive software, confusing spreadsheets, or giving away your personal data. We build the most accurate, most useful, and most transparent free financial calculators on the internet — for both US and UK markets.
Every calculator shows its formula, methodology, data sources, and last-updated date. We never hide the math. If you want to verify our calculations against a spreadsheet, you should be able to.
All calculator logic is reviewed by credentialed financial professionals (CFP, CPA, CFA). Tax data comes directly from IRS publications and HMRC guidance. We cite our sources.
No signup walls. No email gates. No dark patterns. No selling your data. We earn revenue through tasteful, non-intrusive display ads and optional affiliate links, never by exploiting our users.
Our editorial policy, methodology documentation, and calculation formulas are publicly documented. We believe in earning trust through transparency, not opacity.
We believe in full transparency about our business model. Calclypso generates revenue through three sources:
Display advertising — non-intrusive ads placed below the calculator and within editorial content. Never above the fold.
Affiliate links — when we recommend financial products (credit cards, brokerages, lenders), some links earn us a commission if you sign up. These are always clearly disclosed.
Financial advisor matching — an optional, never-gated service that connects users with vetted advisors. Advisors pay us per referral. Users are never charged.
Our editorial content and calculator results are never influenced by our commercial relationships. A calculator will always give you the accurate answer, regardless of whether it leads to a monetizable outcome.
Calclypso provides 78+ calculators across six major financial categories: mortgage and housing, taxes, retirement and investing, debt and loans, salary and income, and budgeting and savings. We cover both the United States and United Kingdom markets, with region-specific calculators accounting for different tax systems, regulatory frameworks, and financial products. UK calculators cover all four nations (England, Scotland, Wales, Northern Ireland) where tax rules differ.