About ToolDunya Finance

ToolDunya Finance is the money corner of ToolDunya, a family of free tool sites. It started with a simple irritation: most calculator sites bury the answer under sign-up forms, pop-ups and pages that take half a minute to load on a slow connection.

So these pages are built the opposite way. Each one is a few kilobytes, opens instantly, and does its maths on your own device — nothing you type leaves your browser. The formulas are the standard ones used across the finance industry, and every calculator shows its working: the formula, a worked example, and the questions people usually ask next.

The calculators cover the US first (mortgages, 401(k)s, federal tax) with the big Indian staples alongside (EMI, SIP, fixed deposits), because money maths matters everywhere and a rupee compounds exactly like a dollar.

One honest limit: these are estimators for learning and planning. They are not financial advice, and for a real loan, tax return or retirement decision, the documents from your lender, employer or the IRS are what count.