About CalcPro

CalcPro is a free collection of online calculators for finance, math, health and everyday tasks. Most calculator sites give you a number and nothing else. We do the opposite: every tool shows the formula it uses and a worked example with real numbers, so you can check the result instead of trusting it blindly.

What makes us different

• An India-first finance suite. EMI, income tax (old vs new regime), PPF, NPS, EPF, gratuity, SIP, GST, stamp duty and more — built around current Indian rules and rupee amounts, not retrofitted from a US tool.
• Speed and clarity. Pages load fast, work on mobile, and recalculate live as you type.
• Transparency. We cite the formula and show the math. Where rules change yearly (like tax slabs), we date our assumptions.

We are constantly adding calculators. If there is one you need, we would love to hear about it — see the contact page.