An ETF (Exchange Traded Fund) calculator is an online financial tool that helps investors estimate the future value of their ETF investments — based on the initial investment amount or monthly SIP contribution, expected annual return (approximated by the ETF's benchmark index historical CAGR), and investment tenure. Since ETFs replicate specific indices — Nifty 50 ETF, Bank Nifty ETF, Gold ETF, or Nifty Next 50 ETF — the expected return input is typically derived from the index's long-term historical CAGR. The ETF calculator also incorporates the Total Expense Ratio (TER) of the ETF — which reduces actual returns by the expense ratio annually — helping investors understand the net returns after costs. For Indian investors comparing a Nifty 50 ETF (with TER of 0.05% to 0.15%) against an actively managed large-cap mutual fund (with TER of 1.0% to 1.5%), the ETF calculator visually demonstrates how even a small annual cost difference compounds into a meaningful return differential over 10 to 20 years. Ventura's ETF calculator helps investors plan ETF-based portfolio strategies — particularly for passive index-based investing in Nifty 50, Nifty Next 50, and Gold ETFs — by providing clear projections of corpus growth across different investment scenarios.