Change the numbers. The result updates. The formula sits under each tool.
Monthly amount invested at the start of each month.
FV = P × ((1+i)^n − 1) / i × (1+i). i = annual rate / 12. n = years × 12. This is an annuity due.
A = P × (1 + r/m)^(m×t) with m = 4 (quarterly).
EMI = P × i × (1+i)^n / ((1+i)^n − 1). i = annual rate / 12. n = years × 12.
Slabs: 0–4 lakh nil, 4–8 5%, 8–12 10%, 12–16 15%, 16–20 20%, 20–24 25%, above 24 lakh 30%. Standard deduction Rs 75,000. Rebate 87A if taxable income is Rs 12 lakh or less. Cess 4%.
More tools (same formulas will be wired the same way): step-up SIP, lumpsum, SWP, loan prepay, RD, PPF, SSY, NPS, EPF, ELSS, HRA, LTCG, retirement, term cover, compound interest, regular vs direct.