Indian accounting work tends to require the same handful of computations repeated across clients and periods — block-wise depreciation under Section 32, componentised depreciation under Schedule II, the eleven ratios mandated by Schedule III Notes to Accounts, contribution and margin-of-safety workings for budgeting and CVP analysis, and the working capital gap with MPBF for bank-finance assessment.

These calculators replace the spreadsheet you would normally rebuild from scratch each time. Every input maps cleanly to a balance-sheet or profit-and-loss line item, every formula is the one your auditor would expect, and every output prints as a presentable workpaper with figures, formulas and source ratios shown side by side. Where the computation depends on a regulatory reference (IT-Act WDV rates, Companies-Act useful lives, Schedule III ratio definitions, Tandon Committee margin norms), the underlying basis is shown on the page itself so the working paper does not need a separate footnote.