Useful calculations for everyday India
Calculator Sathi offers free tools for students, families, workers, shopkeepers and small businesses. Our calculators cover money, business, health, travel, dates and everyday maths, with Indian rupee formatting where it helps.
How to use our estimates
Each tool is intended to make common calculations easier to understand. Financial returns, tax estimates and health results depend on real-world rules and personal circumstances. Review the assumptions shown with each calculator and confirm important decisions with a qualified professional.