Free, accurate calculators for Indian tax, GST, payroll, savings and Tamil Nadu state compliance — each with a plain-English guide and the exact formula. Bookmark this page; we add new tools regularly.
GST & Indirect Tax
- GST Calculator (add / remove)
- GSTR-3B Late Fee Calculator
- GSTR-9 Late Fee Calculator
- E-Way Bill Validity Calculator
Income Tax
- Section 44AD / 44ADA Presumptive Tax
- Section 80D Deduction Calculator
- Section 234B / 234C Interest Calculator
Payroll & HR
- Gratuity Calculator
- Gratuity: Act vs Non-Act
- Leave Encashment Tax Calculator
- ESI Contribution Calculator
Investments & Savings
- PPF Calculator
- SIP Calculator
- EMI Calculator
- KVP / NSC Maturity Calculator
- Senior Citizen Savings (SCSS)
- Sukanya Samriddhi Calculator
Vehicle & General
Education
- CGPA to Percentage Converter
- GATE Score Calculator
- JEE Main Percentile to Rank
- Anna University SGPA / CGPA
- TNPSC Group 2 Marks
- TNPSC Group 4 Marks
State Compliance — Tamil Nadu
- Chennai Property Tax Calculator
- TN Professional Tax Calculator
- TN Stamp Duty & Registration
- TN Land Unit Converter
- TANGEDCO Commercial Bill
- TNEB Bill Calculator
More states and tools coming soon. Every calculator is also listed under the Calculators tag.