Free GST Calculator India 2025 - Upaman

Calculate GST online for free. Add, remove, or reverse GST with complete CGST, SGST, IGST breakdown for all rates (5%, 12%, 18%, 28%). Perfect for business compliance and tax planning.

Choose GST Operation

Add GST to Amount

Methodology, assumptions, and source references
Auto-updated on Feb 24, 2026Data snapshot: Sep 13, 2025

Inputs used

  • Base amount or GST-inclusive amount and selected GST rate
  • Breakdown shows CGST/SGST split for intra-state and IGST reference for inter-state

Formula basis

  • Add GST: GST = amount × rate / 100; total = amount + GST
  • Remove GST: base = inclusive × 100 / (100 + rate); GST = inclusive - base

Assumptions and limits

  • Rate is applied uniformly to the full amount entered
  • Complex classification/composition-scheme scenarios are out of scope
  • Use official filing portals and professional advice for compliance decisions

Official sources

Related guides

📋 Important Disclaimer

Information Purpose Only: This GST calculator is provided for informational and educational purposes only. The calculations are based on standard GST rates and formulas as per Indian GST laws.

Not Financial Advice: The results should not be considered as professional tax advice or official GST calculations. For actual GST filing and compliance, please consult a qualified CA or tax professional.

Accuracy Notice: While we strive for accuracy, GST rates and rules may change. Always verify current rates and regulations from official GSTN portal or government sources before making business decisions.

No Liability: We disclaim any liability for decisions made based on these calculations. Users are responsible for verifying the accuracy of inputs and results.

💡 For official GST information, visit: gstn.gov.in

About Upaman GST Calculator India 2025

Free GST Calculator Features

Our free GST calculator by Upaman provides comprehensive GST calculations for Indian businesses. Calculate GST amounts with precision using add GST, remove GST, and reverse GST functions. Perfect for GST compliance, invoice preparation, and tax planning.

  • Add GST Calculator - Calculate total amount including GST
  • Remove GST Calculator - Extract GST from inclusive amount
  • Reverse GST Calculator - Find base amount from GST-inclusive price
  • Complete CGST, SGST, IGST breakdown

GST Rates Supported

Calculate GST for all applicable rates in India 2025. Our GST calculator supports all current GST slabs as per Indian GST laws. Use this tool for accurate GST calculations in business transactions.

  • 5% GST - Essential goods and services
  • 12% GST - Standard rate items
  • 18% GST - Most goods and services
  • 28% GST - Luxury and sin goods

Why Choose Upaman GST Calculator?

Free GST Calculator by Upaman - No registration required. Fast, accurate, and reliable GST calculations for Indian businesses. Perfect for CA professionals, business owners, and students. Calculate GST online with complete transparency and detailed breakdowns. Trusted by thousands of users across India.