GST Calculator India – CalcFin

India's most complete offline business calculator — GST, EMI, Profit, Cashbook, and Investments in one free app.

✅ UPDATED FOR GST 2.0 — New 5%, 18% & 40% slabs (September 2025 reform)

🧾 GST CALCULATOR

Calculate GST instantly for any amount — include or exclude tax with a single tap.


New GST 2.0 slabs: 5% (essentials), 18% (standard), 40% (luxury & sin goods)
CGST + SGST split for intra-state, or IGST for inter-state — your choice
Shop Mode: add multiple items and see the running GST total
Save, share, or export your GST calculation as a PDF on WhatsApp
Custom GST rates — add any rate not in the default list
100% offline — works in your shop or on the road, no internet needed



🏦 EMI & LOAN CALCULATOR

Plan any loan before you sign.


Calculate monthly EMI for home loans, car loans, personal loans, and business loans
Reverse calculate: find the loan amount you can afford from an EMI you are comfortable with
Full amortization schedule — see exactly how much goes to interest vs principal each month
Save and compare multiple loan scenarios



📈 INVESTMENT PLANNER

Make your savings work harder.


SIP Calculator — see how your monthly mutual fund investment grows over time
FD Calculator — fixed deposit maturity with quarterly/annual compounding
RD Calculator — recurring deposit with monthly interest
PPF Calculator — long-term tax-saving investment returns
Simple & Compound Interest — quick calculations for any scenario



💰 PROFIT MARGIN CALCULATOR

Never underprice again.


Enter cost price and selling price — get margin %, markup %, and net profit instantly
Works for retail, wholesale, and e-commerce pricing
Great for shopkeepers, traders, and small business owners



📒 DIGITAL CASHBOOK

Replace your paper register — private, secure, and always with you.


Track daily income and expenses by account
See your balance at a glance
Export transactions to CSV for your CA or accountant
No cloud, no login — your data never leaves your phone



💵 NOTE COUNTER

Count cash at the end of the day in seconds.


Enter notes by denomination (₹500, ₹200, ₹100…)
See total instantly in Indian numbering (Lakhs, Crores)
Save the count directly to your Cashbook



📐 UNIT CONVERTER

Essential for traders, shopkeepers, and logistics.


Length, Area, Weight, Volume, Temperature
Common Indian units (bigha, tola, yard, maund) included



🇮🇳 MADE FOR INDIA


Indian Rupee (₹) formatting throughout
Indian numbering system — results in Lakhs and Crores
Works offline — no internet needed, ever
No ads for premium users — upgrade once, use forever
Privacy first — zero data sent to any server



WHO USES CALCFIN?

✔ Shopkeepers & Kirana stores — daily GST and cash counting
✔ Wholesalers & Traders — profit margin and bulk GST calculations
✔ CAs & Accountants — quick client calculations on the go
✔ Business owners — EMI planning and cashbook management
✔ Students — GST, interest, and financial calculator for exams
✔ Anyone filing GST returns who needs fast, accurate tax math


Download free. Works offline. No signup required.

GST calculator | EMI calculator | profit margin | cashbook | SIP calculator | FD calculator | India finance app | GST 2.0 | CGST SGST IGST | vyapar | business calculator India


Change Log Notes (for "What's New" section)

v1.1.9 – Updated for GST 2.0 (September 2025 reform). New 5%, 18% & 40% slabs added. EMI loan type selector improved. Stability fixes.