India tools and calculators
India issues identifiers and tax numbers such as Aadhaar, PAN and GSTIN through national bodies, each with its own published format and check rules. These tools validate those formats and apply the published formulas.
This hub lists the 12 tools on TNAADO Tools that are specific to India. The largest groups are International Trade, Postal & Payments Tools (5), Canadian Tools (3) and Calculators (2). Every page is free, runs in your browser and names the rule or register it uses, so you can check the source before relying on the number.
International Trade, Postal & Payments Tools · 5 tools
India 87A Rebate and Marginal Relief Calculator
See how the new-regime 87A rebate (up to Rs 60,000) and marginal relief work just above Rs 12 lakh. Enter taxable income for tax before and after.
India · Income tax Enter your taxable income under the new regime. The tool shows slab tax, the rebate, and the marginal relief that stops a small excess over ₹12 lakh from costing more than the excess itself. Up to ₹12,00,000 taxable income the rebate (max…
India GSTIN Validator – Format & Checksum Check | TNAADO
Validate an Indian GSTIN: state code, PAN pattern, entity number, the letter Z and the check character. Free, runs in your browser.
India · GST identifier check Paste a 15-character GST identification number to test its structure and check character, and see exactly which part fails. Structure and check characterNot a registration lookupRuns in your browser
India HRA Exemption Calculator (Section 10(13A))
HRA exemption calculator for India: enter basic salary, HRA received and rent paid to get exempt and taxable HRA under the least-of-three rule.
India · Income tax The exempt part of House Rent Allowance is the lowest of three amounts. Enter your figures to see which one binds and how much HRA is taxable. Exempt HRA = the least of (1) HRA actually received, (2) rent paid minus 10% of salary, and (3)…
India Income Tax Calculator 2026 (New Regime)
India income tax calculator for the new regime (AY 2026-27 slabs): tax after the Rs 75,000 standard deduction, 87A rebate, surcharge and 4% cess.
India · Income tax Enter your annual income to see tax under the default new regime: slabs, standard deduction, section 87A rebate, surcharge and 4% health and education cess. Under the new regime a salaried resident individual pays no tax up to ₹12,75,000 of…
India Old vs New Tax Regime Calculator 2026
Compare India's old and new income tax regimes side by side for AY 2026-27. Enter income, age and old-regime deductions to see which tax is lower.
India · Income tax Enter your income and the total of the exemptions and deductions you would claim under the old regime. The tool taxes you under both and shows the lower one. The new regime has lower slabs and a ₹75,000 standard deduction but almost no…
Canadian Tools · 3 tools
India Aadhaar Number Validator
Free India Aadhaar number validator. Checks the 12-digit format and the real Verhoeff check digit, not a guessed formula. Runs in your browser…
International · Validation Check a 12-digit Aadhaar number against the Verhoeff check digit its last digit carries, plus the rule that issued numbers start with 2 to 9. Everything runs in your browser. How it works: the first 11 digits are run through…
PAN Card Number Validator and Format Check
Free PAN card number validator. Checks the AAAAA9999A format and decodes the 4th-letter holder type and 5th-letter name rule. Format only; runs in…
International · Validation Check the structure of an Indian Permanent Account Number (PAN) and see what its 4th and 5th characters say. Everything runs in your browser. This checks format only; it cannot tell you whether a PAN was issued. How it works: a PAN…
Voter ID (EPIC) Number Format Checker
Free EPIC number format checker for the Indian voter ID card. Tests the common 3 letters + 7 digits pattern in your browser. Format only.
International · Validation Test whether an Indian voter ID (EPIC) number fits the common pattern of three letters followed by seven digits. Format only, in your browser. To confirm that a card is real, use the Election Commission portal. How it works: most…
Calculators · 2 tools
Amazon India Fees Calculator: Referral and Closing
Amazon India fees calculator: referral fee by category and price slab, closing and weight handling fees, 18% GST on fees and profit per unit.
Amazon.in seller fees Enter the selling price and category. The tool applies the referral fee for your price slab, adds the closing and weight handling fees you copy from Amazon's rate cards, and shows profit per unit after 18% GST on the fees.
Gratuity Calculator India: Payment of Gratuity Act Formula
Estimate gratuity under the Payment of Gratuity Act: last drawn basic plus DA x 15/26 x completed years, with the six-month rounding rule and an…
India · payroll · Payment of Gratuity Act Enter your last drawn basic pay plus dearness allowance and your length of service to estimate gratuity under section 4(2) of the Payment of Gratuity Act, 1972. Covered employeesCeiling is editableEstimate only
Food & Kitchen Math Tools · 2 tools
Baking Pan Size Converter and Substitution Calculator
Swap one baking pan for another: compare volume and area of square, rectangle, round and loaf pans and get the factor to scale your recipe.
Food & baking · Cakes and bakes Out of the pan the recipe calls for? Pick the pan it calls for and the pan you have, and see how the batter volume compares. InchesSquare, rectangle, round, loafVolume and area
Pan Size Recipe Scaler: Adjust Ingredients for a New Pan
Paste a recipe and change the pan: scale every ingredient by baking area, for example a 9x13 pan to two 9-inch rounds, with egg fractions in…
Food & baking · Scaling Recipe written for a 9x13 but you only have round pans? Enter both pans, paste the ingredient list and get the new amounts. Square, rectangle, roundSeveral pans at onceEgg fractions
Why these tools are listed under India
A tool is placed under India when its address or title names the place, as with Amazon India Fees Calculator and Baking Pan Size Converter and Substitution Calculator, or when it sits in a section built for that country. The same tag is written into each page's structured data as the place it covers, so search engines and assistants can tell which rules a result was built for. Generic tools such as unit converters carry no jurisdiction and are not listed. Rates and thresholds change, so check the dated source on each tool before filing, paying or signing anything.