ZMPL Tools · Free Online Calculators
GST, income tax, EMI, age, attendance, percentage — six accurate calculators built for India. Instant results, no sign-up, no ads.
Instant results
Calculates as you type — zero delay
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Nothing leaves your browser, ever
Zero friction
No account, no paywall, no install
All tools
All built for India — accurate, instant, and completely free.
Am I safe to skip?
See your live attendance percentage and find out exactly how many more classes you can miss before falling below 75% — or how many you must attend to recover.
For students at KL, SRM, VIT, LPU and all Indian colleges
Exact age to the day
Your precise age in years, months and days. Useful for Sarkari exam eligibility, SC/ST/OBC age relaxation, Agniveer age checks, and government form submissions.
Sarkari exams, SC/ST/OBC relaxation, Agniveer eligibility
Add or strip GST instantly
Add GST at any slab (5%, 12%, 18%, 28%) or reverse-calculate the pre-GST price from a GST-inclusive invoice. Covers CGST, SGST and IGST — built for Indian businesses.
Small businesses, freelancers, shopkeepers across India
Marks, CGPA & numbers
Calculate percentage of marks, convert CGPA to percentage (and back), or find any percentage of a number. Covers CBSE and standard university CGPA conversion formulas.
CBSE & university CGPA to percentage conversion
Know your cost before you borrow
Get your monthly instalment, total interest, and full amortisation schedule before you sign. Works for bike, home, car and personal loans of any amount.
Bike loan, home loan, personal loan planning
Old vs new regime, side by side
Compare old and new tax regimes for AY 2025-26 and AY 2026-27 in one view. See which saves more based on your 80C, HRA, and home loan deductions — updated for the latest Budget.
Salaried employees comparing old vs new regime
Calculate compatibility and more
Discover your love compatibility score, ideal partner traits, and relationship insights with our Love Calculator. Just enter two names to get personalized predictions and fun analysis — perfect for a lighthearted look at your romantic prospects.
Convert your GPA to percentage
Calculate your Grade Point Average (GPA) and convert it to a percentage for VIT University. Useful for academic planning and scholarship applications.
Built for India
Whether you're a student checking 75% attendance eligibility, a salaried employee comparing old vs new income tax regime for AY 2025-26, or a first-time buyer planning a bike loan EMI — these free tools give instant, accurate answers without spreadsheets or manual formulas.
GST slabs follow India's current 5%, 12%, 18%, and 28% rates. Income tax supports both FY 2024-25 (AY 2025-26) and FY 2025-26 (AY 2026-27). Percentage calculators cover CBSE and standard university CGPA conversion formulas.
Our attendance calculator shows your current percentage and tells you exactly how many more classes you can skip while staying above 75% — or how many you must attend to recover. Works for every Indian college.
Try attendance calculatorCalculate exact age from date of birth in years, months and days. Find the age difference between two people. Built for Sarkari exam eligibility checks, OBC/SC/ST age relaxation, and Agniveer applications.
Try age calculatorEnter any price and a GST slab to get the tax-inclusive or exclusive amount. Reverse GST mode extracts the pre-tax base price from any GST-inclusive invoice — handy for business owners and freelancers.
Try GST calculatorFind the percentage of marks across subjects, convert CGPA to percentage using CBSE or standard university formulas, or calculate any percentage of a number. No Excel needed.
Try percentage calculatorMonthly instalment, total interest outgo, and a month-by-month amortisation schedule. Works for bike, home, car, and personal loans — so you understand the real cost before any commitment.
Try EMI calculatorCalculate tax liability under both regimes for AY 2025-26. See which saves more based on your 80C, HRA and home loan deductions. Updated for the latest Union Budget slab rates and ₹75,000 standard deduction.
Try income tax calculatorDiscover your love compatibility score, ideal partner traits, and relationship insights with our Love Calculator. Just enter two names to get personalized predictions and fun analysis — perfect for a lighthearted look at your romantic prospects.
Try love calculatorCalculate your Grade Point Average (GPA) and convert it to a percentage for VIT University. Useful for academic planning and scholarship applications.
Try GPA calculatorFAQs
Students can use the attendance calculator to stay above 75% and the percentage calculator to convert CGPA to percentage for any Indian university. Job seekers can verify age eligibility for Sarkari exams using the age calculator.
Business owners can add or reverse-calculate GST at any slab with the GST calculator. Salaried employees can compare regimes for AY 2025-26 with the income tax calculator, and loan buyers can plan with the EMI calculator. All tools are free, instant, and require no sign-up.
Get started — it's free
No account, no loading screen, no paywall — just open and calculate.
