Private by design
Every calculation happens on your device. No account, no tracking, no data leaves your phone.
Multi-utility calculator
Every calculation,
elegantly solved.
Twelve precision tools for money, travel, health and everyday maths, wrapped in one refined, private and completely free app.
- 12
- Calculators
- 0
- Data collected
- Free
- Forever
The collection
Twelve tools. One refined app.
From filling the tank to planning a loan, each calculator is purpose-built and effortless to read.
- 01
Fuel & EV
Petrol, diesel, CNG and electric range for your budget.
Finance - 02
Loan EMI
Monthly, daily or yearly payments with total payable.
Finance - 03
GST / VAT
Input tax, output tax, payable GST and profit or loss.
Finance - 04
Savings
Turn a goal into a daily, monthly and yearly plan.
Finance - 05
Trip Budget
Split cost per person, per day and per person per day.
Finance - 06
Discount
Final price and exact savings in a single glance.
Finance - 07
Grocery
Multi-item basket with itemised GST and grand total.
Finance - 08
Electricity Bill
Estimate your bill and average daily cost.
Finance - 09
Percentage
Marks and scores converted to a clean percentage.
Everyday - 10
Temperature
Celsius, Fahrenheit and Kelvin, instantly.
Everyday - 11
Age
Exact age in years, months, days and total days lived.
Health - 12
BMI
Body mass index with a clear weight category.
Health
Why Calculator Zip
Crafted for clarity and trust.
Precise to the paisa
Clean, tested formulas with clear inputs, so what you see is exactly what you owe or save.
Effortlessly fast
Results update as you type. Twelve tools, one calm interface, zero clutter.
The maker
Built by Siddharth Jain.
Calculator Zip began with a simple frustration: everyday maths shouldn’t need five different apps. It brings the calculations people actually make, such as fuel costs, GST, loans and budgets, into a single calm, ad-free experience.
The goal is to keep growing it into the most useful and trustworthy calculator toolkit, with simplicity, accuracy and privacy at the centre of every decision.
Get in touch
Feedback, support or collaboration?
Send a message below or write to infosiddjain@gmail.com