OneCalc: All-in-One Calculator

Anjneya Tech

About this app

OneCalc is an all-in-one calculator with 43 practical tools for everyday math, money, unit conversion, dates, health estimates, fuel costs and technical calculations.

Designed to keep everyday calculations in one place, OneCalc works offline and does not require an account.

### MATH

• Basic calculator with memory, brackets, percentages and calculation history
• Scientific calculator with trigonometry, logarithms, powers, roots, constants and DEG/RAD modes
• Percentage calculator for percentages, increases, decreases, profit and loss

### LOANS & MONEY

• EMI calculator with amortization schedule and principal-vs-interest breakdown
• Loan prepayment calculator for estimating changes to interest and loan tenure
• SIP calculator with step-up SIP and goal-based options
• FD calculator with cumulative, periodic payout and simple interest modes
• GST calculator with add/remove GST and CGST, SGST and IGST breakdowns
• Discount calculator with optional GST calculation

These tools provide calculations and estimates based on the values you enter. They do not provide loans, investment products or financial services.

### UNIT & CURRENCY CONVERTER

Convert units across 14 categories:

Length, Weight, Area, Volume, Temperature, Speed, Time, Data, Pressure, Energy, Power, Fuel Economy, Angle and Frequency.

Currency converter supports INR, USD, EUR, GBP, AED, CAD, AUD, SGD, JPY and CHF.

Currency conversion can work offline using exchange rates saved on your device. Updating rates requires an internet connection and is optional. Offline rates are labelled with their applicable date.

### DATES & TIME

• Age calculator with lifetime totals and next birthday
• Date calculator for date differences, adding or subtracting days, working days, holidays and countdowns
• Time and timesheet calculator for shifts and decimal hours

### HEALTH & FITNESS

• BMI calculator
• BMR and TDEE estimates
• Ideal weight calculator
• Body fat estimates

Health and fitness results are general estimates based on the information you provide. They are for informational and wellness purposes only and are not medical advice. OneCalc is not a medical device and does not diagnose, treat, cure or prevent any medical condition.

### EVERYDAY CALCULATORS

• Fuel cost and mileage calculator
• Petrol vs electric cost comparison
• Tip calculator
• Bill splitter with even or item-by-item splitting

### DEVELOPER & TECHNICAL TOOLS

• Programmer calculator with binary, octal, hexadecimal and bitwise operations
• Hex, RGB and HSL colour conversion
• ASCII and Unicode conversion
• Unix epoch timestamp conversion

### PRIVACY

OneCalc is designed to keep calculations on your device.

• No account or login required
• No cloud sync
• No advertising
• No analytics or tracking
• No in-app purchases
• Calculation history is stored locally on your device
• Optional biometric app lock
• Local backup and restore

### OFFLINE USE

The calculators and tools are designed to work without an internet connection. Internet access is only needed for optional currency-rate updates.

### USEFUL FEATURES

• Plain-language calculator search
• Indian number formatting, including ₹20,00,000
• Save calculation scenarios
• Copy, share and export results as PDF or CSV
• Calculation history with pinning
• Favourites and reorderable home shortcuts
• Local backup and restore
• Dark and light themes
• Large-text support
• Screen-reader labels for accessibility

**43 TOOLS IN ONE APP**

Use OneCalc for everyday calculations such as EMI, GST, SIP, FD, percentages, unit conversion, dates, fuel costs, bill splitting, scientific math and programmer calculations.

Financial calculations are estimates based on the information and assumptions entered by the user and are not guaranteed results or financial advice. Health and fitness calculations are general wellness estimates and are not medical advice.

What’s new

First OneCalc build for internal testing — not for public release.

43 calculators in one app: basic and scientific, EMI with amortization schedule, loan prepayment, SIP, FD, GST, unit and currency conversion, date and age maths, health estimates, fuel, tip and bill split, plus programmer tools.

Everything runs offline. No account, no ads, no tracking; all data stays on your device.

Please report anything wrong with a calculation result.