All in One Calculator: Units

All in One Calculator puts 47 calculators and unit converters in one clean, fast app — plus a calculator good enough to replace your stock one. Free, works offline, and available in English and हिन्दी.

🔢 CALCULATOR
- Advanced keys: √, ^, %, !, π, e and brackets
- Live preview — see the answer as you type
- Memory keys: MC, M+, M−, MR
- Three keypad layouts: Simple, Classic, Modern
- Full history — every calculation saved, revisit anytime

📏 UNIT CONVERTER — 19 categories
- Length, Weight, Area, Volume, Speed, Temperature, Time
- Data storage, Data transfer, Energy, Power, Pressure, Force
- Acceleration, Angle, Torque, Volumetric flow, Cooking, Fuel
- Convert several units at once — add or remove rows as you like
- Numeric base (binary, octal, decimal, hex), Roman numerals, shoe size, ring size

💰 FINANCE CALCULATORS
- EMI calculator / loan calculator — monthly EMI, total interest, total payable
- Simple and compound interest calculator
- Tip calculator with bill split
- Sales tax / GST style tax calculator
- Unit price calculator — spot the better deal while shopping
- Currency converter — live exchange rates with the rate date shown, and it keeps working offline using the last saved rates

📐 GEOMETRY
- Shapes: square, rectangle, triangle, right triangle, trapezoid, rhombus, pentagon, hexagon, circle, circle arc, ellipse
- Bodies: cube, prism, pyramid, pyramid frustum, cone, cone frustum, cylinder, sphere, sphere cap, sphere segment, ellipsoid
- Area, perimeter, volume, surface area, diagonals and more

🧮 MATH & ALGEBRA
- Percentage calculator — discount, increase, percent of, percent change
- Average, proportion and ratio calculator
- Equation solver — quadratic equations, complex roots included
- GCF & LCM, combinations (nCr and nPr)
- Prime number checker and random number generator

🩺 HEALTH
- BMI calculator with weight category
- Body fat calculator
- Calorie burn calculator

📅 DATE & TIME
- Age calculator — exact years, months and days
- Add or subtract days from any date
- Days, weeks and months between two dates

🚗 EVERYDAY
- Mileage calculator — km/l and l/100km

✨ WHY YOU'LL LIKE IT
- Works offline — almost every tool runs without internet
- Clean, modern Material design that stays out of your way
- AMOLED dark theme to save battery on OLED screens
- Dynamic colours on Android 12+
- English and हिन्दी — change the whole app's language from Settings
- Free to use

👥 MADE FOR
Students, teachers, engineers, shopkeepers, small business owners, builders, homemakers — anyone tired of installing five different calculator apps for five different jobs.

New calculators are added regularly. Have a request, or found something that looks wrong? Write to devcodes8@gmail.com — every message is read.

Whether you need a quick unit converter, an EMI calculator before taking a loan, a GST or discount calculator at the shop, a BMI check, an age calculator, or the area and volume of a shape for homework — it is all here, in one calculator app.