Calculator: Unit & Currency

A scientific calculator with a unit converter and a currency converter.

Do everyday arithmetic and scientific calculations, convert units, check currency exchange rates, estimate a loan payment or bank deposit, compare dates and ages, calculate BMI, and convert number bases. Calculations stay on your phone. Internet is needed only to refresh currency rates.

1. Scientific calculator
• Add, subtract, multiply, divide, percent, parentheses, powers, roots, and factorials.
• Trigonometric functions and inverses, in degrees or radians.
• Logarithms, hyperbolic functions, and more scientific calculations.
• See the result while you type. Equals saves history you can search, pin, favorite, edit, copy, and share.
• Results can be shown as fractions. Continue from Ans, with memory slots.
• A home screen widget opens the scientific calculator.

2. Unit converter
• Length, area, volume, mass, and temperature.
• Digital storage, pressure, heat, speed, time, angle, power, and frequency.
• Search units, swap direction, save favorites, and reopen recent conversions.
• The unit converter works offline.

3. Currency converter
• 100+ currencies, including USD, EUR, CNY, JPY, GBP, and HKD.
• Daily currency exchange rates from the Currency, with the rate date shown.
• Enter 1 in the source currency and see the other currencies.
• Currency code, name, and flag.
• Refreshing the currency converter needs a network connection.

4. Loan calculator
• Equal installments or equal principal payments.
• Monthly payment, interest, and a repayment schedule for a mortgage, car loan, or similar loan.

5. Deposit and return
• Interest and maturity amount from principal, annual rate, and term.
• Compound monthly, quarterly, semiannually, or annually, or use simple interest paid at the end.
• A pie chart compares principal and interest, and a line shows how the balance grows.
• Return on investment from contribution, gain, and term.
• VAT from an amount and a tax rate.

6. Date calculator
• Days, weeks, and years, months, and days between two dates.
• Add or subtract a period from a date.
• Age and total days from a birthday.

7. BMI calculator
• Body mass index from height and weight, with a category.
• Metric or imperial units.
• Recent BMI results stay on the device.

8. Base converter
• Binary, octal, decimal, and hexadecimal together.
• AND, OR, XOR, NOT, shifts, and rotates.
• Width of 8, 16, 32, or 64 bits, signed or unsigned.

9. Function graph
• Plot f(x), and optionally a second curve g(x).
• Pinch to zoom, pan, and inspect crossings, roots, and the tangent.

You can also use a dark theme, a pure black theme, system dynamic color, and optional key vibration. App shortcuts open the scientific calculator, unit converter, currency converter, dates, finance, graph, and base converter. A Quick Settings tile is available.

Results and exchange rates are estimates, not financial, medical, or professional advice. Currency rates follow the Currency and can differ from a bank counter. BMI is not a medical diagnosis.

Recent changes:
• Introducing Multi-Calculator — a simple, fast scientific calculator with everyday tools
• Unit converter, currency rates, loan & deposit, date, BMI, and base conversion
• Plot functions, keep calculation history, and stay ready with home screen widgets
• Optional dark theme, key vibration, app shortcuts, and a Quick Settings tile