Calculator

Calculator is a modern 3D calculator for everyday arithmetic, engineering and scientific calculations, and unit conversions.

Four modes and key features:
- Standard: addition, subtraction, multiplication, division, percentages, sign change, and repeated calculations with the equals button.
- Engineering: square root, powers, reciprocal values, trigonometric functions, logarithms, and constants π and e.
- Scientific: inverse and hyperbolic trigonometry, factorial, and other extended functions.
- Converter: 23 tools for currency, area, length, temperature, volume, mass, data storage, speed, time, dates, BMI, discounts, age, numeral systems, tax/GST, split bills, frequency, fuel consumption, angle, pressure, force, power, and loans.
- Calculation history is stored locally, with a configurable entry limit.
- Copy and paste numeric values.
- System, light, and dark themes, plus selection of the startup mode.
- Responsive 3D interface for phones and tablets.

All calculator functions and non-currency conversions work offline. Currency conversion sends the entered amount and selected currency codes to the InetTools service to load the current result and rate date. No account is required.

Recent changes:
Added a fourth Converter mode with 23 unit, currency and everyday calculation tools.