insect is an open source high precision scientific calculator that supports physical units.
insect offers a web version that needs no installation, as well as a command line version.
- Supports an interactive style with its readline-based interface. There is a saved history that can be browsed by pressing up- and down keys. The history is also searchable via a keyboard shortcut.
- Strict syntax.
- Shows 6 significant digits in the result of the calculation. However, the internal numerical precision is significantly higher (30 digits).
- Evaluate mathematical expressions:
- Operators: addition, subtraction, multiplication, division, square, modulo, unit conversion, exponentiation, and assignment.
- Mathematical functions: abs, acos, acosh, asin, asinh, atan, atan2, atanh, ceil, cos, cosh, exp, floor, fromCelsius, fromFahrenheit, gamma, ln, log, log10, maximum, minimum, mean, round, sin, sinh, sqrt, tan, tanh, toCelsius, and toFahrenheit.
- High-precision numeric type with 30 significant digits that can handle very large (or small) exponents like 10^(10^10).
- Exponential notation e.g. 6.022e23.
- Physical units including metric and binary prefixes. All units that are accepted by SI as well as most units of the imperial and US customary systems (and many more).
- Explicit unit conversions. All SI-accepted units support metric prefixes. In addition, binary prefixes (KiB, MiB, GiB, …) are also supported.
- Variable assignments such as the mass of the earth, and the oscillation period of a pendulum. Predefined constants include the speed of light, Planck’s constant, electron mass, elementary charge, magnetic constant, and many more.
- User-defined functions with multiple arguments.
- Sums and products.
- Unicode support.
- Tab completion.
- Syntax highlighting.
- SI-compliant pretty printing.
- Opensearch integration.
- Arbitrary precision input.
- Developer provides binaries for Linux (32 and 64 bit), Mac, and Windows (32 bit and 64 bit) operating systems.
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