Qalc

qalc Plugin

Powerful command-line calculator from Qalculate!. Non-interactive with --terse for clean output.

Commands

Math

• qalc calc eval '5 + 2 * 3' — Basic arithmetic
• qalc calc eval 'sin(45deg)' — Trigonometry
• qalc calc eval 'sqrt(144)' — Square root
• qalc calc eval 'log(100)' — Logarithms
• qalc calc eval '2^10' — Exponentiation
• qalc calc eval 'factorial(10)' — Factorial

Unit Conversion

• qalc convert units '100 meters to feet' — Length
• qalc convert units '1 gallon to liters' — Volume
• qalc convert units '50 celsius to fahrenheit' — Temperature
• qalc convert units '10 kg to pounds' — Mass/Weight

Currency

• qalc convert currency '100 EUR to USD' — Euro to Dollar
• qalc convert currency '50 GBP to JPY' — Pound to Yen

Equation Solving

• qalc solve equation 'x^2 - 4 = 0' — Quadratic equation
• qalc solve equation '2*x + 5 = 13' — Linear equation

Reference

• qalc list units length — List length units
• qalc list functions trig — List trig functions

Full Access

• qalc _ _ — Passthrough for any qalc command

Usage Examples

• "What's 25 * 4.5?"
• "Convert 100 meters to feet"
• "How much is 50 EUR in USD?"
• "Solve x^2 + 3x - 10 = 0"
• "List all temperature units"

Installation

brew install qalculate-tools

Key Features

• Non-interactive: qalc -t 'expression' prints result and exits
• Terse output: -t flag gives clean result only — agent-friendly
• 2000+ units: Length, mass, volume, temperature, time, and more
• Currency: Real-time exchange rates
• Equations: Solve linear, quadratic, differential equations
• Functions: Trig, log, stats, calculus, and custom functions
• Physical constants: Speed of light, Planck constant, etc.