Crate gananayantra 

gananayantra

gananayantra is a professional-grade, multi-industry calculation engine written in Rust. It provides reusable, library-first calculators across diverse domains including:

• Finance: ROI, time value of money, compound interest, loans, taxes, retirement
• Health: BMI, BMR, body fat percentage, pregnancy, fitness
• Energy: Power consumption, electricity cost
• Geo: Earth distance (Haversine), horizon distance
• Water: Pressure at depth, river flow rate
• Space: Orbital velocity, escape velocity, orbital period
• Math: Statistics, geometry, advanced math
• Logistics: Freight weights, inventory (EOQ)
• Physics: Fluid dynamics, kinematics
• Climate: Carbon footprint
• Utilities: Percentage calculations, lifestyle tools
• Specialized: Building, electronics, networking, science

Design Principles

This crate is library-first and does not impose any CLI or I/O model. All public functions:

• Accept typed parameters
• Return Result<T, String> for safe error handling (usually Result<f64, String>)
• Perform input validation
• Are pure functions with no side effects

Quick Start

use gananayantra::finance::tvm::future_value;

let fv = future_value(10_000.0, 0.08, 5).unwrap();
assert!(fv > 14_000.0);

Modules

climate

Climate and environmental calculators.

energy

Energy-related calculators including power consumption and electricity cost.

finance

Finance-related calculators including ROI, time value of money, and compound interest.

finance_investment

geo

Geospatial calculators including Earth distance and horizon distance.

health

Health and fitness calculators including BMI, BMR, body fat percentage, and calorie requirements.

logistics

Logistics and Supply Chain calculators.

math

Mathematical and statistical calculators.

physics

Physics calculators for engineering and science.

space

Space and orbital mechanics calculators including orbital velocity, escape velocity, and orbital period.

specialized

Specialized industry calculators.

utilities

General-purpose utility calculators.

utility_lifestyle

Lifestyle and utility calculators.

water

Water-related calculators including pressure at depth and river flow rate.