Data Sources & Methodology
At NepaCalc, accuracy and transparency are our highest priorities. This document outlines the official sources, updating frequency, and mathematical methodologies that power our specialized calculators.
Official Data Sources
Our financial, taxation, and utility calculators rely on data published by authoritative bodies in Nepal. We regularly verify our constants and algorithms against official circulars from:
- Inland Revenue Department (IRD)Income tax slabs, TDS rates, and tax exemptions.
- Nepal Rastra Bank (NRB)Foreign exchange rates, policy rates, and banking regulations.
- Nepal Electricity Authority (NEA)Domestic and commercial electricity tariff structures.
- Nepal Stock Exchange (NEPSE)Capital gains tax rates and broker commission structures.
- FENEGOSIDADaily gold and silver benchmark prices.
Update Frequency
| Data Type | Update Schedule | Source Mechanism |
|---|---|---|
| Gold & Silver Rates | Daily (11:00 AM NPT) | Official FENEGOSIDA releases |
| Exchange Rates | Daily | NRB Reference Rates |
| Income Tax Slabs | Annually | Federal Budget (Jestha 15) |
| NEA Tariffs | As announced | ERC / NEA Tariff notices |
Mathematical Methodology
Our engineering, scientific, and health calculators utilize standard, peer-reviewed mathematical formulas.
- Financial Mathematics: Standard Time Value of Money (TVM) algorithms are used for SIP and EMI calculations, adhering to compounding standards utilized by Nepalese commercial banks.
- Scientific Precision: Our JavaScript evaluation engine utilizes IEEE 754 double-precision floating-point arithmetic. High-precision libraries are leveraged for large matrix operations and complex calculus.
- Health Calculations: Tools like BMI and Calorie calculators follow guidelines established by the World Health Organization (WHO) and the US Centers for Disease Control and Prevention (CDC).
Disclaimer
While we strive for 100% accuracy, NepaCalc is an informational platform. Calculated results should be used for reference and planning purposes only. We recommend consulting with certified financial planners, tax consultants, or relevant professionals before making significant financial or engineering decisions. For more details, please read our full disclaimer.