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 Nepal-specific financial, taxation, market, and utility calculators rely on data published by authoritative organizations in Nepal.
For international and general-purpose calculators, NepaCalc uses recognized mathematical, scientific, engineering, financial, health, and measurement standards, together with appropriate authoritative references. 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 / when official rates are released | 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 calculators use established mathematical, scientific, financial, engineering, health, statistical, and measurement methodologies appropriate to each tool. Where applicable, formulas are based on recognized standards, authoritative guidance, or established mathematical relationships.
- 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
We strive to provide accurate and reliable information, but 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.