# VoltFlow.net

> Free NEC-compliant electrical calculators for electricians, engineers, and homeowners: wire sizing, voltage drop, conduit fill, breaker sizing, solar, EV charging, and electricity costs. Formulas reference NEC 2023, IEEE 141, and EIA rate data. Operated by Munir Afridi (founder). Contact: muha-mun@hotmail.com.

## Core calculators

- [Wire Size Calculator](https://www.voltflow.net/wire-size-calculator): AWG sizing per NEC 310.16 ampacity + voltage drop
- [Voltage Drop Calculator](https://www.voltflow.net/voltage-drop-calculator): circular-mil method for any run length
- [Breaker Size Calculator](https://www.voltflow.net/breaker-size-calculator): with 125% continuous load rule
- [Conduit Fill Calculator](https://www.voltflow.net/conduit-fill-calculator): NEC Chapter 9 fill tables
- [Electricity Cost Calculator](https://www.voltflow.net/electricity-cost-calculator): by appliance, state, and country with EIA rates
- [Solar Panel Calculator](https://www.voltflow.net/solar-panel-calculator): system sizing by location
- [EV Charging Cost Calculator](https://www.voltflow.net/ev-charging-cost-calculator): per-car costs at home vs public charging
- [Ohms Law Calculator](https://www.voltflow.net/ohms-law-calculator)

## Conversions

- [Watts to Amps](https://www.voltflow.net/watts-to-amps), [kW to Amps](https://www.voltflow.net/kw-to-amps), [HP to Amps](https://www.voltflow.net/hp-to-amps)

## Reference guides

- [Kabelquerschnitt Tabelle (DIN VDE 0298-4)](https://www.voltflow.net/blog/kabelquerschnitt-tabelle): German wire cross-section to ampacity table, mm2 to amps for copper and aluminium, all installation methods A1 to E, with fuse sizing and correction factors
- [NEC Wire Size Chart](https://www.voltflow.net/blog/nec-wire-size-chart-2026): AWG ampacity per NEC Table 310.16

## About

- [About](https://www.voltflow.net/about): author credentials and review process
- [Methodology](https://www.voltflow.net/methodology): formulas and data sources
- [Contact](https://www.voltflow.net/contact)