Watt Calculator
Calculate watts, volts, amps, ohms, power factor, kW, energy consumption, and cost with Ohm's Law and Watt's Law.
Interactive App Interface & Screenshots
Browse high-resolution vertical smartphone preview of Watt Calculator. You can easily customize photos or view live screens below.
Key Features & Calculation Capabilities
A complete electrical power calculation toolkit engineered for electricians, engineers, contractors, and students who need fast, accurate Watt's Law and Ohm's Law results with energy and cost projections.
Watts, Volts, Amps & Ohms
Solve for power (W), voltage (V), current (A), or resistance (Ω) from any two known values. The core relations are P = V × I, V = I × R, P = I² × R, and P = V² ÷ R. Supports DC and single-phase AC with power factor for true power.
Power Factor & kW Conversion
Calculate true power, apparent power (VA), and reactive power (VAR) with power factor input. Convert between watts, kilowatts, and kVA for AC circuits. Power factor correction saves energy costs and reduces demand charges.
Energy Consumption & Cost Calculator
Estimate daily, monthly, and annual energy use with kWh = (Watts × Hours) ÷ 1,000, then multiply by the local tariff for cost. Model appliance-level scenarios and compare efficiency upgrades with payback periods.
Unit Conversion & Formula Reference
Convert between watts, kilowatts, horsepower, BTU/h, and tons of refrigeration. Access a built-in reference of electrical formulas including Ohm's Law, Watt's Law, and three-phase power equations.
PDF Reports & CSV Export
Generate professional PDF calculation sheets showing input values, formulas used, and results. Export to CSV for project files or client proposals. All calculations run on-device and work fully offline.
Metric & Imperial Support
Work with volts, amps, watts, ohms, kilowatts, horsepower, and BTU/h. Switch between metric and imperial units instantly. All calculations, conversions, and cost estimates update automatically. Fully functional offline.
Technical Specifications
| Application Name | Watt Calculator |
|---|---|
| Developer | KOCHI DIGITAL |
| Platforms | Android (Google Play) — iOS (App Store) |
| Version | v2.9.0 |
| Size | 14.3 MB (APK) |
| Category | Utilities / Electrical / Engineering |
| Languages | English, French, Spanish, Arabic, Chinese |