Best Wattage Calculation Tool Apps

0+ iOS apps curated and reviewed

4.4 avg rating
19 free apps
Updated June 2026

Looking for free wattage calculation tool apps? 19 of our 0+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Top Picks for Wattage Calculation Tool

FPL#1

FPL by NextEra Energy, Inc

Editor's Choice
🔧 Utilities
4.5😐(23K ratings)
Free
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Manage your electricity account securely with biometric login. Report outages, track restoration, and receive bill notifications. Monitor energy usage and view projected costs.

What We Love

  • 👍 Easy to use and navigate
  • 🚀 Efficient app performance
  • 💡 Useful features like usage tracking and billing
  • 🔒 Secure login and account management

Room to Improve

  • 🐛 Occasional bugs and crashes
  • ⏱️ Slow app response times
  • 🔒 Overly restrictive security measures for some users
Electrician Handy Tool#2

Electrician Handy Tool by Handy Tool LLC

All in one electricians tools
Strong Contender
📊 Productivity
4.1(21 ratings)
FreeIn-App Purchases
Electrician Handy Tool screenshot 1
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This app provides electricians with essential tools for conduit bending, calculations, and quick reference. It simplifies electrical work with features like voltage drop calculation and a user-friendly fraction calculator.

Emporia Energy#3

Emporia Energy by Emporia Corp

Vue/EVChargers/Plugs/Batteries
Worth Considering
🌟 Lifestyle
4.8😐(11K ratings)
FreeAds
Emporia Energy screenshot 1
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This app offers detailed analysis of your home's energy consumption, providing insights and recommendations to help you save money, conserve energy, and reduce your carbon footprint. Track your usage in real-time and over time with various comparison options.

What We Love

  • 🚀 Comprehensive and easy home power monitoring
  • 👍 Great customer service
  • 👍 Excellent and intuitive
  • 👍 Visibility into electrical usage

Room to Improve

  • 🐛 Messed up time axis
  • 🐛 Smart plug feature issues
  • 🐛 Graphs are a step back

More Wattage Calculation Tool apps to explore

4
Generac PWRview
Generac PWRview
Generac PWRview
Monitor your Generac system!
Free

Monitor your home's energy production and consumption in real-time. Track solar generation, battery capacity, and daily energy usage to understand your system's performance and potential savings.

Live energy monitoringReal-time power consumption trackingSolar production and battery capacity monitoring
🔧 Utilities
(1.8K)
free
5
Duct Calculator - DuctCalc
Duct Calculator - DuctCalc
Duct Calculator - DuctCalc
HVAC Sizing & Psychrometric
Free

This app provides professional HVAC duct sizing and psychrometric calculations in a single tool. It offers detailed calculations for various duct types and materials, along with comprehensive humid air property analysis. Designed for HVAC professionals, it replaces traditional ductulators with accurate digital functionality.

Duct sizing for round, rectangular, and flexible ductsFittings pressure drop calculationPsychrometric analysis with interactive chart
🔧 Utilities
(7)
free with in-app purchases
6
Watts Amps Volts  Calculator
Watts Amps Volts  Calculator
Watts Amps Volts Calculator
Electrical power calculator
Free

This app serves as an advanced electrical power calculator. It allows users to easily compute and convert between Watts, Amps, and Volts for single-phase systems, and kW, Amps, Volts, and Power Factor for three-phase systems. Simply input known values to find the missing one.

Single-phase power calculationsThree-phase power calculationsConvert Watts, Amps, Volts
🔧 Utilities
(46)
ad-supported
7
Discount Power
Discount Power
Discount Power
The Discount Power Texas App
Free

Manage your electricity account with ease. Access billing, payment history, and usage data. Set up AutoPay, Average Billing, and Paperless Billing. View plan details and compare usage trends.

Account managementBilling and payment historyUsage data visualization
🔧 Utilities
(802)
free
8
EnerTalk - Energy Monitor
EnerTalk - Energy Monitor
EnerTalk - Energy Monitor
by Encored Technologies, Inc.
Free

Monitor your home's real-time electricity usage and spending directly from your smartphone. Visualize daily and monthly patterns, estimate your bills, and receive personalized saving tips. Supports multiple properties without requiring new hardware.

Real-time energy usage monitoringDaily and monthly usage patternsMonthly bill estimation
🔧 Utilities
(220)
free with in-app purchases
9
Calculator of Air
Calculator of Air
Calculator of Air
Psychrometric Charts Tool
Free

This tool calculates humidity-related air properties with a calculator-like interface. It supports six key parameters and provides accurate results even under extreme conditions. Ideal for HVAC, cleanrooms, and industrial drying.

Calculate six humidity parametersAccurate results under extreme conditionsSupports Celsius and Fahrenheit
📊 Productivity
(14)
ad-supported
10
Measure Master Pro Calculator
Measure Master Pro Calculator
Measure Master Pro Calculator
Design + Building Math Calc
Free

This app provides comprehensive U.S. and metric unit conversions and advanced calculations for design and building projects. It offers solutions for geometry, weight, and dimensional analysis, with a user-friendly interface and built-in help.

Multi-dimensional unit conversion (U.S. & metric)Advanced weight calculationsGeometry solutions (circle area, circumference)
🔧 Utilities
(4K)
free with in-app purchases
11
ElectriCalc Pro
ElectriCalc Pro
ElectriCalc Pro
Electrician NEC Calculator
Free
$29.99 | 100% OFF

This app provides electricians and electrical professionals with a powerful tool for performing complex calculations based on the latest National Electrical Code (NEC). It offers solutions for wire sizing, voltage drop, conduit sizing, and motor calculations, saving time and ensuring code compliance.

NEC compliant calculationsWire and conduit sizingVoltage drop calculations
🔧 Utilities
(256)
free with in-app purchases
12
Voltage Drop Calculator.
Voltage Drop Calculator.
Voltage Drop Calculator.
Wire Size, NEC & IEC Tools
Free

Calculate voltage drop and wire size using both NEC and IEC standards. Supports various load types, conductor materials, and system configurations. Generates detailed reports for electricians, engineers, and contractors.

NEC and IEC dual standardsVoltage drop and wire sizing calculationsSupport for continuous load and corrections
🔧 Utilities
(411)
free with in-app purchases
13
Dakota - The Electrician App
Dakota - The Electrician App
Dakota - The Electrician App
Load, Conduit & NEC Calculator
Free

This app provides electricians and apprentices with essential tools for on-the-job tracking and NEC-aligned calculations. It helps with circuit analysis, load calculations, conduit fill, motor and transformer computations, and voltage drop assessments for field use and exam preparation.

On-the-job hour tracking by areaNEC-aligned circuit calculationsBranch, feeder, and service load calculations
📚 Education
(5)
free
14
Super Calculator - useful tool
Super Calculator - useful tool
Super Calculator - useful tool
units currency converter app
Free

This app offers advanced scientific calculations, real-time currency exchange rates, and comprehensive unit conversions. Customize your experience with various themes and decimal place settings for precise results.

Scientific calculationsReal-time exchange ratesExtensive unit conversion
🔧 Utilities
(2)
subscription
15
Electrical Calculator
Electrical Calculator
Electrical Calculator
Electrical Tools & Formulas
$3.99

This app provides over 65 essential electrical calculation tools and formulas for engineers, students, and professionals. It supports both USCS and SI units and includes features like resistor color code conversion and upgraded voltage drop calculations aligned with industry standards.

Over 65 electrical calculation toolsResistor color code calculatorsUpgraded voltage drop calculations
🔧 Utilities
(462)
free
16
Ratio Calculator Total Tool
Ratio Calculator Total Tool
Ratio Calculator Total Tool
Back Calculation from Total
Free

This application calculates ratios and totals from input values and also performs back calculations. It can be used to solve problems like determining heating time based on microwave oven output wattage.

🔧 Utilities
(7)
17
Microwave Wattage Converter
Microwave Wattage Converter
Microwave Wattage Converter
Solve the difference in watt!
Free
🔧 Utilities
(0)
18
Electrical Formulator
Electrical Formulator
Electrical Formulator
by Historycentral.com Inc
Free

This app provides a comprehensive suite of electrical calculation tools for design and engineering challenges. It offers hundreds of conversion and calculation options, with features to save, print, and email results. Easily access frequently used and recently accessed formulas, with all calculations automatically stored.

Over 100 electrical formulasSave and organize resultsShare results via email or print
📊 Productivity
(1)
freemium
19
Grundfos Energy Check Tool
Grundfos Energy Check Tool
Grundfos Energy Check Tool
by Grundfos Holding A/S
Free

This tool helps assess the energy-saving potential of installed pumps by collecting data like flow, head, and power. It supports life cycle cost analysis to inform decisions about pump replacement or new solutions, providing factual documentation.

Pump data collection (Q, H, P2)Pump age and operating hours inputLife cycle cost (LCC) analysis support
🔧 Utilities
(1)
free
20
Wattage Conversion
Wattage Conversion
Wattage Conversion
Microwave Oven Wattage Convert
Free
🔧 Utilities
(0)