Toolbench/SmartHomeKit
All 49 suites

Money & Business

Building & Trades

Vehicles & Energy

Files, Photo & Code

Life & Everyday

Travel & Lifestyle

More

Languages

🇨🇳🇮🇳
100% browser-based · no account · instant answers

Smart home math,
without the guesswork

Six free calculators for planning a smart home: what your device shopping list actually costs, how many Wi-Fi mesh nodes you need for full coverage, how much a smart thermostat saves on energy, how much internet bandwidth your connected devices need at once, how long a smart lock's batteries will last, and whether the whole setup pays for itself.

Device cost estimatorMesh Wi-Fi coverageEnergy savingsFree forever
Smart Home Device Cost EstimatorEnter the quantity and unit price of smart plugs, bulbs, a thermostat, locks, security cameras and a hub, plus any monthly subscription fees, to see your total upfront hardware cost and first-year cost of ownership.Wi-Fi Mesh Coverage PlannerEnter your total floor area, number of floors and construction type to see the recommended number of mesh Wi-Fi nodes needed for full, reliable coverage.Smart Thermostat Energy Savings CalculatorEnter your current annual heating and cooling energy cost, an expected savings percentage from smart scheduling and setback, and the thermostat purchase and install cost to see your annual savings and payback period.Home Network Bandwidth CalculatorEnter how many devices you run for 4K streaming, video calls, camera uploads, general IoT traffic and gaming, plus a safety margin, to see the total internet bandwidth your home network needs.Smart Lock Battery Life EstimatorEnter your smart lock's rated battery life in unlock cycles, your household's estimated daily unlock/lock cycles and a connectivity overhead allowance to see estimated battery life in months.Home Automation ROI CalculatorEnter your total smart home investment plus monthly savings from energy efficiency, an insurance discount and the value of time saved to see your simple payback period and return on investment over time.

No calculators match that search.

Plan a smart home that actually works

Start with the device cost estimator to see what your shopping list really costs, then use the Wi-Fi mesh coverage planner so every device stays connected. The smart thermostat energy savings calculator and home automation ROI calculator show whether the investment pays for itself, while the bandwidth calculator and smart lock battery life estimator keep the day-to-day details covered.

More tools

Smart Home Device Cost EstimatorEnter the quantity and unit price of smart plugs, bulbs, a thermostat, locks, security cameras and a hub, plus any monthly subscription fees, to see your total upfront hardware cost and first-year cost of ownership.Wi-Fi Mesh Coverage PlannerEnter your total floor area, number of floors and construction type to see the recommended number of mesh Wi-Fi nodes needed for full, reliable coverage.Smart Thermostat Energy Savings CalculatorEnter your current annual heating and cooling energy cost, an expected savings percentage from smart scheduling and setback, and the thermostat purchase and install cost to see your annual savings and payback period.Home Network Bandwidth CalculatorEnter how many devices you run for 4K streaming, video calls, camera uploads, general IoT traffic and gaming, plus a safety margin, to see the total internet bandwidth your home network needs.Smart Lock Battery Life EstimatorEnter your smart lock's rated battery life in unlock cycles, your household's estimated daily unlock/lock cycles and a connectivity overhead allowance to see estimated battery life in months.Home Automation ROI CalculatorEnter your total smart home investment plus monthly savings from energy efficiency, an insurance discount and the value of time saved to see your simple payback period and return on investment over time.

Frequently asked questions

Is SmartHomeKit really free, with no account needed?

Yes — every calculator runs entirely in your browser with no sign-up, no data collection and no cost. Nothing you type is sent to a server.

Who is SmartHomeKit built for?

Anyone planning, budgeting for or fine-tuning a smart home — from someone buying their first few smart plugs to a household adding mesh Wi-Fi, security cameras, a smart thermostat and a smart lock all at once.

Are the default costs and percentages accurate for every product or region?

They're realistic, generic mid-range estimates based on how smart home devices and services are typically priced and how they typically perform — but actual prices, coverage and savings vary by brand, model, region and household. Always replace a default with your own real numbers where you have them.

Can these tools replace a professional installer or electrician?

No — they're planning and estimation tools, not professional advice. For anything involving your home's electrical wiring, breakers or panel capacity, use a licensed electrician; these calculators are about consumer smart-home devices, networking and costs, not house electrical design.