Smart Home and IoT

  • Watt-Hours to Amp-Hours Calculator
    Convert watt-hours (Wh) to amp-hours (Ah) instantly. Enter battery energy and voltage to find capacity in Ah and mAh using Ah = Wh / V.
  • Internet Speed Needed Calculator
    Calculate the internet download speed (Mbps) your household needs by adding up streaming, gaming, video calls, smart home devices plus headroom.
  • LED Payback Period Calculator
    Calculate how fast an LED bulb pays for itself. Enter wattages, usage hours and electricity rate to see annual savings and payback in years.
  • Christmas String Light Count Calculator
    Find how many Christmas string lights you need to cover a given length and the total wattage they draw. Quick holiday lighting planner.
  • LED Bulb Lifespan Calculator
    Convert an LED bulb's rated lifespan in hours into years based on daily usage. Find out how long your LED bulbs will really last.
  • Smart Thermostat Savings Calculator
    Estimate how much money a smart thermostat can save you each year on heating and cooling. Enter your annual energy cost and savings percentage.
  • LED Savings Calculator
    Calculate how much money you save each year by switching from incandescent or halogen bulbs to energy-efficient LED lighting.
  • Generator Sizing Calculator
    Size a generator by adding running watts plus the largest startup surge. Enter your appliances to find the minimum wattage and a recommended size.
  • Battery Life / Runtime Calculator
    Estimate how long a battery will last from its mAh capacity, the device's current draw in mA, and an efficiency factor. Get runtime in hours and minutes.
  • Mbps to MB/s Converter
    Convert internet speed from Mbps (megabits per second) to MB/s (megabytes per second) instantly. Just divide by 8 — see the real download rate.
  • Cost to Run a Device per Hour Calculator
    Calculate the electricity cost to run any device per hour from its wattage and your kWh rate. Also shows daily, monthly and yearly running costs.
  • Solar Battery Bank Size Calculator
    Calculate the battery bank size in amp-hours (Ah) for your solar/off-grid system from daily energy use, days of autonomy, voltage and depth of discharge.
  • TV/Projector Viewing Distance Calculator
    Find the ideal TV or projector viewing distance from screen diagonal, aspect ratio, and preferred viewing angle (SMPTE 30°, THX 40°).
  • Projector Brightness (Nits / Foot-Lamberts) Calculator
    Calculate projector screen brightness in foot-lamberts (fL) and nits from lumens, screen gain, and screen size. Free, instant home-theater tool.
  • Average Illuminance Calculator
    Calculate average illuminance (lux) from light fixtures using the lumen method: fixtures, lumens, coefficient of utilization, light loss factor and area.
  • Lux to PPFD Conversion Calculator
    Convert lux to PPFD (µmol/m²/s) using source-specific conversion factors for sunlight, LED, HPS and more. Free grow-light photosynthetic light estimator.
  • Home Battery Backup Duration Calculator
    Estimate how long your home battery backup will power your house during an outage based on capacity, usable depth of discharge, and average power load.
  • LED Strip Power Supply Calculator
    Calculate the right LED strip power supply (PSU) wattage and current. Enter watts per meter, length and voltage to size a driver with safety headroom.
  • Appliance Running Cost Calculator
    Calculate the daily, monthly and yearly running cost of any appliance from its wattage, hours of use and your electricity rate per kWh.
  • Solar Battery Home Backup Sizing Calculator
    Size a home solar battery backup. Enter daily energy use, backup days, and depth of discharge to find the battery capacity (kWh) you need.
  • Smart Home UPS / Battery Backup Runtime Calculator
    Estimate how long your UPS or home battery will power your devices. Enter capacity (Wh), load (W), inverter efficiency and depth of discharge to get runtime.
  • IP Camera Bandwidth Calculator
    Calculate total network bandwidth (Mbps) and storage for IP/CCTV camera systems from bitrate per camera and number of cameras. Free online tool.
  • Smart Home Device Power Consumption Calculator
    Estimate the yearly cost, energy and CO2 of standby (vampire) power from smart home devices. Enter standby watts and your electricity rate.
  • Ceiling Fan Size Calculator
    Find the right ceiling fan blade span for your room. Enter length and width to get a recommended fan size in inches based on room area.

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