Calculators
A little less guesswork. A better-running home.
18 useful tools. One less thing to guess.
Air Fryer
Convert oven temperature and cooking time into an air fryer starting range, with an early checking reminder.
Open calculator CookingMicrowave Wattage
Adjust a recipe time for your microwave output wattage and see the time difference and power ratio.
Open calculator CookingMicrowave Time
Quickly convert cooking times between 700, 800, 900, 1,000, 1,100 and 1,200 watt microwaves.
Open calculator Air & ComfortAir Purifier CADR
Find the clean air delivery rate your room needs for a chosen number of air changes per hour, in m³/h and CFM.
Open calculator Air & ComfortPurifier Room Size
Convert an air purifier CADR into room area and volume at your chosen ceiling height and ACH target.
Open calculator Air & ComfortAir Changes / ACH
Calculate equivalent clean-air changes per hour from room dimensions and purifier CADR.
Open calculator Air & ComfortAir Conditioner
Estimate room air-conditioner cooling capacity in BTU/h and kW using room dimensions, sunlight, occupancy and insulation.
Open calculator Air & ComfortSpace Heater
Estimate a room heating wattage range and electricity use from area, ceiling height, insulation and temperature rise.
Open calculator EnergyElectricity Cost
Calculate appliance electricity use and hourly, daily, monthly and annual running costs from watts and your tariff.
Open calculator CookingElectric Kettle
Estimate kettle heating time, thermal energy, electricity use and cost from water volume, temperature and power.
Open calculator WaterWater Heating Time
Calculate the time and energy to heat a volume of water using heater power and an estimated efficiency.
Open calculator WaterWater Heater Size
Estimate a starting storage tank size range from household demand, showers, dishwasher use and laundry.
Open calculator EnergyRefrigerator
Estimate fridge daily, monthly and annual electricity costs using annual label kWh or rated watts and duty cycle.
Open calculator EnergyDryer
Estimate electric dryer cost per load and weekly, monthly and annual electricity spending.
Open calculator EnergyDishwasher
Calculate dishwasher electricity and water cost per cycle and estimate monthly and annual spending.
Open calculator CookingOven
Estimate electric oven energy and running cost using power, cooking duration and typical usage.
Open calculator Air & ComfortDehumidifier
Estimate portable dehumidifier moisture-removal capacity from room area and dampness, in liters and US pints per day.
Open calculator EnergyWasher
Estimate washing machine electricity and water cost per load, month and year using your cycle consumption.
Open calculator