SCIENCE FOR EVERYDAY LIVING
Home Appliance Calculators
Simple tools. Real science. Better decisions.
Calculate cooking times, appliance sizes, energy use and running costs using physics, engineering principles and trusted reference data.
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A little less guesswork. A better-running home.
Air Fryer
Cooking time & oven conversion
Microwave
Wattage & cooking time
Oven
Cooking conversions & energy
Electric Kettle
Boiling time & energy
Air Conditioner
BTU & cooling size
Air Purifier
CADR & room size
Dehumidifier
Size & capacity
Space Heater
Heating size & running cost
Water Heater
Heating time & capacity
Refrigerator
Energy usage & cost
Washer & Dryer
Water & energy cost
Dishwasher
Running cost
Air Fryer
From oven to air fryer, made simple.
Your recipe, adapted. Try our most popular cooking calculator.
Popular tools
Small calculations that make a real difference.
Microwave Wattage
Adjust a recipe time for your microwave output wattage and see the time difference and power ratio.
CalculatorsAir Conditioner
Estimate room air-conditioner cooling capacity in BTU/h and kW using room dimensions, sunlight, occupancy and insulation.
CalculatorsAir 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.
CalculatorsElectricity Cost
Calculate appliance electricity use and hourly, daily, monthly and annual running costs from watts and your tariff.
CalculatorsElectric Kettle
Estimate kettle heating time, thermal energy, electricity use and cost from water volume, temperature and power.
CalculatorsWater Heating Time
Calculate the time and energy to heat a volume of water using heater power and an estimated efficiency.
CalculatorsGood decisions start with clear calculations.
Based on real science
Physics, engineering principles and trusted reference data.
Trusted sources
References from government agencies and manufacturer documentation.
Clear and transparent
See the formula, assumptions and steps behind every result.
Better decisions
Choose suitable appliances and understand their running costs.