Home Economics calculators
30 calculators Electricity Cost Calculator Find the exact running cost of any appliance. Pick a preset or enter watts, set usage, duty cycle, and rate to get daily, monthly, and annual electricity costs.
Open Unit Price Calculator Compare up to 3 products by price per unit, gram, ml, oz or any measure. Finds the best value, savings %, total spend and works across mixed units.
Open Appliance Depreciation Calculator Calculate the actual cash value (ACV) of any home appliance after depreciation. Choose straight-line or declining-balance, with a year-by-year schedule.
Open Appliance Wattage Calculator Calculate any appliance electricity cost instantly. Enter wattage, daily hours, and your kWh rate to see daily, monthly, and annual energy costs with a full breakdown.
Open Back to School Calculator Free back-to-school budget calculator. Enter K-12 or college spending by category to see your total, budget gap, daily savings needed, and a full breakdown.
Open Balloon Arch Calculator: How Many Balloons for an Arch Calculate exactly how many balloons you need for a balloon arch or garland. Enter height, width, balloon size, and arch style to get a count and cost estimate.
Open Bathroom Mirror Size Calculator: Vanity Mirror Width and Height Find the right bathroom mirror size for any vanity. Get width, height, eye-level placement, and sconce spacing for single, double, circular, and arched mirrors.
Open Blind Size Calculator Calculate the exact width and height for window blinds. Supports inside and outside mounts, metric or imperial units, three-point measurements, and standard overlaps.
Open Cord of Wood Calculator Calculate how many cords of firewood are in any wood stack by entering length, width, and height. Get full cords, face cords, cubic feet, and total cost instantly.
Open Data Usage Calculator Calculate your daily and monthly internet data usage by activity. Enter streaming, gaming, video calls, and browsing time to get a full breakdown and estimated cost.
Open Dilution Ratio Calculator Calculate dilution ratios instantly. Find concentrate and water volumes for any 1:x ratio, solve C1V1=C2V2, convert ratio to dilution factor, and build serial dilution series.
Open Electricity Cost - Single Usage Calculator Calculate exactly how much electricity costs for one use of any appliance. Enter watts, run time, and your rate to get cost per use, kWh used, and CO2 emitted.
Open EUI Calculator: Energy Use Intensity for Buildings Calculate a building's Energy Use Intensity (EUI) in kBtu/ft² or kWh/m². Enter electricity, gas, and fuel use, compare to benchmarks, and see CO2 emissions.
Open Gas vs Electric Dryer Calculator Compare gas and electric dryer running costs. Enter your energy rates and usage to see cost per load, annual totals, and payback period side by side.
Open Generator Wattage Calculator Calculate the generator size you need from appliance running and starting watts. Includes altitude derating and a 25-appliance wattage reference table.
Open Grocery Budget Calculator Estimate your monthly grocery budget using USDA food plan data. Enter household size, ages, and spending tier to get a recommended budget with a category breakdown.
Open Hot Tub Cost Calculator Calculate the true cost of owning a hot tub: purchase price, installation, electricity, chemicals, water, maintenance, and 10-year total cost of ownership.
Open House Cleaning Cost Calculator Estimate house cleaning costs by square footage, type, frequency, and region. Covers standard, deep clean, move-out, and add-on services with a full cost breakdown.
Open How Many Tables Calculator Find out how many tables you need for any event: enter guests, table type and comfort level to get table count, chair count and minimum venue space.
Open LED Savings Calculator Calculate how much you save switching to LED bulbs: annual electricity cost savings, payback period, CO2 reduction, and a year-by-year savings chart.
Open Lighting Calculator Calculate exactly how many lumens, LED watts, and light fixtures your room needs. Enter dimensions, room type, and finishes for a precise IES-based result.
Open Lumens to Watts Calculator Convert lumens to watts for any bulb type using luminous efficacy. Supports LED, CFL, halogen and incandescent presets, reverse mode, and yearly energy breakdown.
Open Microwave Wattage Converter Convert microwave cooking times between any two wattages. Enter the recipe wattage, cooking time, and your microwave wattage to get the adjusted time with a breakdown.
Open Period Products Cost Calculator Calculate how much you spend on tampons, pads, menstrual cups, or period underwear per month, per year, and over a lifetime. Compare products and see your savings.
Open Pool Salt Calculator Calculate exactly how much pool salt to add (or how much water to replace) to hit your target ppm. Works in gallons/pounds and litres/kg with cost estimate.
Open Quit Smoking and Save Calculator See how much money you save when you quit smoking, day by day and year by year. Includes compound investment growth, health milestones, and a savings schedule.
Open Recessed Lighting Calculator Calculate how many recessed lights you need for any room. Enter dimensions, room type, and fixture lumens to get fixture count, spacing, layout, and energy cost estimates.
Open Roll Length Calculator Find material length on any roll from outer diameter, core, and thickness. Metric and imperial. Reverse mode: find the outer diameter needed for a target length.
Open Rug Size Calculator Find the ideal rug size for any room. Enter room and furniture dimensions, choose living room, dining room, bedroom or hallway, and get the perfect rug dimensions instantly.
Open Sofa Size Calculator Find the ideal sofa size for your living room. Enter your room dimensions and door width to get a recommended sofa length, clearance checks, and a sofa type guide.
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