Category
Home & Family Calculators
Home, appliance, parenting, pet, aquarium, and household calculators.
Baby Formula Temperature Calculator
Estimate mixed-water temperature from hot and cool water amounts.
TV Viewing Distance Calculator
Estimate viewing distance from screen size.
Electricity Bill Calculator
Estimate electricity cost from kWh and an editable rate.
Air Conditioner BTU Calculator
Estimate cooling capacity from room area and BTU per square foot.
Air Conditioner Electricity Cost Calculator
Estimate air conditioner electricity use and cost.
Aquarium Volume Calculator
Calculate aquarium volume from length, width, and height.
Cup Volume Calculator
Estimate cylindrical cup volume.
Tile Area Calculator
Estimate tile count from room area, tile size, and waste percentage.
Microwave Heating Time Calculator
Scale microwave heating time between wattages.
Concrete Cost Calculator
Estimate concrete volume, bag count, and cost from slab dimensions.
Gravel Calculator
Estimate gravel volume, tonnage, and material cost.
Paint Calculator
Estimate gallons to buy and total paint cost from wall area, coats, and waste.
Square Footage Calculator
Calculate area in square feet and square meters from length and width.
Flooring Calculator
Estimate flooring boxes and project cost from room area, box coverage, and waste factor.
Related Guides
Start with a calculator, then read the supporting guide to compare formulas, assumptions, and common mistakes.
how-to article
Concrete Cost Calculator: How Many Bags or Yards Do You Need?
Estimate concrete quantity and project cost by bags or cubic yards with waste factor examples and a free calculator.
how-to article
Paint Calculator by Room Size: Walls, Ceiling, and Waste Factor
Find out how much paint you need by room size, wall area, coats, and waste factor with a free calculator.
scenario article
Gravel Calculator With Cost Estimate for Driveways and Landscaping
Estimate gravel volume and project cost for driveways, paths, and landscaping with a free calculator and examples.