Explore our professional tools for your daily tasks.
Accurately estimate the square footage and total cost of materials for a variety of common shapes, including rectangles, circles, triangles, and more.
Estimate the cooling or heating needs of your room or house with our BTU calculator. Calculate exact requirements based on size, insulation, and climate.
Estimate the volume and weight of concrete needed for slabs, columns, stairs, and more. Get precise bag counts and truck delivery estimates.
Accurately calculate the exact dimensions for stairs including total run, stringer length, number of steps, and angle of inclination.
Find the day of the week for any historical or future date. Discover fascinating trivia and facts about every day of the week.
Count the number of days between two dates or calculate a future/past date. Includes options for business days, weekends, and holidays.
Estimate the total number of tiles necessary to cover a floor, roof, or wall, including calculations for grout gaps, overlaps, and total box costs.
Accurately estimate your total roof area and the necessary amount of materials needed, including roofing squares, bundles of shingles, and recommended overage.
Calculate the exact time difference between two times or dates. Get results in hours, minutes, and seconds with our precise duration tool.
Calculate the exact number of hours and minutes between two times or two dates with our free, online Hours Calculator.