Everyday Calculators

Look up any actor's Kevin Bacon number — the degrees of separation from Kevin Bacon through shared film appearances. Database of 200+ actors with full connection chains shown. Based on the Six Degrees of Kevin Bacon theory.

Calculate the theoretical hull speed of any displacement vessel from waterline length. Returns speed in knots, km/h, and mph with Froude number, speed-to-length ratio, and passage time estimates.

Calculate how many cords of firewood you need for heating season. Also convert between full cord, face cord, rick, and cubic feet.

Convert gradient (slope) between angle in degrees, ratio, and percentage. Useful for roads, ramps, roofs, drainage, accessibility, and landscaping.

Convert linear feet to square feet by entering width. Calculate square footage from linear footage for flooring, fencing, lumber, and materials.

Convert square feet to linear feet by entering material width. Useful for flooring, fencing, roofing, siding, and trim calculations.

Calculate total watch time for a YouTube playlist at normal speed and at 1.25x, 1.5x, 1.75x, and 2x playback speeds.

Compare Disney dining plan cost against estimated meal, snack, and mug value using party size, nights, plan type, and custom prices.

Calculate stitched size and fabric cut size from stitch count, fabric count, over-one or over-two stitching, and margins.

Calculate comfortable TV mounting height from screen diagonal, aspect ratio, eye height, viewing distance, and furniture clearance.

Calculate LEGO cents per piece after discount, tax, shipping, rewards, and optional minifigure value for better set comparisons.

Compare prayer time calculation methods using date, latitude, longitude, UTC offset, Fajr angle, Isha angle, and Asr method.

Calculate soil cubic yards, cubic feet, bag count, and estimated cost for raised beds, topsoil, compost, mulch, and landscaping fill.

Calculate linear feet from length and quantity or convert area to linear footage using material width, waste percentage, and stock length.