ADA Ramp Grade Calculator
Compute the run length and slope percentage of an accessibility ramp from the rise. Reports whether the slope meets ADA'...
Tipping, cooking, travel, and other useful little tools.
The calculators that come up in day-to-day life — tip splitting, cooking conversions, fuel costs, and trip planning.
Compute the run length and slope percentage of an accessibility ramp from the rise. Reports whether the slope meets ADA'...
Compute the volume of each component (base, hardener, reducer) required to mix a target total volume of paint at a given...
Compute the appropriate amount of liquid laundry detergent per load (in fluid ounces and tablespoons) based on load size...
Compute the number of steps, individual riser height, individual tread depth, and the diagonal stringer length for a sta...
Compute the number of scoops of powdered baby formula and the corresponding water volume needed for a target feed in oun...
Compute the total number of segmental retaining-wall blocks needed for a given wall length, wall height, and block dimen...
Compute the number of asphalt-shingle bundles needed to cover a given roof area, including a default 10-15 % waste facto...
Estimate the gallons of rainwater collected from a roof during a storm: gallons = roof_area_sqft × rainfall_in × 0.6234...
Compute how much thinner to add to a paint base for a given thinner-to-paint ratio (commonly 10 % for spray-gun viscosit...
Compute the tons of crushed stone (or driveway gravel) needed to cover an area at a target depth, using a typical densit...
Compute the US-EPA Air Quality Index (AQI) from a 24-hour average PM₂.₅ concentration in µg/m³. Uses the official piecew...
Compute the number of board feet for one or more pieces of lumber from the nominal thickness, width, and length: BF = T_...
Compare two pizzas by their slice area and price-per-square-inch. Lets you decide whether the larger pie is actually the...
Compute the gallons of asphalt seal-coat needed to cover a driveway, given the area in square feet, the planned number o...
Adjust a recipe's microwave time when your microwave's wattage differs from the wattage the recipe was written for: t_ne...
Estimate the heat (BTU) released by burning seasoned firewood from the species's typical BTU/cord rating, the number of...
Estimate the gallons of paint needed for a room: compute wall area = 2(L+W)×H − door & window area, then divide by cover...
Compute the solar-panel array area needed to produce a target daily energy (kWh) at a site with average peak-sun-hours (...
Compute the required net free vent area (NFA) for an attic using either the 1-to-150 ratio (no vapor barrier) or the 1-t...
Compute the number of square tiles needed to cover a floor, including a waste allowance for cuts and breakage. tiles = c...
Compute how many 4 × 8 ft (32 ft²) drywall sheets are needed to finish all four walls and the ceiling of a rectangular r...
Compute the number of concrete masonry units (CMU blocks) needed to build a wall, including a default 5-10 % waste facto...
Compute how many bags of pre-mixed concrete are needed to fill a slab, footing, or column of given length, width, and de...
Calculates the volume of gravel required to cover a rectangular area to a specified depth: volume (yd³) = (length × widt...