Wallpaper Rolls Needed for a Room Calculator
Estimates how many wallpaper rolls are needed to cover four walls, accounting for doors and windows: strips per roll = f...
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.
Estimates how many wallpaper rolls are needed to cover four walls, accounting for doors and windows: strips per roll = f...
Compute the cubic-yards and tons of sand bedding needed under a paver patio or walkway given the area and bedding depth....
Compute the coffee-to-water ratio for cold brew. Concentrate: 1:4 to 1:5; ready-to-drink: 1:8 to 1:12. Returns the grams...
Compute the gallons (and quarts) of wood stain needed for a deck or fence. Wood absorbs more stain than paint; typical c...
Compute how many hours a propane tank will run a gas grill, from the tank weight, the grill's rated BTU output, and prop...
Estimate how long it will take to fill a swimming pool from a garden hose, given the pool volume in gallons and the hose...
Compute how many minutes a sprinkler needs to run to deliver a given depth of water (typically 1 inch / week) over a law...
Compute the probability that at least two people in a group share the same birthday, using the classic 1 − (365! / ((365...
Compute the yearly energy and dollar savings from replacing an incandescent bulb with an equivalent-output LED. Inputs:...
Compute the pounds of grass seed needed for a lawn given the area and the recommended seed-rate (typically 5–10 lb/1000...
Compute the nameplate (rated) kWh of home-battery backup needed to run a load of P watts for H hours, given depth-of-dis...
Estimate the snow load on a roof from the snow depth and snow density: load (lb/ft²) = depth (in) · density / 12. Report...
Compute an electric vehicle's energy efficiency from total miles driven and total kWh consumed (from charging records or...
Compute the number of plants that fit in a rectangular bed at a given on-centre spacing. Square grid: rows = floor(width...
Compute the number of risers, individual riser height, individual tread depth, and total horizontal run for a flight of...
Compute the cubic yards of concrete needed to pour a rectangular slab from length, width, and thickness. (L_ft · W_ft ·...
Compute the total watts and amps drawn by a Christmas / holiday lighting display: total_W = strings × bulbs_per_string ×...
Compute the number of fence posts needed for a rectangular yard from the perimeter, the desired post spacing, and the nu...
Estimate the BTU/h heater output required to raise a swimming pool from its current to a target temperature within a des...
Compute how much each person owes when splitting a group gift, with optional shipping and an organizer's share.
Estimate how long it takes to fill a rainwater collection barrel from a sloped roof at a given rainfall rate. 1 inch of...
Estimate the number of fence panels and posts needed for a yard enclosure: panels = ceil(perimeter / panel_width); posts...
Compute the voltage drop and percentage drop on a copper extension cord given AWG, one-way length, and current draw. Dro...
Estimate how many linear feet (and how many 10-oz tubes) of caulk are needed for a given joint length and bead diameter,...