Building design

Generate random integers, decimals, dice rolls, coin flips, and list picks with cryptographic randomness. Supports unique values, sorting, and statistics. This random number generator produces...

Estimate interior paint in gallons and quarts for walls, ceiling, trim, and primer — adjusts for textured surfaces, sheen, and number of coats. How the...

Estimate brick count and mortar bags for walls, facades, fire pits, and columns. Includes a 10-type brick library, opening subtractions, bond-pattern waste, and Type...

Estimate flooring sqft with install-pattern waste, boxes by SKU coverage, carpet roll length, underlayment rolls and transition strips. How the math works Flooring orders are area...

Estimate tiles, boxes, thinset, and grout for floors, backsplashes, and showers — pattern-aware waste, multi-surface builder, and per-surface breakdown in one tool. Why pattern changes...

Estimate drywall sheets, joint compound, tape, screws, and corner bead for rooms or single walls. How the math works Drywall is square-footage work with a deduction...

Compare 22 large language models by price, context window, max output and release date, then estimate monthly API cost for your own token volume. This...

Compute flow rate, velocity, required pipe diameter, and Reynolds number for water, oil, and air in circular pipes. This pipe flow calculator covers the three...

Calculate wire voltage drop for single and three phase circuits using NEC Chapter 9 resistance data, with distance-vs-drop chart and 3%/5% compliance check. This voltage...

Solve ax² + bx + c = 0 and see the discriminant, roots, vertex, y-intercept, and a parabola graph. This quadratic formula calculator solves any...

Estimate appliance running cost, energy use in kWh, and CO2 emissions from wattage, hours of use, and your per-kWh rate. The electricity cost calculator turns...

Live word count, character count, reading time, keyword density and platform character limits for writers, students and SEO. A live word and character counter for...

Convert times between cities, view a live world clock and plan cross-zone meetings. This time zone converter translates any date and time from one city...

Calculate voltage, current, resistance and power from any two known values using Ohm's law and Joule's law. This Ohm's law calculator solves V = I·R...

Calculate mean, median, mode, range, variance and standard deviation from any list of numbers, plus weighted averages for grades and portfolios. The Average Calculator computes...

Calculate sale price, amount saved and effective discount from any percentage or fixed amount. Work out the sale price and the amount saved from any...

Add, subtract, and convert time in hours, minutes, and seconds. Includes time difference between two clock times and a unit converter. The Time Calculator performs...

Measure clicks per second over a chosen test duration from 1 to 100 seconds. Tracks total clicks, average CPS and peak CPS across a...

Calculate area, perimeter, and diagonals for 10 shapes with live SVG visualization and unit selection. Geometry Calculator computes area and perimeter (plus diagonal or apothem...

Convert between ounces, pounds, pints, gallons and more — US customary and UK imperial units, with metric equivalents. This converter handles both weight and volume...

Convert flow rate between L/min, L/s, m³/h, GPM, CFM, bbl/day and 13 total units with instant all-units output and click-to-copy values. The Flow Rate Converter...

Convert tape measure inch fractions (1/16, 1/8, 1/4, 3/8, 1/2, 5/8, 3/4) to decimal inches, feet + inches, millimeters and centimeters with selectable precision. This...

Convert millimeters to feet, feet to millimeters and other length units in one step. For mm to ft use ft = mm ÷ 304.8;...

Convert slope between percent, degrees, radians, rise:run ratio, per mille, mm/m and cm/m with a visual triangle diagram. The Slope Converter turns any slope value...

Convert between angle, sin, cos, tan, cot, sec, and csc with a unit circle view and common angles table. The Trigonometry Converter computes all six...