Convert, build, analyze, and calculate. Free online tools that turn complexity into clarity - without the guesswork.
From finance to design, each category curates a focused kit of tools, calculators and converters.
Finance tools that compute the standard numbers you would otherwise build in a spreadsheet: loan and mortgage...
Business tools for the operational numbers a small business runs every week: average order value, customer...
Photography tools for the optical and timing math that should happen before the camera comes out: depth of...
Cooking tools for the math you actually run into in a kitchen: scaling a recipe up or down, swapping volume...
Text tools for the cleanup, measurement, and transformation work that writers, editors, developers, and...
Health tools that compute the standard general-population estimates clinicians and coaches reach for: Body...
Math tools that compute the answers most often looked up in homework, lab notebooks, and back-of-envelope...
Design tools for color work, icon and asset preparation, depth-of-field math for photography that crosses...
Home and garden tools for the practical numbers that come up before a project starts: lawn area for seeding,...
This APR Calculator helps you accurately estimate the true cost of borrowing by calculating the Annual Percentage Rate (APR) for personal loans...
Converts among tokens, words, characters, and pages using a configurable encoder ratio (default 0.
Find the exact screen dimensions, pixel density (PPI), and ideal viewing distance based on screen resolution, aspect ratio, and size with this...
Improve text readability in large blocks of text or code by removing extra whitespace, standardizing heading formats, applying text transformations, and preserving...
Converts leather thickness between ounces, millimeters, inches, and traditional irons.
Converts text to binary and back using UTF-8 (8-bit bytes) or UTF-16 (16-bit code units, with surrogate pairs for characters above the...
Estimates due date from five inputs: last menstrual period, conception date, known due date, ultrasound, or IVF transfer, using standard obstetric offsets.
Shuffles lines of text using Fisher-Yates, with optional Line Groups (1 to 100) that shuffle whole blocks while preserving internal order.
This tool formats basic structured text blocks from a Word document into clean, consistent Markdown based on a predefined schema.
This tool converts simple shorthand syntax into clean, well-structured Markdown.
Computes ingredient ratios against flour weight, with flour anchored at 100 percent and every other row equal to (ingredient ÷ flour) ×...
The Days Between Dates Calculator is a simple tool that helps you find the duration between any two calendar dates.