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Browse the tool catalog | Page 240

Search and filter the online tool directory by task, format, and category, then open detailed pages with clear inputs, examples, and execution context. Page 240.

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Math, Date & Finance639

Calculators, numerics, date logic, statistics, and finance tools

Images, Audio & Video600

Image, audio, and video processing, conversion, and optimization tools

Design & Color294

Color, layout, graphics, visual styling, and design helper tools

Text & Writing206

Writing, cleanup, formatting, extraction, and text analysis tools

Developer & Web189

Developer utilities, networking, web debugging, and automation helpers

Conversion & Encoding172

Format, file, archive, unit, and encoding conversion tools

Excel Formula Engineering

Absorbance Quantification and Acid-Base Calculations

JSON Structure Surgery

Tabular Data Cleanup, Shaping, and Normalization

Professional Assembly of an Excel Workbook

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Health

MELD Score (End-Stage Liver Disease)

Calculate the current UNOS/OPTN base MELD(i) score for end-stage liver disease and transplant allocation: MELD(i) = (0.957·ln(creatinine) + 0.378·ln(bilirubin) + 1.120·ln(INR) + 0.643) × 10, rounded and clamped to 6–40. Creatinine is floored at 1.0, capped at 4.0 mg/dL, and forced to 4.0 if dialyzed ≥2× or on CVVHD ≥24 h in the past week; bilirubin and INR are floored at 1.0. NOTE: in the US, MELD-Na (2016) and then MELD 3.0 (Jul 2023, adds sex and albumin) have superseded this base MELD for adult allocation — this tool implements the classic base MELD(i) for education / non-US use. Derived from Kamath 2001 (Hepatology) and UNOS/OPTN policy. Not medical advice.

Math & Numbers

Minor (Local) Head Loss Calculator (h = K·v²/2g)

Compute the minor (local) head loss and pressure drop for pipe fittings, valves and bends: h_m = K·v²/(2g), ΔP_m = K·ρ·v²/2. Ships typical K values for 14 common components (gate/globe/check/angle/ball valves, 90°/45° elbows, tees, sudden contraction/expansion, sharp entrance/exit); choose a preset or supply a custom K. Supports n identical fittings in series. Returns head loss (m, ft) and pressure drop (Pa, kPa, bar). Density in kg/m³, g/cm³ or lb/ft³.

Math & Numbers

Mechanical Efficiency Calculator

Calculate the efficiency of a mechanical transmission (gearbox, belt, chain, etc.). η = P_out / P_in, returning the efficiency percentage and the power loss P_loss = P_in − P_out.

Utilities

Multi-Timezone Working-Hours Overlap Finder

Find meeting windows where 2–6 participants across time zones are all working. Computes UTC intersection, ranks by comfort, exports .ics.

Games

Memory Game

Classic memory matching game. Flip cards two at a time to find matching pairs; tracks moves and time, then grades you. Easy / standard / hard grids, emoji or number card faces.

Media

Media Metadata to JSON

Extract audio/video metadata as JSON with ffprobe.

Games

Minesweeper

Classic minesweeper with beginner, intermediate and expert presets, or custom boards. First click safe, flood-fill, right-click flags, chord on numbers.

Data Visualization

Mind Map Maker

Turn an indented list into a mind map with hierarchical branches

Text Processing

Mirror Text

Mirror text by swapping mirrored symbols (brackets, quotes, arrows, slashes) and reversing the string. Note: Unicode has no mirrored letter glyphs, so letters stay as-is. Plain Unicode text, no font needed.

Science & Education

Mendelian Punnett Square Calculator

Build a Punnett square for a Mendelian cross and auto-calculate genotype and phenotype ratios. Supports complete dominance, incomplete dominance (blending), codominance, and X-linked (sex-linked) inheritance — with each offspring cell's sex marked for X-linked crosses.

Math & Numbers

MB to Bytes

Convert megabytes to bytes with decimal vs binary interpretation, alternate-system comparison, and network-speed-aware transfer estimates

Math & Numbers

MB to MiB

Convert megabytes to mebibytes with decimal vs binary interpretation, alternate-system comparison, and network-speed-aware transfer estimates