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Browse the tool catalog | Page 239

Search and filter the online tool directory by task, format, and category, then open detailed pages with clear inputs, examples, and execution context. Page 239.

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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

Docs Pricing About Terms of Service Privacy Policy Contact

Finance

Moving Average Calculator

Calculate various types of moving averages (SMA, EMA, WMA, TMA) with trend analysis and trading signals

Astronomy

Moon Phase Calculator

Calculate the current moon phase and illumination

Text Processing

Messy Text to Structured Data Workbench

Infer tables from pasted text, mixed delimiters, key-value lines, or HTML and export CSV, JSON, and Markdown.

Science & Education

Microscope Scale Bar Calibrator

Calculate microscope object scale, field of view, diffraction limits, Nyquist sampling, and download a transparent SVG scale bar.

Science & Education

Maxwell Stress Tensor Calculator

T_ij = ε₀(E_iE_j − ½E²δ_ij) + (1/μ₀)(B_iB_j − ½B²δ_ij) from the full E and B vectors, with the 3×3 matrix, energy densities, trace check, and traction on a chosen surface.

Math & Numbers

Minimum Spanning Tree (Kruskal / Prim)

MST with both textbook algorithms: Kruskal's sorted accept/cycle-reject log and Prim's component growth, cross-checked to agree on the total weight; disconnected graphs rejected.

Security

ML-KEM / Kyber Keypair & Encapsulation Tester

Generate ML-KEM-512/768/1024 (FIPS 203 / CRYSTALS-Kyber) keypairs, encapsulate a random shared secret against the public key, decapsulate it with the private key, and verify both sides match — with the exact wire sizes of all three parameter sets checked live against the standard.

Health

Milliequivalent Converter (mEq ↔ mg / mmol)

Convert mEq ↔ mg/mmol (or mEq/L ↔ mmol/L, mg/L) from molecular weight and valence: mEq = mmol × valence, mg = mmol × MW. Not medical advice.

Health

Mean Arterial Pressure (MAP)

Calculate MAP = DBP + (SBP − DBP)/3. Normal 70–100; ≥65 sepsis target; <65 hypoperfusion. Derived from Geddes 1984, SSC 2021, BTF 2017, StatPearls, LITFL. Not medical advice.

Health

Mean Platelet Volume (MPV) Analyzer

Analyze Mean Platelet Volume (MPV) in fL, an index of platelet production kinetics. Reference range ≈ 7.5–11.5 fL (lab- and method-dependent). Low MPV (< 7.5 fL, small old platelets) indicates suppressed marrow production (aplastic anemia, chemotherapy/radiation, recent platelet transfusion, iron-deficiency regeneration, Wiskott-Aldrich). High MPV (> 11.5 fL, large young platelets) indicates peripheral destruction with compensatory turnover or macrothrombocytopenia (immune thrombocytopenia ITP, post-splenectomy, myeloproliferative neoplasms, severe sepsis in recovery, Bernard-Soulier / MYH9, megaloblastic anemia; elevated MPV after acute MI marks platelet activation and adverse prognosis). Optionally enter the platelet count to refine the differential: low platelets + high MPV → peripheral destruction; low + low → underproduction; high + low → reactive thrombocytosis; high + high → myeloproliferative neoplasm. Pre-analytical caveat: platelets swell in EDTA over ~2 h raising MPV, and values are method-dependent (impedance > optical > immuno) — compare within the same lab and analyzer. Derived from Bath 1996, Leader 2012, Vagdatli 2010, and MDCalc. Not medical advice.

Health

Medication Dose/Rate Calculator (mg/kg/hr etc.)

Convert bidirectionally between a prescribed clinical dose and an infusion-pump rate (mL/hr). Supports weight-based (mcg/kg/min, mg/kg/hr, units/kg/hr) and flat (units/hr) dosing. Two directions: Dose → Rate and Rate → Dose. ALL high-alert infusions require independent double-checking (ISMP). Derived from Macklin 2011, ISMP, Royal Marsden 9th ed. 2015, and MDCalc. Not medical advice.

Health

MELD-Na Score (Sodium-Modified MELD)

Calculate the UNOS/OPTN MELD-Na score — the sodium-modified MELD used for adult liver transplant allocation in the US from January 2016 until superseded by MELD 3.0 in July 2023. First compute the base MELD(i) (same formula as MELD, clamped 6–40). If MELD(i) > 11: MELD-Na = MELD(i) + 1.32·(137 − Na) − 0.033·MELD(i)·(137 − Na), with sodium clamped to 125–137 mmol/L. If MELD(i) ≤ 11, MELD-Na = MELD(i) (no sodium adjustment). The result is rounded and clamped to 6–40. Rationale: hyponatremia (Na < 137) predicts worse waitlist mortality beyond what MELD(i) captures, so the score is inflated; the interaction term scales the sodium penalty down at very high MELD(i). Derived from Kim/Biggins 2008 (NEJM) and UNOS/OPTN policy. Not medical advice.