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Browse the tool catalog | Page 104

Search and filter the online tool directory by task, format, and category, then open detailed pages with clear inputs, examples, and execution context. Page 104.

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Math, Date & Finance639

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

Images, Audio & Video597

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 & Web188

Developer utilities, networking, web debugging, and automation helpers

Conversion & Encoding172

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

Absorbance Quantification and Acid-Base Calculations

JSON Structure Surgery

Tabular Data Cleanup, Shaping, and Normalization

Professional Assembly of an Excel Workbook

PDF Repair, Cleanup, and Slimming

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Health

TPN Macronutrient Calculator (Glucose/AA/Lipid)

Calculate glucose/amino-acid/lipid delivery (grams and kcal), total and non-protein calories, the non-protein kcal:g nitrogen ratio and per-kg values from a parenteral nutrition prescription. Energy densities: dextrose 3.4 kcal/g, AA 4.0 kcal/g, lipid 20% ≈ 2.0 kcal/mL. Targets (ASPEN/ESPEN): 20–30 kcal/kg/day, protein 1.0–1.5 g/kg/day. This is a prescription-analysis aid, not a compounding recipe. Derived from ASPEN 2016, ESPEN 2019, McClave 2016, Mirtallo 2004. Not medical advice.

Health

TPN Osmolality Estimator (Peripheral/Central)

Estimate the osmolality (mOsm/L) of a parenteral nutrition admixture to help choose peripheral vs central access. Sum-of-solute formula: Osm ≈ Dextrose(g/L)×5 + AA(g/L)×10 + Electrolytes. Thresholds: ≤ 900 peripheral; 900–1200 caution; > 1200 central. Lab-measured value is the gold standard. Derived from Mirtallo 2004, Pittiruti 2009, Dugan 2014. Not medical advice.

Health

Transferrin Saturation (TSAT) Calculator

Calculate Transferrin Saturation (TSAT) = Serum Iron / TIBC × 100% (matching units, µg/dL or µmol/L). Reference range ≈ 20–50% in men and 15–50% in women. TSAT < 20% (or < 15% in premenopausal women) indicates iron deficiency (iron-deficiency anemia from chronic blood loss, inadequate intake, malabsorption), and is highly specific when ferritin is also low. TSAT > 50% (> 45% premenopausal) indicates iron overload or ineffective erythropoiesis: hereditary hemochromatosis, thalassemia major, sideroblastic anemia, repeated transfusions, or excessive iron therapy. Note serum iron has diurnal variation (morning high, evening low) and is shifted by recent iron ingestion, infection/inflammation, and hepatic disease — interpret with ferritin and CRP. Derived from Camaschella Blood 2019, Guyatt 1992, and MDCalc. Not medical advice.

Text Processing

Three-Way Text Comparison & Merge Suite

Line/word/char diff with ignore rules, three-way merge with conflict markers, and unified patch

Health

Urea Reduction Ratio (URR) — Dialysis Adequacy

Calculate the Urea Reduction Ratio (URR) for a single hemodialysis session: URR (%) = (Pre-BUN − Post-BUN) / Pre-BUN × 100. KDOQI recommends a minimum URR ≥65% and a target dose ≥70%. URR is a simple adequacy marker but is being phased out in favor of Kt/V, which also accounts for urea generation and volume contraction. Derived from the KDOQI Clinical Practice Guideline for Hemodialysis Adequacy. Valid for single hemodialysis sessions with BUN drawn pre- and immediately post-treatment; not for peritoneal dialysis. Not medical advice.

Health

Trough Level Estimator (Cmin = Cmax · e^(-kτ))

Predict the trough concentration Cmin from a measured peak concentration Cmax during therapeutic drug monitoring (TDM): Cmin = Cmax · e^(-kτ), where k = ln2 / t½ and τ is the time from the peak to the next dose. Inputs are the measured peak, the elimination half-life, and the dosing interval. Also reports the fraction of the peak remaining at the trough and the peak-to-trough drop. This tool takes a measured Cmax (the TDM workflow), unlike drug-half-life-dose (which derives C0 from Dose/Vd) and dosing-interval-designer (which outputs a dimensionless peak/trough ratio, not an absolute concentration). Valid for one-compartment first-order elimination with the peak measured post-distribution. Not medical advice.

Math & Numbers

Thermal Resistance Converter (K/W / °C/W / °F·h/BTU)

Convert thermal resistance between K/W (kelvin per watt, SI base), °C/W (1 = 1 K/W, since Δ1 K = Δ1 °C exactly), and °F·h/BTU International Table (1 = 1.8956342 K/W). Converts via K/W to the target unit and lists the equivalent value in all three units for reference. Reference values: CPU heatsink ≈ 0.1–0.3, LED thermal path ≈ 5–20, natural convection ≈ 1 K/W.

Science

Two-Body State Vector Propagator

Propagate a spacecraft/satellite state vector (r₀, v₀) to time t₀+Δt under two-body gravity via the universal-variable (f-and-g) method, and derive the classical orbital elements

Math & Numbers

Thermal Conductivity Converter (W/(m·K) / kcal / BTU)

Convert thermal conductivity between W/(m·K) (watt per metre-kelvin, SI base, = W/(m·°C)), kcal/(m·h·°C) (1 = 1.1627778 W/(m·K)), and BTU/(hr·ft·°F) (1 = 1.7307347 W/(m·K)). Converts via W/(m·K) to the target unit and also lists the equivalent value in all three units for reference. Reference values: copper ≈ 401, aluminum ≈ 237, steel ≈ 50, water ≈ 0.6, air ≈ 0.026, insulation foam ≈ 0.03 W/(m·K).

Math & Numbers

Torque Unit Converter (N·m / lbf·ft / kgf·m / lbf·in)

Convert torque (moment of force) between N·m (SI base), lbf·ft (pound-foot), kgf·m (kilogram-force-metre), and lbf·in (pound-inch). Factors based on standard gravity g₀ = 9.80665 m/s² and 1 lbf = 4.4482216152605 N. Converts via N·m to the target unit and also lists the equivalent value in all four units for reference. Used for mechanical specs, automotive, and fastener tightening torque.

Math & Numbers

Thermal Expansion Calculator (Linear / Volumetric)

Linear and volumetric thermal expansion of an isotropic material. Linear: ΔL = α·L₀·ΔT, L₁ = L₀·(1+α·ΔT). Volumetric: ΔV = 3α·V₀·ΔT (β = 3α for isotropic solids). Built-in typical α for carbon/alloy steel, aluminum, copper, austenitic stainless, titanium and glass, plus custom. ΔT in K or °C, length in mm, volume in mm³.

Math & Numbers

Thermal Stress Calculator (σ = E·α·ΔT)

Thermal stress in a fully constrained member under a uniform temperature change: σ_th = E·α·ΔT. Built-in typical Young's modulus E and expansion coefficient α for carbon/alloy steel, aluminum, copper, austenitic stainless and titanium, plus custom values. ΔT in K or °C (same magnitude), result in MPa. Heating (ΔT>0) → compressive stress in the member.