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3099 tools

RNA Concentration Calculator (A260, 1 OD = 40 µg/mL)

json

Education

Beer–Lambert RNA quantitation: c = A260 × dilution factor × 40 / path length, plus ng/µL, total yield, a 0.1–1.5 linear-range check, and the RNA OD260/280 ≈ 2.0 purity reminder. Derived from Marmur & Doty, Sambrook & Russell, Manchester 1995, Thermo Fisher NanoDrop notes. Educational use only.

rna-concentration-a260

Bottleneck Effect Simulator (heterozygosity loss)

json

Education

Expected heterozygosity loss through a population bottleneck: H_final = H₀(1−1/2Nb)^t(1−1/2Nr)^g, retention, inbreeding F, harmonic-mean Ne, and one-generation allele survival. Derived from Wright 1931, Nei et al. 1975, Hartl & Clark 2007, StatPearls. Educational use only.

bottleneck-effect-simulator

Sports Data JSON Visualizer

html

Data Processing

Paste a JSON payload from any sports API (ESPN, TheSportsDB, balldontlie, football-data.org, api-sports.io) and get it rendered as a clean scoreboard with winners highlighted and game statuses.

sports-data-json-visualizer

Team Performance Comparison

html

Sports

Paste multiple teams' season stats as CSV and get a side-by-side comparison table with per-column best/worst highlighting, normalized 0–100 scores, composite ranking, and SVG bar visualizations.

team-performance-comparison

X-Linked Inheritance Probability Calculator

json

Education

Compute Punnett square and affected/carrier probabilities for X-linked recessive and dominant traits. Carrier mother × unaffected father → 50% of sons affected; affected father → all daughters affected, no sons. Derived from Morgan 1910, Griffiths, Hartl & Clark 2007, StatPearls. Educational use only.

x-linked-inheritance-probability

Allele Frequency Calculator (p = (2AA + Aa) / 2N)

json

Education

Compute allele frequencies from genotype counts: p = (2AA + Aa) / 2N, q = (2aa + Aa) / 2N. Derived from Hartl & Clark 2007, Griffiths, StatPearls. Educational use only.

allele-frequency-calculator

Drum Loop Slicer

file

Media

Detect drum-hit transients in an audio loop, slice it into individual hits, and export them as a ZIP with timing and optional MIDI.

audio-drum-loop-slicer

Calcium Unit Converter (mg/dL ↔ mmol/L)

json

Health

Convert total serum calcium between mg/dL and mmol/L. Factor 0.25 (atomic weight 40.078; × 4.0 inverse). Does not albumin-correct. Derived from Payne 1973, Young 1987, StatPearls, Endocrine Society. Not medical advice.

calcium-unit-converter

Creatinine Unit Converter (mg/dL ↔ µmol/L)

json

Health

Convert serum/urine creatinine between mg/dL and µmol/L. Factor 88.4 (molar mass 113.12 g/mol). Derived from KDIGO 2012, Young 1987, StatPearls. Not medical advice.

creatinine-unit-converter

Genotype Frequency Calculator

json

Education

Compute genotype frequencies from counts: freq = count / N. Also derives allele and phenotypic frequencies. Derived from Hartl & Clark 2007, Griffiths, StatPearls. Educational use only.

genotype-frequency-calculator

Hardy-Weinberg Equilibrium Calculator (p² + 2pq + q² = 1)

json

Education

Compute allele and expected genotype frequencies under Hardy-Weinberg equilibrium. Two modes: allele frequency or genotype counts with chi-square test. Derived from Hardy 1908, Weinberg 1908, Wigginton 2005, StatPearls. Educational use only.

hardy-weinberg-equilibrium

Hemoglobin Unit Converter (g/dL ↔ mmol/L ↔ g/L)

json

Health

Convert hemoglobin between g/dL, g/L, and mmol/L. Factor 0.6206 (g/dL→mmol/L, IFCC/IUPAC monomer, 16.1145 g/mmol); × 10 for g/L. Derived from WHO 2011, IFCC/IUPAC, Young 1987, StatPearls. Not medical advice.

hemoglobin-unit-converter