Text Processing
Split paragraphs into sentences by punctuation marks (period, question mark, exclamation mark, etc.)
sentence-splitterDevelopment
Analyze SQL queries for potential performance issues
sql-performance-analyzerDevelopment
Build simple SQL queries visually
sql-query-builderText Processing
Wrap whole text, lines, or sentences with typographic quotes, nested quote pairs, and language-aware punctuation.
quote-wrapperMath & Numbers
Convert US liquid quarts to liters with configurable decimal precision
quart-to-literScience & Education
E_n = (n + ½)ℏω from k + m, ω, or f: zero-point energy ½ℏω, equal spacing ħω, adjacent-transition photon wavelength, classical turning points, optional level ladder.
quantum-harmonic-oscillatorMath & Numbers
Jacobi/Legendre symbol with deterministic Miller–Rabin primality, Tonelli–Shanks square roots for prime moduli, and brute-force resolution for small composite moduli.
quadratic-residue-checkerMath & Numbers
Steady-state M/M/1 metrics: ρ, P0, L, Lq, W, Wq, state probabilities, and Little's-law cross-checks; unstable λ ≥ μ inputs are rejected.
queuing-theory-mm1Math & Numbers
Steady-state M/M/c metrics with the Erlang-C formula: offered load, P0, Pw, Lq, L, W, Wq plus Little's-law cross-checks; unstable λ ≥ cμ inputs are rejected.
queuing-theory-mmcHealth
Convert mOsm/L ↔ mOsm/kg ↔ mmol/L ↔ mmol/kg using the dissociation factor n and solution density; includes the serum reference range 275–295 mOsm/kg. Not medical advice.
osmolarity-converterEducation
1:N split from current and target densities, with keep/fresh-medium volumes and inter-passage doublings. Educational use only.
passage-dilution-ratioEducation
Classic Tm rules for DNA oligos: Wallace 2(A+T)+4(G+C) under 14 nt and the Sambrook/Primer3 salt formula 81.5 + 16.6·log₁₀[Na⁺] + 0.41×(%G+C) − 600/n from 14 nt, with auto switching, GC%, composition, and both estimates side by side. Wallace 1979 / Sambrook 1989 derived. Educational use only.
oligo-melting-temperature