Wetenschappelijke tools

Atomic mass calculator free — IUPAC element lookup or weighted isotope average. Atomic number and u/g/mol. No signup.

Electron configuration generator free — full and noble-gas notation for any element. Aufbau rules + exceptions. No signup.

Find oxidation numbers in chemical formulas using standard rules — H2SO4, KMnO4, NH3, and polyatomic ions. Free, instant, browser-based.

Calculate radioactive decay with half-life — remaining amount, elapsed time, or half-life from N = N₀(½)^(t/t½). Free, instant, browser-based.

Convert chemical formulas to names and names to formulas — ionic compounds, acids, hydrates, and common molecules. Free, instant, browser-based.

Convert DNA to RNA — replace T with U on the coding strand, or transcribe from the template strand. FASTA support. Free, instant, browser-based.

Translate RNA to protein with the standard genetic code — reading frames, AUG start, stop codons, and codon table. Free, instant, browser-based.

Calculate GC content and base composition for DNA or RNA — percentages, counts, AT/GC ratio, and FASTA support. Free, instant, browser-based.

Calculate DNA primer melting temperature (Tm) — Wallace rule, salt-adjusted, and long-oligo formulas with adjustable Na⁺. Free, instant, browser-based.

Calculate protein molecular weight from amino acid sequence — average mass in Da and kDa with composition breakdown. Free, instant, browser-based.

Find restriction enzyme cut sites in DNA — EcoRI, BamHI, HindIII, and 30+ common enzymes with cut positions. Free, instant, browser-based.

Predict child blood types from parent ABO and Rh types — Punnett squares, probabilities, and combined outcomes like A+ or O−. Free, instant, browser-based.