Wetenschappelijke tools

Calculate gear ratio, output RPM, and torque multiplier for spur gear trains. Single-stage, compound 2-stage, RPM solver, and tooth-count finder for target ratios. Enter driver and driven tooth counts — get speed reduction and ideal torque gain. Free, browser-based.

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

Countdown and stopwatch timer for lab work. Presets for 1, 5, 10, 15, 30, and 60 minute incubations. Lap times, audio alert on completion. Free, runs in your browser.

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

Calculate solar elevation, azimuth, and noon altitude from latitude, date, and time. Find shadow length from sun angle and object height. Free, browser-based.

Build phylogenetic trees from distance matrices, aligned DNA sequences (UPGMA), or Newick strings — SVG diagram, ASCII tree, and export. Free, browser-based.

Convert microliters (µL) to milliliters, liters, nanoliters, cubic centimeters, and more. Instant lab volume conversions with all units shown at once. Free, browser-based.

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

Plan serial dilutions with fold factors, transfer volumes, and concentration at each step. Find how many steps to reach a target, or set up CFU plate-count dilutions. Full table with log₁₀ values and lab procedure. Free, browser-based.

Calculate orbital period from altitude or radius using Kepler's third law. Presets for ISS, geostationary orbit, Moon, and Earth around the Sun. Free, browser-based.

Convert chemical formulas to names and names to formulas — ionic compounds, acids, hydrates, and common molecules. 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.