Free online science and maths tools

Generates random coding DNA sequences using a chosen codon usage table.

Generates random protein sequences of a chosen length and amino acid composition.

Cuts a DNA sequence with chosen restriction enzymes and lists the fragment sizes.

Shows cut sites of restriction enzymes laid out along a DNA sequence.

Summarises which restriction enzymes cut a sequence and how many times.

Converts a pasted DNA sequence into its reverse, complement or reverse complement.

Back-translates a protein sequence into a DNA sequence using a codon usage table.

Randomly reorders the bases of a DNA sequence while keeping the composition.

Breaks a multi-record FASTA file into its separate sequences.

Rewrites a three-letter amino acid sequence as one-letter codes.

Displays a DNA sequence with its amino acid translation written under the codons.

Game of Life simulator running with WebAssembly, with pattern drawing and adjustable speed.

Shows a live depth map of your webcam feed computed on the GPU in the browser.

Fits a four-parameter logistic curve to assay data.

German-language calculator that converts duct air speed to volumetric flow and back.

Checks how well a camera sensor suits a telescope in terms of image scale.

Shows what a telescope and camera combination will frame against sky targets.

Calculates magnification and exit pupil from telescope and eyepiece focal lengths.

Reference page with formulas and a calculator for stress and deflection of beams on two supports.

Computes binomial and cumulative probabilities for a set number of trials.

Demo of a browser 2D chemical structure sketcher.

Tests independence in a contingency table of up to five rows and columns using Pearson's statistic.

Interactive chi-square curve with p-values and critical values.

Finds chi-square probabilities and critical values.