Math & science

Calculate distance and similarity between numeric vectors using methods including cosine, euclidean, jaccard, and more.

Inspect and analyze embedding vectors: compute statistics like dimensions, mean, median, norms, sparsity, and top activations.

Solve the optimal assignment problem using the Hungarian algorithm. Enter a cost matrix and find the lowest-cost one-to-one assignment of workers to tasks.

View a live aurora borealis (northern lights) forecast map powered by NOAA OVATION data. Click anywhere on the map to see the current aurora visibility chance for that location.

Calculate the price per square meter of a flat, house, or land plot from the total price and area. Also shows the price per square foot and square yard.

Calculate the motion blur in your video from the frame rate and shutter. Enter the shutter as a speed or an angle, get both along with the exposure time and the 180° rule shutter, and watch an animated preview of how the motion will look. Runs in your browser.

Calculate your GPA from your course grades and credits on the 4.0 scale. Add courses with letter grades from A+ to F to get the semester GPA, and enter your current GPA and credits to see your new cumulative GPA. Runs in your browser.

Watch the planets orbit the Sun in an animated solar system, speed up time and click any planet to learn its key facts.

See how a glass prism splits white light into a rainbow spectrum. Change the prism material, apex angle and angle of incidence, and get the refractive index and deviation angle for red and violet light.

Convert integers of any size between binary, octal, decimal and hexadecimal.

Convert decimal numbers to binary instantly, including integers of any size.

Convert binary numbers to decimal instantly, including integers of any size.

Convert decimal numbers to octal instantly, including integers of any size.

Convert octal numbers to decimal instantly, including integers of any size.

Convert decimal numbers to hexadecimal instantly, including integers of any size.

Convert hexadecimal numbers to decimal instantly, including integers of any size.

Convert binary numbers to octal instantly, including integers of any size.

Convert octal numbers to binary instantly, including integers of any size.

Convert binary numbers to hexadecimal instantly, including integers of any size.

Convert hexadecimal numbers to binary instantly, including integers of any size.

Convert octal numbers to hexadecimal instantly, including integers of any size.

Convert hexadecimal numbers to octal instantly, including integers of any size.

Convert between world currencies using live European Central Bank rates, and see how the pair moved over the last month.

Convert USD to EUR at the latest European Central Bank reference rate, with a chart of how the rate has moved.