Various useful calculators for different tasks.
Calculate the field of view of any camera. Enter the focal length, the subject distance and your sensor to get the horizontal,…
Find the focal length you need to fit a subject on your camera sensor. Enter the distance and subject size, pick a sensor…
Free mean calculator: find the arithmetic, geometric, and harmonic mean of up to 50 numbers instantly, all in one tool. Shows…
Free angle of impact calculator for bloodstain pattern analysis. Enter the width and length of an elliptical blood spatter…
Convert image pixel dimensions to a real print size using pixel density (PPI or px/cm). Check the best PPI for any viewing…
Free mean median mode calculator: instantly find the mean, median, mode, range, and midrange of up to 50 numbers with step-by-step…
Free NaNoWriMo calculator. Set your word goal and deadline, enter the words you have written so far, and get your daily word…
Calculate accuracy using three methods: standard diagnostic accuracy (TP/TN/FP/FN confusion matrix), prevalence-adjusted…
Estimate how much disk space a video will take. Pick the resolution and compression format, set the length and frame rate,…
Free HP calculator for DnD 5e. Find your character's maximum hit points and hit dice pool for any class, level or multiclass…
Calculate the volume of rainfall on any roof, yard or plot from the rain depth — or the catchment area needed to collect…
Calculate the probability that a value is below or above X using the normal distribution. Find P(x < X), P(x > X), z-score,…
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