Daniel Oh
Featured contributor MSc Applied Statistics; 7 years in analytics and data tooling.

Daniel Oh

Senior Contributor, Math & Statistics

0 calculators 0 articles Member since Jun 2026
Math / Geometry

Angle Between Vectors Calculator

Compute the angle between two 3D vectors using cos θ = (a·b) / (|a| · |b|), and report the angle in both degrees and rad...

basic
20,591 4.3 1 min
Other / Tech

Image File Size Calculator

Compute the uncompressed file size of a raster image from its pixel dimensions and bit depth (channels × bits per channe...

basic
16,679 4.2 1 min
tutorial Math

Percentages Without the Headache

Every "X% of Y" problem, every "what percent of", every percent-change question — written out the way you'd actually say them.

Daniel Oh Daniel Oh
3 min