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

Cone Volume Calculator

Compute the volume, slant height, and lateral surface area of a right circular cone from its radius and height.

basic
1,978 4.0 1 min
Other / Tech

Roman Numeral Converter

Convert between Arabic numbers (1–3,999) and Roman numerals — the calculator detects the direction automatically.

basic
578 4.6 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

Reviewed by Daniel Oh

These calculators were technically reviewed by Daniel Oh for accuracy.