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

2 × 2 Matrix Multiplication Calculator

Compute the 2×2 matrix product C = A · B from the eight scalar entries: c₁₁ = a₁₁·b₁₁ + a₁₂·b₂₁; c₁₂ = a₁₁·b₁₂ + a₁₂·b₂₂...

basic
8,503 3.9 1 min
Ecology

Wind Chill Calculator

Compute the wind-chill apparent temperature in Celsius from the actual temperature and wind speed using the North Americ...

basic
18,185 4.8 1 min
Conversions / Length

Speed Converter

Convert between km/h, mph, m/s, knots, and feet per second with exact conversion factors.

basic
10,202 4.1 1 min
Math / Geometry

Spherical Cap Volume Calculator

Compute the volume of a spherical cap (the portion of a sphere cut off by a plane) from the sphere's radius and the cap'...

basic
6,159 3.8 1 min
Math / Percentage

Exponent Calculator

Compute powers of any base, including negative and fractional exponents, with full decimal precision.

basic
10,489 4.7 1 min
Chemistry / Solutions

Gas Density Calculator

Compute the density of an ideal gas at given pressure and temperature from its molar mass, using ρ = PM/(RT).

basic
4,936 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

Reviewed by Daniel Oh

These calculators were technically reviewed by Daniel Oh for accuracy.