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
Physics / Electricity

Wheatstone Bridge Calculator

Solve a balanced Wheatstone bridge for the unknown resistor R₄ from the three known resistors R₁, R₂, and R₃ using the b...

basic
8,336 4.2 1 min
Physics / Mechanics

Free Fall Calculator

Compute how long an object takes to fall from a given height and the velocity it reaches just before impact, ignoring ai...

basic
20,671 3.9 1 min
Math / Percentage

Geometric Mean Calculator

Compute the geometric mean of a list of positive numbers — useful for averaging growth rates and ratios.

basic
17,787 4.9 1 min
Math / Geometry

Trapezoid Area Calculator

Calculate the area of a trapezoid given the lengths of its two parallel bases and the perpendicular height between them.

basic
14,515 4.1 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.