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 / Mechanics

Work Calculator

Compute the mechanical work done by a constant force over a displacement, including the cosine factor for off-axis force...

basic
5,745 4.8 1 min
Other / Tech

Download Time Calculator

Estimate how long a download will take given a file size in MB or GB and an internet connection speed in Mbps.

basic
15,291 4.5 1 min
Physics / Electricity

Battery Life Calculator

Estimate how long a battery will last from its capacity (mAh or Ah) and the load current draw, with a configurable real-...

basic
22,498 4.6 1 min
Math / Geometry

Arc Length Calculator

Compute the arc length of a circle from the radius and the central angle in degrees.

basic
3,937 4.6 1 min
Math / Percentage

Percentage Change Calculator

Compute the percentage change from an original value to a new value — positive for an increase, negative for a decrease.

basic
22,448 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.