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

Impulse Calculator

Compute the impulse delivered by a constant force over a time interval, equal to the change in momentum it causes.

basic
24,202 4.9 1 min
Other

Unix Timestamp Converter

Convert in either direction between Unix timestamps (seconds since 1970-01-01 UTC) and human-readable UTC date/time stri...

basic
4,987 4.7 1 min
Physics / Mechanics

Density Calculator

Compute density (ρ = m/V), or rearrange the formula to solve for mass or volume given the other two.

basic
22,406 4.3 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.