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
Chemistry / Solutions

pH Calculator

Convert between hydrogen-ion concentration and pH, and find pOH for the complementary side of the scale.

basic
18,986 4.2 1 min
Conversions

Time Converter

Convert between common units of time including milliseconds, seconds, minutes, hours, days, weeks, months, and years.

basic
17,945 4.6 1 min
Other / Tech

Reading Time Calculator

Compute the time required to read a piece of text from the word count and your reading speed in words per minute. Report...

basic
19,758 4.3 1 min
Other / Tech

Hash Generator

Compute MD5, SHA-1, SHA-256, SHA-512, and CRC-32 digests for any input string. Useful for verifying checksums against pu...

basic
15,047 4.4 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.