Catalog

Convert between binary, octal, decimal, and hexadecimal with ASCII lookup and system descriptions.

Calculate mean, median, mode, variance, std dev, and quartiles for any dataset plus a 10-term glossary.

10 vegetables with calories, nutrients (% DV), origin, preparation methods, and fascinating facts.

8 percentage calculators: X% of Y, percent change, reverse percentage, tip splitter, discount, markup, compound interest.

8 percentage calculators: X% of Y, percent change, reverse percentage, tip splitter, discount, markup, compound interest

8 classic math puzzles — Monty Hall, Birthday Problem, Two Egg, Infinite Hotel — with hints and full explanations.

10 fruits with calories, nutrients, origin, ripening tips, and surprising facts — including why bananas are radioactive.

10 evidence-based superfoods with nutrients, research citations, and practical tips on maximizing their benefits.

10 essential nutrients — Vitamin D, B12, Iron, Calcium, Magnesium — with RDV, sources, deficiency symptoms, and tips.

9 world cuisines with signature flavors, staple ingredients, iconic dishes, cooking philosophy, and UNESCO heritage status.

9 world cuisines with signature flavors, staple ingredients, iconic dishes, cooking philosophy, and UNESCO heritage stat

10 fermented foods — kimchi, sourdough, miso, kefir, tempeh — with fermentation agent, time, benefits, and amazing facts.

10 fermented foods — kimchi, sourdough, miso, kefir, tempeh — with fermentation agent, time, benefits, and amazing facts

6 major fast food chains with founding stories, location counts, revenue, and jaw-dropping facts you never knew.

10 cooking methods — braising, roasting, sous vide, fermentation — with heat, time, best uses, and pro tips.

10 major food allergens with hidden sources, label terms to avoid, cross-reactions, and severity information.

8 foods with origin stories — chocolate from Aztecs, pasta predating tomato sauce, potatoes from Peru — with timelines.

10 human organs with weight, function, fascinating facts — the liver regenerates, skin replaces itself every 27 days.

10 evidence-based mental wellness tips with the science behind each practice — from 5-5-5 breathing to scheduled worry time.

10 evidence-based mental wellness tips with the science behind each practice — from 5-5-5 breathing to scheduled worry t

10 first aid guides — CPR, choking, bleeding, burns, seizure — with step-by-step instructions and critical tips.

15 essential medical terms — triage, sepsis, iatrogenic, prognosis, anaphylaxis — explained in plain English.

5 pain assessment scales — NRS, Wong-Baker FACES, FLACC, McGill, DVPRS — with how and when each is used.

6 vital signs — heart rate, blood pressure, respiratory rate, temperature, SpO2, pain — with normal ranges and measurement.

6 vital signs — heart rate, blood pressure, respiratory rate, temperature, SpO2, pain — with normal ranges and measureme

7 immune system components — white blood cells, antibodies, innate vs adaptive immunity — with functions and facts.

6 medication classes — analgesics, antibiotics, SSRIs, statins, beta-blockers, antihistamines — with mechanisms and notes.

6 medication classes — analgesics, antibiotics, SSRIs, statins, beta-blockers, antihistamines — with mechanisms and note

8 common illnesses — cold vs flu differences, COVID, UTI, diabetes, hypertension — with causes, symptoms, and treatments.

8 common illnesses — cold vs flu differences, COVID, UTI, diabetes, hypertension — with causes, symptoms, and treatments

13 fascinating anatomy facts — babies have 270 bones, the liver regenerates, your tongue print is unique.