∑ Zetta Calculators

Blog — Tech

Guides, worked examples and explainers.

Tech

JPEG vs PNG vs HEIC: Which Image Format to Use When

JPEG is for photos. PNG is for graphics. HEIC is the new efficient option. Here is when to use each.

May 7, 2026 Tech

Why Programmers Use Hex (and Should You?)

Hex is everywhere in programming — colors, memory addresses, low-level data. Here is why, and when to actually use it.

May 7, 2026 Tech

Hex Color Codes Explained: How #FF5733 Becomes Orange

Hex color codes look cryptic but follow simple rules. Here is how to read any color code at a glance.

May 6, 2026 Tech

CIDR Notation: Why Networking Switched from Classful to /24

Networking used to use "Class A, B, C" rigid subnets. CIDR replaced this with the /N notation in the 1990s and never looked back.

May 5, 2026 Tech

How to Show Full Decimal Numbers Without Scientific Notation

Most calculators switch to scientific notation (1.23E+10) when numbers get too big or too small. Here is how to display the full decimal form on common calculators.

May 4, 2026 Tech

How Strong Is Your Password? Length vs Complexity Math

A long simple password beats a short complex one. Here is the math, with rules for actually-strong passwords.

May 2, 2026 Tech

IP Subnetting Explained: From /24 to /16 to /8

CIDR notation like /24 and /16 is everywhere in networking. Here is what each prefix means in plain English.

May 1, 2026 Tech

Why You Should Use a Password Manager (and Which One)

Password managers are the single most-effective security upgrade most people can make. Here is why, and which one to pick.

Apr 30, 2026 Tech

KiB, MiB, GiB: The Binary Units Most People Don't Know

KiB, MiB, GiB are the IEC standard names for binary data units. Most people use MB or GB instead — but the distinction matters.

Apr 29, 2026 Tech

Why Your 1TB Hard Drive Shows Only 931 GB

You bought a 1 terabyte drive but Windows says it's 931 GB. Same drive, different math. Here is why.

Apr 28, 2026