Blog — Tech

Guides, worked examples and explainers.

Tech

How Much Internet Bandwidth Do I Actually Need?

Internet plans range from 25 Mbps to 1 Gbps. Here is how to figure out what you actually need based on your household usage.

May 14, 2026
Tech

Best Online Calculators Without Ads

Most online calculators have aggressive popup, banner, and tracking ads. Here are the cleanest, fastest options that just compute the answer.

May 14, 2026
Tech

How Big Is a 4K Video File? Estimating Media Storage

4K video sizes can vary 10× depending on bitrate. Here are realistic file sizes for streaming, recording, and editing 4K content.

May 13, 2026
Tech

Unix Timestamps Explained: What "Seconds Since 1970" Really Means

Unix timestamps are the universal time format in programming. Here is what they are, why they start in 1970, and how they work.

May 12, 2026
Tech

When to Use Base64 (and When to Just Send the File)

Base64 is great for some use cases and terrible for others. Here is the practical guide to when to use it and when not to.

May 12, 2026
Tech

Base64 Encoding: What It Is, Why It Exists, and When to Use It

Base64 encoding turns binary data into text-safe strings. Here is what it does, when you actually need it, and the 33% size penalty.

May 11, 2026
Tech

RGB vs CMYK: Why Web Colors Don't Match Print

Web design uses RGB. Print uses CMYK. The two color models work differently, and the gap explains why your printed posters look duller than the screen preview.

May 11, 2026
Tech

The Y2038 Problem: When Computer Time Will Wrap Around

On January 19, 2038, 32-bit Unix timestamps will overflow. Most systems are already fixed — but the long tail of legacy systems remains.

May 10, 2026
Tech

Binary Numbers for Beginners: How Computers Actually Count

Computers use binary because transistors have two states. Here is what that means for how they actually do arithmetic.

May 9, 2026
Tech

Mbps vs MBps: Why Your Internet Speed Lies

Your ISP says 100 Mbps. Your download manager shows 12 MB/s. Both are right. Here is the difference between bits and bytes.

May 8, 2026
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