Guides & Tutorials

31 October, 2026 • Guides & Tutorials

Learn how to create strong, unique passwords and passphrases, avoid common mistakes, and use free tools to generate and test password strength.

31 October, 2026 • Guides & Tutorials

Learn to read Roman numerals in minutes: the 7 symbols, add and subtract rules, how to read years like MMXXVI, and a 1–100 chart.

31 October, 2026 • Guides & Tutorials

Learn what a Unix timestamp (epoch time) is and how to convert it to a date in Excel, JavaScript, PHP and Python, with copy-paste examples.

31 October, 2026 • Guides & Tutorials

How long does a 1 GB download take at 10, 50 or 100 Mbps? See a download time chart and learn how to calculate any file’s download time.

31 October, 2026 • Guides & Tutorials

Is 1 GB 1000 MB or 1024 MB? Learn the difference between decimal (GB) and binary (GiB) units and why a 1 TB drive shows about 931 GB in Windows.

31 October, 2026 • Guides & Tutorials

Mbps measures internet speed; MB measures file size. Learn the difference between megabits and megabytes and how to calculate real download speed.

31 October, 2026 • Guides & Tutorials

Understand mpg and L/100km, convert between US mpg, UK mpg and L/100km, and see a fuel economy chart to compare cars from any country.

31 October, 2026 • Guides & Tutorials

1 mile = 1.609 km. See how far 5K, 10K, half marathon and marathon are in miles, plus a km to miles chart and pace tips for runners.

31 October, 2026 • Guides & Tutorials

Convert your height from centimeters to feet and inches with this easy chart from 140 cm to 200 cm, plus the formula and quick examples.

31 October, 2026 • Guides & Tutorials

Convert square meters to square feet for flats, rooms and offices. 1 m² = 10.764 sq ft. Includes a property size chart and easy calculation tips.

31 October, 2026 • Guides & Tutorials

How big is an acre? 1 acre = 0.4047 hectares = 4,047 m² = 43,560 sq ft. Compare it with football fields and convert land sizes easily.

31 October, 2026 • Guides & Tutorials

There are about 4.23 US cups in a liter. See conversion charts for liters to cups and cups to ml, plus the difference between US and metric cups.

31 October, 2026 • Guides & Tutorials

There are 16 tablespoons in a US cup. Use this kitchen chart to convert cups, tablespoons, teaspoons and milliliters quickly and accurately.

31 October, 2026 • Guides & Tutorials

Convert oven temperatures between Celsius, Fahrenheit, fan oven and gas mark with this printable chart. Perfect for following recipes from any country.

31 October, 2026 • Guides & Tutorials

Body temperature conversion chart from Celsius to Fahrenheit, with normal ranges and fever levels for adults and children. Includes the easy formula.

31 October, 2026 • Guides & Tutorials

Convert kg to stone and pounds easily. Includes a body weight chart from 40 kg to 120 kg, the formula, and quick mental-math tips.

31 October, 2026 • Guides & Tutorials

Slow WordPress site? Learn the right image sizes, formats and free compression steps to make WordPress pages load faster and pass Core Web Vitals.

31 October, 2026 • Guides & Tutorials

Learn how to convert an image to Base64 and embed it directly in HTML, CSS or email templates. Includes code examples and when not to use Base64.

31 October, 2026 • Guides & Tutorials

What is a HEIC file and why does your iPhone use it? Learn how to open HEIC files on Windows, Android and online, and how to convert them to JPG.

31 October, 2026 • Guides & Tutorials

WebP or AVIF? Compare file size, quality, browser support and encoding speed to choose the best next-gen image format for a fast website.

31 October, 2026 • Guides & Tutorials

JPG or PNG? Learn the real differences in quality, file size and transparency, and exactly when to use each format for websites, print and social media.

31 October, 2026 • Guides & Tutorials

Create a favicon for your website from a PNG logo in minutes. Learn favicon sizes, convert PNG to ICO for free and add it to WordPress or HTML.

31 October, 2026 • Guides & Tutorials

Learn how to reduce image file size without losing visible quality: resize, compress and pick the right format. Free tools and step-by-step tips.

31 October, 2026 • Guides & Tutorials

Saved an image and got a .webp file? Learn how to convert WebP to JPG on Windows, Mac or online in seconds, plus why websites use WebP.

31 October, 2026 • Guides & Tutorials

Can’t open iPhone HEIC photos on Windows? Learn 3 free ways to convert HEIC to JPG on Windows 10 and 11, including an online converter that needs no software.