QuickToolHub guides

Short practical explanations for using everyday digital tools. These guides are a starting point; we plan to add more detailed examples and tutorials over time.

1. How to count words and characters

Words, characters, and spaces

A word count usually treats groups of characters separated by spaces as words. Character count includes letters, numbers, punctuation, and spaces. A “characters without spaces” count removes whitespace before counting. Different writing apps can handle hyphenated words and sentence punctuation differently, so use the same tool consistently when following a strict assignment or platform limit.

Example: “Hello, world!” contains two words and thirteen characters including the comma, space, and exclamation mark.

2. How to calculate a percentage

Basic percentage formula

To find a percentage of a number, convert the percentage to a decimal and multiply it by the number. For example, 15% of 200 is 0.15 × 200 = 30. To find what percent one number is of another, divide the part by the whole and multiply by 100. For example, 30 ÷ 120 × 100 = 25%.

3. How to calculate age from dates

Compare the two dates

Age is calculated by comparing a date of birth with a second date. Full years are counted first, then completed months and remaining days. Make sure the date of birth is not later than the date used for the calculation. Age calculators can differ slightly in how they handle local dates and leap-day birthdays.

4. How to change text case

Choose the right text style

Uppercase makes every letter a capital; lowercase makes every letter small. Title case capitalizes the beginning of words, while sentence case capitalizes the first letter of a sentence. Automated conversion may not preserve every proper noun or language-specific rule, so proofread the converted text before publishing it.

5. How image compression works

Balance file size and image quality

Image compression reduces file size by changing image encoding and, for lossy formats such as JPEG, discarding some visual information. Lower quality settings often make smaller files but can add visible artifacts. Keep an original copy of important images and inspect the compressed result before using it. This site's current compressor creates a JPEG file, so transparent backgrounds are filled with white.

Use the free tools to try these examples. We intend to expand this page with more original, tested tutorials and illustrations.