TOPIC GUIDE
Everyday Life
Percentage, time, sizing, consumption and practical decision tools.
TV Viewing Distance Calculator
How far should I sit from my TV?
→Days Between Dates Calculator
How many days are there between two dates?
→Age Calculator
Exactly how old am I?
→Percentage Calculator
What is a percentage, percentage change or ratio percentage?
→Discount Calculator
What is the final price and real savings after one or two discounts?
→Recipe Scaling Calculator
How much should I scale a recipe for a different number of servings?
→TOPIC GUIDE
How to use these tools
Everyday tools aim for fast, understandable answers while keeping units, assumptions and rounding visible.
- Keeping inputs in a consistent unit and date system
- How rounding changes the required precision
- Assumptions and constants used in approximate conversions
- The purpose for which the result will be used