Everyday Guides
Everything you need to know about everyday concepts.
How to Calculate a Discount: Step-by-Step Guide
Calculating a discount requires converting the discount percentage into a decimal, multiplying it by the original price to find your savings, and subtracting that from the total.
Read guide →How Sales Tax is Calculated
Understand the formula for calculating sales tax and how to estimate the final checkout price of your purchases.
Read guide →How to Calculate Age from a Date of Birth
Calculating age manually involves subtracting the birth year from the current year, then adjusting the result if the person's birthday hasn't happened yet this year.
Read guide →How to Calculate Time Duration
Calculating time duration requires converting your times to a 24-hour clock, subtracting the start time from the end time, and borrowing 60 minutes if the end minutes are smaller.
Read guide →How to Estimate Fuel Costs for a Road Trip
To estimate fuel cost, divide your total trip distance by your vehicle's MPG, then multiply that number by the local price per gallon of gas.
Read guide →How Clothing Sizing Works
Learn the history of clothing sizing, why sizes vary so much between brands, and how vanity sizing impacts the fit of modern apparel.
Read guide →How to Measure Yourself for Clothes
A step-by-step guide to taking accurate body measurements for buying clothes online or visiting a tailor.
Read guide →International Clothing Conversion Tips
Tips and tricks for converting US sizes to UK, EU, and Asian sizing standards when shopping internationally.
Read guide →