Everyday
Discounts, tips, and daily life calculations
Everyday Calculators
Simplify your daily decisions with our free everyday calculators. Whether you're shopping for the best deal, figuring out how much you'll actually save, calculating tax on a purchase, working out your exact age down to the day, measuring the precise time between two moments, or converting cooking measurements for a recipe, these tools give you quick, reliable answers without the mental math.
Our everyday calculator collection covers discounts, VAT and sales tax, percentages, age calculations, date durations, and kitchen measurement conversions — and we're always building more tools to help with the practical calculations that come up in daily life.
Shopping & Discounts
The discount calculator instantly shows you the final price after any percentage discount. Enter the original price and discount percentage to see exactly how much you save and what you'll actually pay.
See a price tag that says "was $80, now $60" and want to know the actual percentage off? The discount percentage calculator does the reverse — enter both prices and instantly find out the discount rate. Perfect for comparing deals across different stores.
For stacked promotions, the multiple discounts calculator handles successive discounts in one go.
VAT & Sales Tax Calculator
The VAT and sales tax calculator lets you add or remove tax from any price in seconds. Enter a price and a tax rate, and instantly see the tax amount and the total price including tax — or work backwards from a tax-inclusive price to find the net amount before tax.
Useful for shoppers who want to know the tax component of a purchase, freelancers who need to quote prices with or without VAT, and small business owners checking invoice figures. The calculator works with any tax rate, from standard VAT rates in Europe to state and local sales tax rates in the US.
Age Calculator
The age calculator tells you your exact age in years, months, and days from any date of birth to any target date. It also shows your total days lived, weeks, hours, minutes, and the number of days remaining until your next birthday.
This is useful for more than curiosity: parents track infant age in weeks for pediatric checkups, and anyone needing to verify age eligibility for voting, driving, or benefits can check an exact count to the day rather than estimating.
Date Duration Calculator
The date duration calculator measures the exact time between any two datetime points — down to years, months, days, hours, minutes, and seconds. Both fields include a "Now" button so you can instantly set either endpoint to the current moment, and the calculator automatically swaps the dates if the end is earlier than the start.
Use it to find how long until a deadline, how many days have passed since an event, or the precise gap between two timestamps across different time zones.
Shoe Size Converter
The shoe size converter translates between 8 international sizing systems — US, UK, EU, JP (Japan), KR (Korea), BR (Brazil), MX (Mexico), and AU (Australia). Select men's, women's, or kids' sizes and instantly see the equivalent across all systems.
Enter a known size or your foot length in centimeters, and the converter shows results for every other system. Dedicated pair converters for US-EU, US-UK, and EU-UK are also available for quick lookups between specific systems. A complete reference table and foot measurement guide are included to help you find the perfect fit when shopping internationally.
Cooking Measurement Converters
Our cooking converters make it easy to follow any recipe regardless of the units used. The cooking converter handles the most common kitchen unit conversions in one place — cups, tablespoons, teaspoons, milliliters, fluid ounces, and more, with ingredient-aware weight conversions for flour, sugar, butter, rice, and other staples.
Need to convert cups to grams for a specific ingredient? The cups-to-grams converter accounts for ingredient density so you get accurate weight measurements, not just a generic approximation. Prefer metric for liquids? The tablespoons-to-ml converter gives you the exact milliliter equivalent instantly. And when a recipe calls for ounces but your scale reads grams, the oz-to-grams converter handles it with one click.
These tools are especially useful when adapting US recipes for metric kitchens, scaling a recipe up or down, or baking where precision makes a real difference to the final result.
Your Everyday Math Toolkit
Our everyday calculator collection is designed to save you time on the practical calculations that come up in daily life. Each tool gives you instant, accurate results so you can make quick decisions with confidence.
Have a suggestion for a calculator you'd find useful? We're always looking to add tools that make daily life a little easier.
Frequently Asked Questions
Enter the original price and the discount percentage. The calculator instantly shows you the discount amount (how much you save) and the final price (what you actually pay). It uses the standard formula: final price = original price × (1 - discount / 100).
Use the discount percentage calculator. Enter the original price and the final (sale) price, and it instantly calculates the discount percentage and the amount saved. The formula is: discount % = ((original - final) / original) × 100.
Yes, use the multiple discounts calculator to apply successive discounts in one go. For stacked discounts (like 20% off plus an extra 10%), it calculates the final price and the effective total discount.
Enter a price and the applicable VAT or sales tax rate. The calculator shows you the tax amount and the total price including tax. You can also reverse the calculation — enter a tax-inclusive price to extract the net amount and the tax component separately.
Use the age calculator. Enter your date of birth and the target date (or leave it as today). The calculator uses the long subtraction method to give you your precise age in years, months, and days, plus total days lived and days until your next birthday.
Use the date duration calculator. Select a start datetime and an end datetime — use the "Now" button on either field to set it to the current moment. The result shows the exact duration in years, months, days, hours, minutes, and seconds. If you enter the end before the start, the calculator auto-swaps them.
Use the cups-to-grams converter. Select the ingredient (flour, sugar, butter, rice, etc.) and enter the number of cups. The converter applies the correct density for that ingredient so the gram weight is accurate, not just an average approximation. This is important for baking where small weight differences affect the result.
Yes, we regularly add new calculators to this category. Check back often to discover new tools for your everyday calculations.
Yes, all our calculators are completely free with no sign-up required. Just open the tool you need, enter your numbers, and get instant results.