Everyday Calculators
Quick, practical tools for calculations you may need at home, work, while shopping or when planning.
Percentage Calculator
Calculate percentages quickly with clear formulas and results.
Open calculator →EverydayRatio Calculator
Simplify ratios, calculate equivalent ratios, scale proportions and compare ratio shares.
Open calculator →EverydayAverage Calculator
Calculate mean, median, mode, range, sum, count and standard deviation from a list of numbers.
Open calculator →EverydayUnit Price Calculator
Compare two products by price, quantity, package count and compatible measurement units to find the better value.
Open calculator →EverydayRecipe Scaling Calculator
Scale an entire recipe for more or fewer servings with decimal, fraction and mixed-fraction ingredient amounts.
Open calculator →EverydayAge Calculator
Calculate your exact age from your date of birth.
Open calculator →EverydayTip Calculator
Calculate tip, total bill and cost per person.
Open calculator →EverydayDate Calculator
Add or subtract days from any calendar date.
Open calculator →EverydayDays Between Dates Calculator
Calculate the exact number of calendar days between two dates.
Open calculator →EverydayVolume Calculator
Calculate rectangular-prism and cylinder volume.
Open calculator →Helpful Guides
Go beyond the calculator with practical explanations, formulas and worked examples.
How to Calculate Percentage: Formulas and Examples
Learn how to calculate percentages, percentage change, percentage increase and decrease with simple formulas and examples.
EverydayHow to Calculate Age from Date of Birth
Learn how age is calculated from a date of birth, why birthdays matter, and how to determine years, months and days accurately.
EverydayHow to Calculate the Difference Between Two Dates
Learn how to calculate days between dates and understand calendar differences involving months, years and leap years.
Everyday calculations made easier
These everyday calculators cover common percentage, date, age, tip and volume questions. Each tool is designed to give a quick result while also showing the method or assumptions behind the calculation.
Choosing the right calculator
Choose the calculator that matches the quantity you are trying to find. Percentage tools are useful for relative change and proportions, date and age tools work with calendar values, and the volume tool handles simple three-dimensional shapes.
- Use the Percentage Calculator for discounts, increases, decreases and part-to-whole comparisons.
- Use the Age or Date Calculator when the exact calendar date matters.
- Use the Tip Calculator for gratuity and bill splitting, and Volume Calculator for basic geometric volume.