Everyday calculators that get straight to the answer.
Fast, reliable, mobile-first tools for percentages, dates, money, time, and unit conversions.
Popular Calculators
Everyday math, age, date differences, and shopping tools.
Percentage Calculator
Calculate percentages, percentage change, and reverse percentages.
Age Calculator
Find exact chronological age in years, months, weeks, and days.
Days Between Dates Calculator
Count total elapsed days, weeks, and weekdays between two calendar dates.
Hours Calculator
Calculate elapsed hours and minutes between clock times across midnight.
Discount Calculator
Calculate sale savings, stacked percentage discounts, and final prices.
Tip Calculator
Calculate restaurant tips, total bill with tip, and split per person.
Average Calculator
Calculate arithmetic mean, median, sum, and count from numbers.
Time Zone Converter
Convert times across world timezones with automatic daylight saving.
Money & Business
Margins, markups, taxes, commissions, and salaries.
Profit Margin Calculator
Calculate gross profit, margin percentage, and target selling price.
Markup Calculator
Find markup amount, selling price, and equivalent gross margin.
Break-even Calculator
Determine break-even units and revenue from fixed and variable costs.
VAT Calculator
Add VAT to net amount or extract VAT from gross total.
Time & Date
Timezones, timestamps, business days, and hours.
Time Zone Converter
Convert times across world timezones with automatic daylight saving.
Unix Timestamp Converter
Convert Unix epoch timestamps in seconds or milliseconds to human date/time.
Business Days Calculator
Count working business days between dates excluding weekends and holidays.
Working Hours Calculator
Calculate billable working hours across date ranges accounting for shift times and breaks.
Unit Converters
Metric, imperial, data storage, and physical units.
Length Converter
Convert meters, feet, inches, centimeters, kilometers, and miles.
Weight / Mass Converter
Convert kilograms, pounds, ounces, grams, stones, and metric tonnes.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin with absolute zero validation.
Area Converter
Convert square meters, square feet, acres, hectares, and square kilometers.
Looking for a specific calculation?
Explore our complete directory of 31 focused, verified calculators across everyday math, finance, time, and conversion.
Built on Precision & Transparency
EverydayNumbers is dedicated to fast, accurate, client-side calculations with zero data harvesting and strict editorial integrity.
About Us
Learn about our tool-first mission, decimal-safe arithmetic standards, publishing principles, and the engineering team behind EverydayNumbers.
Frequently Asked Questions
Find clear answers to questions on formula sources, zero-telemetry privacy, offline execution, and our non-intrusive AdSense policy.
Contact Us
Found a calculation discrepancy, want to suggest a new tool, or have a partnership inquiry? Fill out our form or email us directly.