Percentage Calculator
Find X% of a number, what percent one number is of another, and percentage increase or decrease.
Age Calculator
Enter your date of birth to get your exact age in years, months, and days.
Date Difference Calculator
Count the days between any two dates — plan trips, deadlines, and countdowns.
Salary Calculator
Convert hourly pay to annual, monthly, weekly, and daily salary in seconds.
Unit Converter
Convert length, weight, temperature, and volume units instantly and accurately.
Why use EverydayKit?
Instant answers, zero friction
Every tool works right in your browser. Type a number, get the answer — no accounts, no downloads, no waiting.
Accurate math you can trust
Each calculator is tested against known values. Date tools use proper calendar arithmetic, and unit conversions use standard international factors.
Works on any device
The whole site is designed mobile-first, so every tool feels natural on your phone, tablet, or computer.
Frequently asked questions
Is EverydayKit really free?
Yes. Every tool on EverydayKit is completely free to use, with no account, subscription, or hidden charges.
Do I need to create an account?
No. All calculations happen instantly in your browser — there is nothing to sign up for.
Does EverydayKit work on mobile?
Yes. The site is designed mobile-first and every tool works smoothly on phones, tablets, and computers.
Are the results accurate?
Yes. Our calculators use standard formulas and are tested against known values. Date calculations use proper calendar arithmetic.