🧮 The math you need on any given day.
Percentages, fractions, dates, ages, unit conversions — quick, no-frills calculators for everyday questions.
Percentage Calculator
X% of Y, or what % one number is of another.
% Change Calculator
Percentage increase or decrease between two numbers.
% Difference Calculator
The symmetric difference between two numbers — no 'before' assumed.
Discount Calculator
What a % off actually saves you, and the final price.
Markup Calculator
Cost → selling price, or find the markup % between them.
Sales Tax Calculator
Price + tax rate → what you actually pay.
Fraction Calculator
Add, subtract, multiply, or divide fractions — simplified.
Ratio Calculator
Simplify a ratio, or solve for a missing term.
Average Calculator
Mean, median, mode, and range from a list of numbers.
Age Calculator
Exact age in years, months, and days from a birthdate.
Date Calculator
Add or subtract days from a date, or find the difference between two.
Time Duration Calculator
How much time between two clock times, including overnight.
Hours Calculator
Add up shift times into total hours worked.
Unit Converter
Length, weight, volume, speed, and temperature, all in one place.