Math Tools
Quick calculators for everyday math — percentages, unit conversions, and more. Get instant answers with formulas shown so you can understand the calculation, not just the result.
Discount Percentage Calculator for Shopping
Quickly calculate the final price after a percentage discount during sales.
Profit Margin Calculator for Small Business
Determine your gross profit margin and markup percentage for e-commerce products.
Percentage Calculator for Tip Amount
Instantly calculate 15%, 18%, 20%, or custom tip percentages on your restaurant bill. Works offline.
GPA Calculator for Indian Universities
Convert Indian university percentage scores to GPA on a 10-point or 4-point scale with CGPA estimation.
Date Difference Calculator for Visa Application
Calculate exact days between dates for visa stay duration, 180-day rules, and entry/exit compliance.
Percentage Calculator
Calculate percentages quickly: "What is X% of Y", "X is what % of Y", and percentage change.
Age Calculator
Calculate your exact age in years, months, and days, plus countdown to your next birthday.
Unit Converter
All-in-one unit converter for Length, Weight, Temperature, and Digital Data Storage units.
BMI Calculator
Calculate your Body Mass Index (BMI) with WHO healthy range visual scale and metric/imperial switcher.
Tip & Split Bill Calculator
Calculate tips and split bills across multiple people instantly with preset tip percentages.
Date Difference Calculator
Calculate the exact number of days, weeks, months, and years between any two dates.
GPA Calculator
Calculate your cumulative GPA on the 4.0 scale. Add courses with grades and credit hours.
Life in Weeks
Visualize the weeks you have lived within a lifespan assumption you control.