Math
16 tools · all browser-based
Calculators for everyday numbers — percentages, dates, health, money and more.
Quick, accurate calculators that show their working: percentages and percentage change, dates and ages, BMI and calorie needs, GPA, salary and tip splitting, fractions, ETA and elapsed time, and a scientific expression evaluator.
All calculations run in your browser and update as you type — no page reloads, no ads between you and the answer.
Most popular math
Calculators14
ETA Calculator
Calculate estimated time of arrival
Math Evaluator
Evaluate complex math expressions
Calculator
Simple and scientific calculator
Percentage Calculator
Calculate percentages easily
Age Calculator
Calculate your exact age in years, months, and days
BMI Calculator
Calculate your Body Mass Index and understand your health status
Calorie Calculator
Estimate your daily calorie needs and macronutrient breakdown
Date Calculator
Calculate distance between dates or project future deadlines
Fraction Calculator
Perform arithmetic operations on fractions with simplified results
GPA Calculator
Track your grades and see your weighted or unweighted GPA
Ideal Weight Calculator
Estimate your healthy weight range based on WHO standards
Salary Calculator
Calculate and convert your salary across different pay periods
Tip Calculator
Split bills and calculate tips instantly for dining and services
Zakat Calculator
Calculate your obligatory charity based on your current wealth
Date & Time1
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Frequently asked questions
- Can I trust these calculators for important decisions?
- They use standard formulas and are accurate for everyday use. For medical, legal or tax decisions, treat the results as a starting point and confirm with a professional.