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Calculate mortgages, loans, EMI, tax, investments, and more with precision. Make informed financial decisions.
Explore Financial Tools →Track BMI, calories, body fat percentage, pregnancy, ovulation, and maintain optimal wellness.
View Health Tools →GST calculator, salary calculator, profit margin, ROI, and essential business calculation tools.
Access Business Tools →GPA calculator, percentage calculator, grade calculator, and academic performance tracking tools.
Check Education Tools →Physics calculators, chemistry tools, engineering calculations, and scientific computation utilities.
Discover Science Tools →Age calculator, date difference, time zone converter, meeting planner, and scheduling utilities.
Explore Time Tools →Quick access to our most frequently used calculation tools
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Comprehensive guide to making the most of our free online calculator tools
CalculatIt is the world's most comprehensive free online calculator platform, offering over 100 specialized calculation tools designed to simplify complex mathematical, financial, health, and business computations. Founded by Mr. Dhananjoy Ghosh in 2025, our mission is to provide accessible, accurate, and user-friendly calculators to everyone, everywhere.
Whether you're a student calculating your GPA, a homebuyer estimating mortgage payments, a fitness enthusiast tracking calories, or a business owner managing finances, CalculatIt has the perfect calculator for your needs. Our platform serves over 5 million users monthly across the United States, United Kingdom, Canada, Australia, and 150+ countries worldwide.
Financial planning can be overwhelming, but our specialized financial calculators make complex calculations simple and accessible. Whether you're planning a major purchase, managing debt, or investing for the future, our tools provide the clarity you need to make informed decisions.
Our mortgage calculator helps you understand your home loan costs in detail. Simply enter your loan amount, interest rate, loan term, and down payment to see:
The EMI calculator is essential for anyone taking personal loans, auto loans, or any installment-based financing. It calculates your Equated Monthly Installment (EMI) using the formula: EMI = [P x R x (1+R)^N] / [(1+R)^N-1], where P is principal, R is monthly interest rate, and N is tenure in months.
Navigate tax season confidently with our income tax calculator, GST calculator, and sales tax calculator. These tools help you estimate tax liabilities, plan deductions, and ensure compliance with current tax laws in the US, UK, and other regions.
Taking control of your health starts with understanding your body's metrics. Our health and fitness calculators provide scientifically-backed insights to help you achieve your wellness goals.
The BMI calculator (Body Mass Index) is one of the most widely used health screening tools. It calculates your body mass relative to height using the formula: BMI = weight(kg) / height(m)². Our calculator provides:
BMI Categories: Underweight (below 18.5), Normal (18.5-24.9), Overweight (25-29.9), Obese (30+)
Our calorie calculator determines your daily caloric needs based on age, gender, weight, height, and activity level. It uses the Mifflin-St Jeor equation, recognized as one of the most accurate predictors of Basal Metabolic Rate (BMR).
The ovulation calculator helps women track their fertile window for conception planning. By inputting your last menstrual period date and cycle length, it predicts ovulation day and optimal conception days.
Running a business requires precise financial calculations. Our business calculator suite provides professional-grade tools for accounting, payroll, pricing, and financial analysis.
The UK salary calculator and PAYE tax calculator help employers and employees understand take-home pay after deductions. Calculate National Insurance, income tax, pension contributions, and net salary instantly.
Our GST calculator simplifies Goods and Services Tax calculations for businesses. Whether you need to add GST to a price or extract GST from the total, our tool handles both scenarios with precision.
Students, teachers, and educational institutions rely on our academic calculators for grade tracking, GPA calculation, and performance analysis.
The GPA calculator helps students track academic performance. It supports both weighted and unweighted GPA calculations, multiple grading scales (4.0, 5.0), and semester-wise GPA tracking.
Our versatile percentage calculator handles all percentage-related calculations: finding what percentage one number is of another, calculating percentage increase/decrease, adding or subtracting percentages, and more.
From physics to chemistry, our scientific calculators support complex computations with precision and ease.
The scientific calculator offers advanced mathematical functions including trigonometry, logarithms, exponentials, factorials, and statistical operations. Perfect for students, engineers, and researchers.
Everything you need to know about using CalculatIt
CalculatIt offers over 100 free online calculators across multiple categories including Financial Calculators (mortgage, loan EMI, tax, investment), Health & Fitness Calculators (BMI, calorie, body fat percentage), Business Calculators (GST, salary, profit margin), Educational Tools (GPA, percentage, scientific calculator), and Lifestyle Calculators (age, date, time converter). All calculators are mobile-friendly and provide instant accurate results.
Yes, all 100+ calculators on CalculatIt are completely free to use with no hidden charges, registration requirements, or subscription fees. You can access any calculator unlimited times from any device - desktop, tablet, or mobile - without any restrictions. We believe in providing accessible tools for everyone, which is why we'll always remain free.
All calculators on CalculatIt use industry-standard formulas and algorithms verified by financial, medical, and mathematical experts. Our calculators are regularly updated to ensure accuracy and compliance with current standards. For financial calculators, we use official tax rates and lending formulas. For health calculators, we follow WHO and CDC guidelines. Our accuracy rate exceeds 99.9%, making our tools suitable for professional and personal use.
Absolutely! All CalculatIt calculators are fully responsive and mobile-optimized. They work seamlessly on smartphones (iOS and Android), tablets, and all screen sizes. The interface automatically adjusts for optimal user experience on any device, ensuring fast loading and easy calculation on-the-go. Our mobile-first design philosophy ensures you get the same powerful features on mobile as you would on desktop.
No account creation required! All calculators on CalculatIt are instantly accessible without any registration, login, or personal information. Simply visit the calculator you need, enter your values, and get immediate results. Your privacy is our priority - we don't store your calculation data or require any email addresses.
CalculatIt stands out with its comprehensive collection of 100+ specialized calculators, lightning-fast performance, mobile-first design, minimal ad interference, detailed explanations with each result, step-by-step calculation breakdowns, privacy-focused approach (no data storage), regular updates with latest formulas, and expert-verified accuracy. We focus on providing professional-grade calculation tools that are simple enough for everyone to use. Our commitment to user experience and accuracy has made us a trusted choice for over 5 million monthly users.
BMI (Body Mass Index) is calculated using the formula: BMI = weight (kg) / height (m)². Use our BMI calculator to get instant results. BMI categories are: Underweight (below 18.5), Normal weight (18.5-24.9), Overweight (25-29.9), and Obese (30 and above). While BMI is a useful screening tool, it doesn't directly measure body fat percentage and may not be accurate for athletes with high muscle mass.
Use our mortgage calculator by entering: (1) Home price or loan amount, (2) Down payment percentage, (3) Interest rate, (4) Loan term (typically 15 or 30 years). The calculator instantly shows your monthly payment, total interest paid, and complete amortization schedule. It also factors in PMI, property taxes, and homeowners insurance if applicable.
Yes! Our income tax calculator, GST calculator, and other tax tools are regularly updated to reflect the latest tax brackets, rates, and regulations for 2026. We monitor tax law changes in the US, UK, and other major countries to ensure our calculators provide current and accurate tax estimates.
Yes! Most calculators include options to print results or save them as PDF. You can also easily share results via email or social media. The URLs are shareable, so you can bookmark specific calculators or send links to friends and colleagues.
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