57+ calculators for finance, creator economy, AI costs, business metrics, and more. Instant results, no sign-up required.
Calculate your SIP returns, plan goal-based investments, and compare regular vs step-up SIP โ all with interactive charts and detailed year-wise analysis.
Free old vs new tax regime calculator online โ compare income tax under both regimes side-by-side and find which regime is best for tax saving in FY 2025-26.
Calculate your loan EMI, total interest, and repayment schedule instantly โ for home loans, car loans, and personal loans.
Calculate GST amount, CGST, SGST, and total price instantly โ add or remove GST from any amount for all GST slabs.
Calculate Fixed Deposit maturity amount, total interest earned, and effective annual yield for any FD tenure and interest rate.
Calculate compound interest on any investment or loan โ see how your money grows with the power of compounding over time.
Calculate simple interest on any principal amount โ find total interest earned and final amount with the SI formula instantly.
Calculate PPF maturity amount, total interest earned, and year-wise growth for any annual deposit at 7.1% โ India's safest long-term investment.
Convert your CTC to monthly in-hand salary โ calculate take-home pay after PF, gratuity, and professional tax deductions.
Calculate the sale price, savings amount, and final price after any percentage discount โ instantly for any original price.
Calculate the future equivalent value of money and how inflation erodes purchasing power over time.
Simulate your YouTube earnings based on views, niche, RPM, and monetization level โ instantly.
Find out how much Instagram pays in India โ income by 1K, 10K, 100K, 500K & 1M followers with sponsored post rates, affiliate earnings & monthly income calculator.
Estimate your OpenAI API costs for GPT-4o, GPT-4, GPT-3.5, and more.
Find your break-even point โ when revenue covers all costs. Predict time to profitability and get actionable insights.
Free salary projection calculator โ simulate your salary progression over 15 years based on increments, job switches, promotions, career strategy, and side income growth.
Predict your college admission chances based on exam score, rank, and category.
Predict how your property value will grow over time based on appreciation rates.
Compare the total cost of renting vs buying a home over time to make the right decision.
Find out how much home you can afford based on your income and financial situation.
Calculate rental yield and ROI on investment properties to make informed investment decisions.
Predict your YouTube subscriber growth over time based on current momentum.
Find out when you can retire early based on savings, expenses, and investment returns.
Predict how long it will take to reach your target weight based on calorie deficit.
Discover your genetic muscle-building potential and realistic timeline for natural gains.
Calculate your Body Mass Index and understand your weight category with health recommendations.
Calculate your optimal calorie deficit and daily intake for sustainable weight loss goals.
Calculate your Total Daily Energy Expenditure (TDEE) โ find exactly how many calories you need per day to maintain, lose, or gain weight.
Find your ideal body weight using the Robinson formula based on height and gender.
Estimate your body fat percentage using the US Navy formula โ no calipers needed.
Calculate your pregnancy due date from your last menstrual period (LMP).
A fun predictor that estimates your marriage timeline based on life factors. For entertainment only!
Estimate your trimester changes, anatomy scan window, full-term dates, and hospital bag ready-by date from your due date, gestational age, or last menstrual period.
Estimate your ovulation date, fertile window, next expected period, and cycle timing โ privacy-first, no data saved, runs entirely in your browser.
Predict your Shopify store revenue based on traffic, conversion rate, and average order value.
Calculate percentages instantly โ find X% of Y, what percent X is of Y, or percentage change between two numbers.
Calculate your exact age in years, months, and days โ and find out how many days until your next birthday.
Find the Highest Common Factor (HCF) and LCM of any two numbers instantly โ with the Euclidean algorithm explained step by step.
Find the Least Common Multiple (LCM) of any two numbers instantly โ essential for adding fractions and solving number theory problems.
Solve any quadratic equation axยฒ + bx + c = 0 instantly โ find both roots, discriminant, and nature of roots using the quadratic formula.
Calculate the missing side of a right triangle using the Pythagorean theorem โ find hypotenuse or legs instantly.
Calculate the area, circumference, and diameter of any circle from its radius โ instantly, with ฯ = 3.14159 or 22/7.
Calculate mean, standard deviation, and variance for any dataset โ supports both population and sample standard deviation.
Calculate the exact number of days, weeks, and months between any two dates โ instantly and accurately.
Calculate the square root, cube root, and nth root of any number instantly โ with step-by-step results.
Add, subtract, multiply, and divide fractions โ get simplified results with decimal equivalents instantly.
Calculate the area and perimeter of any triangle โ using base & height or Heron's formula for three sides.
Calculate mean, median, range, min, and max of any set of numbers โ just enter comma-separated values.
Calculate any base raised to any exponent (aโฟ) โ get the result with scientific notation for large numbers.
Calculate n! (n factorial) for any non-negative integer โ with the log of n! for handling large numbers.
Calculate nPr (permutations) and nCr (combinations) instantly โ for any n and r values.
Solve ratios and proportions โ find the missing value in a:b = c:d and simplify any ratio instantly.
Calculate slope, y-intercept, and distance between two points on a coordinate plane โ instantly.
Check if any number is prime, find its smallest prime factor, and count its total number of factors.
Calculate tip amount, total bill, and per-person split in seconds.
Convert temperature between Celsius, Fahrenheit, and Kelvin instantly.
Calculate speed, distance, or time โ enter any two values to find the third.
Finance calculators are essential tools for anyone looking to make smarter money decisions. Whether you're planning forโฆ
The creator economy has exploded. With over 50 million people worldwide identifying as content creators, and platformsโฆ
Artificial Intelligence is transforming every industry, and with that transformation comes real costs. Whether you're aโฆ
Running a successful business requires making decisions based on numbers, not gut feelings. Whether you're a first-timeโฆ
Career and salary predictors help working professionals forecast their financial growth trajectory. Whether you'reโฆ
Education predictors help students and parents navigate the complex world of competitive exams, college admissions, andโฆ
Real estate predictors help homebuyers, investors, and property owners make smarter decisions about one of life'sโฆ
Creator growth predictors help YouTubers, Instagram creators, TikTokers, and podcasters forecast their audience growthโฆ
Retirement and FIRE (Financial Independence, Retire Early) predictors help you plan for financial freedom. Whetherโฆ
Fitness predictors help you set realistic goals and timelines for your health journey. Whether you want to lose weight,โฆ
Lifestyle predictors are fun, shareable tools that combine data with entertainment. From marriage timeline predictionsโฆ
E-commerce predictors help online sellers, Shopify store owners, Amazon FBA sellers, and dropshippers forecast revenue,โฆ
ProCalc is a free collection of online calculators designed for anyone who needs quick, accurate calculations. From personal finance planning with our SIP and EMI calculators, to estimating YouTube ad revenue, to calculating OpenAI API costs for your next AI project โ we have tools for every need.
All our calculators are completely free to use. There is no sign-up required, no data is collected, and all calculations happen entirely in your browser. We believe that financial and technical tools should be accessible to everyone, which is why we are building the most comprehensive collection of free online calculators on the web.
Our calculator ecosystem spans multiple categories: Finance (SIP, EMI, compound interest, retirement planning), Creator Tools (YouTube money, Instagram earnings, podcast revenue), AI Tools (OpenAI costs, Claude API pricing, token counting), and Business (break-even, profit margins, CAC, LTV).
Each calculator comes with detailed explanations, formulas, worked examples, and frequently asked questions. We do not just give you a number โ we help you understand what it means and how to use it to make better decisions.
Online calculators save you time and reduce errors compared to manual calculations. Whether you are planning your monthly budget, estimating how much your SIP investments will grow over 10 years, or figuring out the break-even point for a new product launch, having a reliable calculator at your fingertips makes all the difference.
Traditional spreadsheets require you to build formulas from scratch and double-check every cell reference. With ProCalc, the formulas are already built, tested, and explained. You simply enter your numbers and get instant, accurate results. Every calculator also shows the formula used, so you can verify the math yourself.
For students, our math calculators cover percentages, HCF, LCM, and unit conversions that align with school curricula. For professionals, our finance and business tools handle complex scenarios like tax regime comparisons, loan amortization schedules, and customer lifetime value projections.
Using ProCalc is straightforward. Browse our categories or use the search bar above to find the calculator you need. Enter your values into the input fields, and the results appear instantly โ no page reloads, no waiting. All calculations run directly in your browser using JavaScript, which means your data never leaves your device.
Each calculator page includes a detailed explanation of the underlying formula, a step-by-step example calculation, and a frequently asked questions section. This educational approach helps you not only get the answer you need but also understand the reasoning behind it, making you more confident in your financial and business decisions.
ProCalc is optimized for both desktop and mobile devices. Whether you are at your desk planning next quarter's budget or on your phone checking investment returns during your commute, the experience is fast, clean, and easy to use. We continuously add new calculators and improve existing ones based on user feedback.
Personal Finance: Calculate your SIP returns to plan long-term wealth creation. Use the EMI calculator before taking a home or car loan to understand your monthly obligations. Compare the old and new income tax regimes to choose the one that saves you more money.
Content Creators: Estimate your YouTube ad revenue based on views, CPM, and engagement rates. Calculate potential Instagram earnings from sponsored posts. Plan your content strategy with data-driven revenue projections.
Business Owners: Determine your break-even point before launching a new product. Calculate customer acquisition costs and lifetime value to optimize your marketing spend. Use profit margin calculators to price your products competitively.
Students and Educators: Solve percentage problems, find HCF and LCM, convert units between metric and imperial systems, and explore compound interest concepts with interactive calculators that make learning math engaging and practical.