Best Free Calculators Online

Convert numbers to Roman numerals and vice versa instantly. Supports large numbers and historical formats.

Convert any number into words (English, Indian numbering system) for cheques, invoices, and documents.

Calculate the exact duration between two dates in years, months, weeks, days, hours, and minutes. Fast, 100% private client-side processing with zero file uploads and no registration required.

Calculate the number of working days or business days between two dates, excluding weekends and holidays.

Convert your Indian percentage or 10-point CGPA into the standard US 4.0 GPA scale for study abroad.

Calculate the maturity amount and interest earned on your monthly Recurring Deposit (RD) investments.

Estimate your gratuity amount based on your last drawn salary and years of service in India. Fast, 100% private client-side processing with zero file uploads and no registration required.

Calculate your EPF maturity amount based on your basic salary, monthly contribution, and current interest rate.

Create professional invoices for Indian freelancers and businesses with GST, discounts, and PDF download for free.

Calculate GST amount, inclusive/exclusive price, CGST, SGST, and IGST for Indian invoices instantly.

Calculate monthly EMI, total interest, and repayment amount for home loans, car loans, and personal loans.

Calculate estimated SIP returns and wealth growth for mutual fund investments online for free. Fast, 100% private client-side processing with zero file uploads and no registration required.

Calculate fixed deposit maturity amount and interest with quarterly compounding for Indian banks. Fast, 100% private client-side processing with zero file uploads and no registration required.

Calculate your monthly in-hand salary from annual CTC with PF, professional tax, and income tax deductions.

Convert your CGPA into percentage using common Indian university formulas like CBSE 9.5x, VTU, Mumbai University, DU, AKTU, and Anna University.

Calculate your cumulative GPA (CGPA) from semester-wise SGPA values. Supports credit-weighted and simple average methods.

Calculate how many classes you need to attend to reach 75% attendance or how many classes you can safely miss.

Find out exactly how many marks you need in your final exam to pass or reach your target grade based on internal scores.

Calculate how many classes you need to attend or can safely skip to maintain a minimum 75% attendance rate.

Compute your Semester Grade Point Average (SGPA) based on course credits and grade points earned. Fast, 100% private client-side processing with zero file uploads and no registration required.

Calculate your Cumulative Grade Point Average (CGPA) from semester-wise SGPA or grade points. Fast, 100% private client-side processing with zero file uploads and no registration required.

Convert your CGPA to equivalent percentage marks using standard university formulas (like CBSE 9.5x).

Find out exactly how many marks you need to score in your final exam to achieve your target grade or pass.

Calculate the total number of bricks, cement bags, and sand volume required for building a wall. Fast, 100% private client-side processing with zero file uploads and no registration required.

Estimate the amount of paint in liters and estimated cost needed to cover walls, rooms, or ceilings.

Calculate the total number of floor or wall tiles needed for a room, including waste margins and cost estimates.

Calculate compound interest and future value with regular contributions. See how your savings or investments grow over time, free and instant.

Estimate your monthly mortgage payment, total interest, and total cost from home price, down payment, rate, and term. Free, no signup.

Work out your monthly car payment and total interest from vehicle price, down payment, trade-in, APR, and term. Free auto loan calculator.

Calculate return on investment, net gain, and annualized ROI from your initial and final values. Free investment return calculator.

Find the monthly deposit needed to reach a savings goal by a target date, including interest. Free savings planning calculator.

Calculate the tip, total, and amount per person for any bill. Quick gratuity and bill-splitting calculator, free and no signup.

Calculate your Body Mass Index from height and weight and see your BMI category. Free, private BMI calculator that runs in your browser.

Estimate the fuel needed and total cost for a trip from distance, fuel economy, and price per litre. Free trip fuel cost calculator.

See how inflation changes the value of money over time, including future buying power and the nominal amount needed to keep pace. Free tool.

Calculate the break-even point in units and revenue from fixed costs, variable cost per unit, and selling price. Free business calculator.

Calculate your food cost calculator instantly. Free browser-based calculator with detailed breakdowns.

Calculate your freelance rate calculator instantly. Free browser-based calculator with detailed breakdowns.

Calculate your rent affordability calculator instantly. Free browser-based calculator with detailed breakdowns.

Calculate your home loan eligibility calculator instantly. Free browser-based calculator with detailed breakdowns.

Calculate your property roi calculator instantly. Free browser-based calculator with detailed breakdowns.

Calculate your calorie deficit calculator instantly. Free browser-based calculator with detailed breakdowns.

Calculate your protein intake calculator instantly. Free browser-based calculator with detailed breakdowns.

Calculate your bmi + ideal weight calculator instantly. Free browser-based calculator with detailed breakdowns.

Calculate your daily water intake calculator instantly. Free browser-based calculator with detailed breakdowns.

Calculate your profit margin calculator instantly. Free browser-based calculator with detailed breakdowns.

Calculate and compare your income tax under the Old vs New Tax Regimes for FY 2026-27 (AY 2027-28). Compare deductions, rebates, and slabs to find the optimal regime.

Calculate your target freelance hourly rate, daily rate, and monthly retainers based on desired annual salary, business expenses, taxes, and billable hours.