24-hour prototype
Student Software Builds
Custom full-stack web, AI/ML and mobile applications with clean code, remote setup and a prototype demonstration before payment.
Smart Calculators for Smarter Decisions
Free online calculators for finance, health, math, and everyday life. Fast, accurate, and easy to use — no signup required.
100% Free
All calculators are free to use. No hidden charges.
Instant Results
Get quick and accurate results in seconds.
Easy to Use
Simple interface designed for everyone.
Mobile Friendly
Works perfectly on all devices and screen sizes.
Services and featured tools
Practical tools and development services
Explore state-wise calculators, custom software prototyping and browser automation services from DevCalc.
Playwright and Python
Automation & Scraping
Automate browser tasks, business workflows, data extraction and repetitive pipelines with maintainable custom scripts.
Ready Reckoner 2026
Stamp Duty Calculator
Calculate property registration costs, circle rates and applicable women rebates across supported Indian states.
MH, KA, DL, UP and TN
RTO Road Tax Calculator
Check vehicle tax slabs, fuel-specific rates, EV policy waivers and BH Series registration guidance.
Interactive speed-math game
Calculator Tug of War — Beat the Bot
Test your mental arithmetic speed in a head-to-head tug of war against the DevCalc bot.
Vehicle Calculators(5)
Optimize your real-world transit economics. Instantly calculate car or bike mileage, trip fuel expenses, alternative CNG parameters, and daily vehicle running costs.
Vehicle
IRCTC Ticket Cancellation Refund Calculator
Estimate the refund and cancellation deduction for confirmed, RAC, waitlisted, Tatkal, cancelled-train, and train-delay e-ticket scenarios.
Calculate Now
Vehicle
Mileage Calculator
Calculate your car or bike's real mileage in km/L, fuel cost per kilometre, and total trip expense from distance travelled, fuel used, and fuel price.
Calculate Now
Vehicle
Fuel Cost Calculator
Calculate daily, monthly, yearly fuel expenses and cost per kilometre for petrol, diesel, and CNG vehicles.
Calculate Now
Vehicle
Road Tax Calculator
Calculate road tax, RTO registration charges, and on-road price addition for your car or bike instantly. Get accurate state-wise motor vehicle tax slabs for petrol, diesel, CNG, and electric vehicles across all Indian states and union territories.
Calculate Now
Vehicle
EV vs. Petrol Cost Calculator
Compare the total cost of ownership between Electric Vehicles (EVs) and petrol-powered cars. Calculate savings on fuel, energy, and maintenance to determine your long-term return on investment.
Calculate Now
Utility Calculators(8)
Track day-to-day timeline milestones cleanly. Compute precise durations between dates, track exact chronological age indexes, and run personal record calculations.
Utility
Age Calculator
Calculate your exact age instantly from your date of birth. Find your age in years, months, weeks, days, hours, minutes, and seconds using our free online Age Calculator.
Calculate Now
Utility
Date Calculator
Calculate the exact difference between two dates in years, months, weeks, days, hours, and minutes. Use our free Date Calculator for date duration, countdowns, and date interval calculations.
Calculate Now
Utility
Unit Converter
Convert common length, weight, and temperature units with clear, instant results.
Calculate Now
Utility
Password Generator
Create customizable example passwords with uppercase letters, lowercase letters, numbers, and symbols directly in your browser.
Calculate Now
Utility
Random Number Generator
Generate a pseudo-random integer between an inclusive minimum and maximum for casual games, samples, and everyday decisions.
Calculate Now
Utility
QR Code Generator
A free, easy-to-use QR Code Generator for websites, text, emails, phone numbers, WiFi networks, and more. Create a custom QR code in seconds, preview it instantly, and download it in high resolution — perfect for business cards, posters, menus, or sharing information quickly without typing.
Calculate Now
Health Calculators(16)
Monitor your vital body composition and biometric baselines. Calculate exact BMI scores, track healthy prenatal gestational weight gain curves, and map peak ovulation windows.
Health
BMI Calculator
Calculate your Body Mass Index (BMI) instantly using your height and weight. Determine whether you are underweight, normal weight, overweight, or obese across both International WHO and Asian-specific ICMR diagnostic standards.
Calculate Now
Health
BMR Calculator
Calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor Equation. Estimate the number of calories your body burns at rest and determine your daily calorie requirements based on activity level.
Calculate Now
Health
Calorie Calculator
Calculate your Total Daily Energy Expenditure (TDEE) and daily calorie targets for sustainable fat loss, muscle gain, or weight maintenance based on the clinical Mifflin-St Jeor equation and physical activity coefficients.
Calculate Now
Health
Body Fat Calculator
Calculate your body fat percentage using the U.S. Navy Method. Estimate body fat levels for men and women and determine your body fat category instantly.
Calculate Now
Health
Ideal Body Weight Calculator
Calculate your ideal body weight (IBW) by height and gender using the Devine, Hamwi, Robinson, and Miller formulas. Get an instant healthy weight range to guide fitness, nutrition, and weight management goals.
Calculate Now
Health
Water Intake Calculator
Calculate your recommended daily fluid intake based on body weight, physical exertion levels, and environmental climate factors following EFSA and National Academies hydration guidelines.
Calculate Now
Math Calculators(14)
Solve advanced linear algebra grids and equation systems effortlessly. Run matrices additions, dot-product multiplications, matrix inversions, and scalar determinants.
Math
Percentage Calculator
Calculate percentages, percentage increases, percentage decreases, and proportional fractions instantly. Multi-mode calculator for finding 'What is X% of Y', 'X is what % of Y', and percent change.
Calculate Now
Math
Fraction Calculator
Calculate fractions instantly. Add, subtract, multiply, divide, simplify fractions, convert fractions to decimals, and solve mixed fraction problems online.
Calculate Now
Math
Mean Median Mode Calculator
Calculate mean, median, and mode instantly from a set of numbers. Use our free Mean Median Mode Calculator to analyze data, statistics, averages, and distributions quickly and accurately.
Calculate Now
Math
Ratio Calculator
Calculate, simplify, compare, and solve ratios instantly. Use our free Ratio Calculator to find equivalent ratios, ratio values, proportions, and ratio relationships quickly and accurately.
Calculate Now
Math
Standard Deviation Calculator
Calculate standard deviation, variance, mean, and data spread instantly. Use our free Standard Deviation Calculator for statistics, research, education, and data analysis.
Calculate Now
Math
Probability Calculator
Calculate probability, odds, event likelihood, and chance percentages instantly. Use our free Probability Calculator for statistics, mathematics, education, and exam preparation.
Calculate Now
Finance Calculators(19)
Simplify your financial planning with accurate tools for calculating loan EMIs, mutual fund compound interest, wealth accumulation, and annual tax returns under latest regimes.
Finance
GST Calculator
Calculate Indian Goods and Services Tax (GST) instantly for both inclusive and exclusive amounts. Breakdown base price, CGST, SGST, IGST, and total invoice value across all standard GST slabs (5%, 12%, 18%, 28%).
Calculate Now
Finance
EMI Calculator
Calculate monthly EMI, total interest payable, and total loan repayment amount instantly. Plan home loans, car loans, and personal loans with accurate amortization breakdowns.
Calculate Now
Finance
SIP Calculator
A free SIP Calculator built to help you plan smarter mutual fund investments. Just enter your monthly investment amount, expected rate of return, and investment duration to instantly see your total invested amount, wealth gained, and projected maturity value — making it easier to plan systematic investments and work toward long-term financial goals like retirement, education, or wealth creation.
Calculate Now
Finance
FD Calculator
Calculate Fixed Deposit (FD) maturity amount, cumulative interest earned, and quarterly compounding returns. Compare interest rates across leading Indian public, private, and small finance banks with DICGC insurance and tax deduction guidance.
Calculate Now
Finance
Simple Interest Calculator
Calculate simple interest, interest earned, and total maturity amount instantly.
Calculate Now
Finance
Discount Calculator
Calculate sale prices, net savings, and successive stacked discounts (e.g. 50% + 20% off) instantly. Determine true discount percentages from MRP to checkout price.
Calculate Now
Education Calculators(9)
Stay on top of your academic scores. Convert marks to percentages, work out GPA and CGPA, find the grade you still need in a final exam, and plan your study hours.
Education
GPA Calculator
Calculate Semester Grade Point Average (SGPA), Cumulative GPA (CGPA), and percentage conversions using the University Grants Commission (UGC) 10-point Choice Based Credit System (CBCS) and US 4.0 scale.
Calculate Now
Education
Attendance Calculator
Calculate your current class attendance percentage, determine the exact number of consecutive lectures needed to reach mandatory 75% or 80% criteria, and calculate how many classes can be safely skipped.
Calculate Now
Education
CGPA Calculator
Calculate your CGPA (Cumulative Grade Point Average) and convert it into percentage instantly. Add grades and credits for multiple subjects to get accurate results.
Calculate Now
Education
Average Calculator
Need to find the average of a list of numbers? This free calculator instantly works out the mean, total, count, minimum, and maximum values — and shows you the full step-by-step calculation so you understand exactly how the result was reached.
Calculate Now
Education
Scientific Calculator
Free online Scientific Calculator (Sci Calculator / SC Calculator) for advanced mathematical calculations including trigonometry, logarithms, powers, roots, factorials, exponents, and engineering calculations.
Calculate Now
Education
Final Grade Calculator
Calculate the score you need on your final exam to achieve your desired course grade. Quickly determine required marks using your current grade, final exam weight, and target grade.
Calculate Now
Fun Calculators(6)
Lighthearted calculators for a quick smile. Check a playful love or friendship score, find your lucky number, or test zodiac compatibility — just for entertainment.
Fun
Love Calculator
Enter two names to generate a repeatable love percentage and playful compatibility message. This private, name-based love test is free and intended for entertainment.
Calculate Now
Fun
Friendship Calculator
Check friendship compatibility between two people using their names. Discover your friendship percentage, bond strength, and compatibility level instantly with our free Friendship Calculator — a fun way to celebrate any friendship.
Calculate Now
Fun
Crush Calculator
Check your crush compatibility percentage instantly with our free Crush Calculator — just enter two names to discover your crush match score, relationship potential, and compatibility level. Fun, fast, and free to use anytime, anywhere, with no sign-up required!
Calculate Now
Fun
Lucky Number Calculator
Calculate your lucky number using your date of birth. Discover your numerology number, personality traits, strengths, and life path insights instantly with our free Lucky Number Calculator.
Calculate Now
Fun
Zodiac Compatibility Calculator
Check your zodiac sign compatibility instantly with our free Zodiac Compatibility Calculator — just select two zodiac signs (or enter birth dates) to discover your love match percentage, element compatibility, and relationship potential. Fun, fast, and free to use anytime, anywhere, with no sign-up required!
Calculate Now
Fun
Kundli Milan Calculator (Guna Milan Score)
Compare the bride's and groom's Rashi or Nakshatra to estimate an Ashtakoot Guna Milan score out of 36. Includes the eight-koota breakdown and clear limitations.
Calculate Now
Construction Calculators(8)
Plan structural raw material logistics with industrial precision. Calculate total brick counts, mortar volumes, concrete mixing frameworks, and structural masonry budgets.
Construction
House Construction Cost Calculator
Estimate house construction cost in India from built-up area, city tier, quality, and floors. Review per-square-foot rates plus material and labour shares.
Calculate Now
Construction
Brick Calculator
Estimate bricks or blocks for a wall from its length, height, and thickness, including joint volume, wastage, unit price, and material cost.
Calculate Now
Construction
Cement Calculator
Estimate 50 kg cement bags, cement weight, volume, and cost for slabs, foundations, beams, columns, and floors using project dimensions and concrete grade.
Calculate Now
Construction
Concrete Calculator
Calculate concrete volume, cement bags, sand quantity, aggregate quantity, and material costs for slabs, foundations, columns, beams, and construction projects.
Calculate Now
Construction
Tile Calculator
Find out exactly how many tiles, boxes, and how much grout and adhesive you need for any room. Enter your room dimensions, tile size, and a safety wastage margin — and get a clear breakdown of tiles required, boxes to buy, and estimated cost, so you don't run short mid-job or overspend on extras.
Calculate Now
Construction
Rebar Cutting Length Calculator
Calculate the exact cutting length of reinforcement bars before fabrication. Enter the bar shape, span or member dimension, diameter, bend angles, hook type, and concrete cover — and get the cutting length, bend deductions, and steel weight, based on IS 2502 practice used across Indian construction sites.
Calculate Now
Developer Tools Calculators(9)
Accelerate your programming workflow. Validate or minify raw JSON syntax logs, generate secure random UUID v4 strings, and encode percent-escaped URLs safely.
Developer Tools
JSON Formatter
Fix, format, beautify, validate, and minify JSON data instantly with one click. Free online JSON Formatter and JSON Beautifier for developers.
Calculate Now
Developer Tools
UUID Generator
Generate UUID v4 identifiers instantly. Create single or multiple unique UUIDs for development, databases, APIs, testing, and distributed architecture.
Calculate Now
Developer Tools
Base64 Encoder Decoder
Encode text or binary data to Base64 strings and decode Base64 back to its original format instantly. Free, secure, client-side online developer utility.
Calculate Now
Developer Tools
URL Encoder Decoder
Encode and decode URLs instantly. Convert special characters into percent-encoded, URL-safe formats or parse encoded strings back into human-readable text.
Calculate Now
Developer Tools
JWT Decoder
Decode JWT tokens instantly, right in your browser — nothing is sent to a server. View the header, payload, expiration time, and issue time at a glance.
Calculate Now
Developer Tools
Hash Generator
Instantly generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes online — completely free. Built for developers, cybersecurity professionals, students, and IT administrators who need quick, reliable hashing.
Calculate Now
Other Calculators(13)
Handy everyday helpers that don't fit a single box. Generate passwords and QR codes, convert units and timestamps, and run quick one-off calculations in seconds.
Other
Gold Making Charges Calculator
Work out the real price of gold jewellery before you walk into a store. Enter the gold rate, weight, purity, making charge percentage (or flat rate), hallmarking fee, and GST — and see exactly how each rupee adds up to your final bill.
Calculate Now
Other
Gold Price Calculator
Find out what your gold is worth in seconds. Enter today's gold rate, weight, and purity — in grams, kilograms, tola, or ounces — and get an instant, accurate value for 24K, 22K, 18K, and 14K gold.
Calculate Now
Other
Silver Price Calculator
Find out what your silver is worth in seconds. Enter today's silver rate, weight, and purity — in grams, kilograms, tola, or ounces — and get an instant, accurate value for fine, sterling, and other common silver purities.
Calculate Now
Other
Gold GST Calculator
Work out exactly how much GST applies to your gold purchase. Select your purity, enter the gold rate, weight, and making charges — and see the 3% GST on gold value and 5% GST on making charges calculated separately, plus your final bill.
Calculate Now
Other
Wedding Budget Calculator
Estimate your total wedding cost in India by guest count, city tier, and style, with a category-wise breakdown covering venue, catering, décor, photography, attire, and more.
Calculate Now
Other
Party Budget Calculator
Estimate the total cost of a birthday, anniversary, or house party in India by guest count, venue type, and catering style, with a clear category-wise cost breakdown.
Calculate Now
Calculator Categories
Browse calculators by category and find the right tool for your needs.
Finance
19 Calculators
View Calculators →Health
16 Calculators
View Calculators →Math
14 Calculators
View Calculators →Utility
8 Calculators
View Calculators →Education
9 Calculators
View Calculators →Fun
6 Calculators
View Calculators →Construction
8 Calculators
View Calculators →Developer Tools
9 Calculators
View Calculators →Other
13 Calculators
View Calculators →Vehicle
5 Calculators
View Calculators →