Calculators Directory
Your one-stop destination for free, accurate, and easy-to-use online calculators. From finance to health, find the right tool for every calculation.
SIP & Mutual Funds
SIP Calculator
Estimate future returns on your Systematic Investment Plans.
SWP Calculator
Calculate monthly withdrawals and remaining corpus.
Lumpsum Calculator
Calculate returns on one-time mutual fund investments.
Step-up SIP Calculator
See how increasing your SIP annually boosts your wealth.
Mutual Fund Calculator
Calculate returns for both SIP and Lumpsum investments.
ELSS Calculator
Plan tax-saving investments with 80C benefits.
Goal SIP Calculator
Calculate monthly investment needed to reach a target amount.
XIRR Calculator
Calculate annualized return (XIRR) for irregular cash flows.
Stocks & Returns
Stock Average Calculator
Calculate the average price of your stock holdings.
CAGR Calculator
Calculate Compound Annual Growth Rate of your assets.
Dividend Yield Calculator
Calculate stock dividend yield and passive income.
Real Return Calculator
Calculate investment returns after inflation and taxes.
Cost of Delay Calculator
See the cost of delaying your investments.
Fixed Income & Savings
FD Calculator
Calculate maturity value and interest on Fixed Deposits.
RD Calculator
Calculate returns on your Recurring Deposits.
Simple Interest Calculator
Calculate basic interest on your principal amount.
Compound Interest Calculator
Calculate compound interest with different frequencies.
Bond Yield Calculator
Calculate Current Yield and Yield to Maturity for bonds.
NSC Calculator
Calculate National Savings Certificate maturity value.
Post Office MIS Calculator
Calculate monthly income from Post Office MIS.
Government Schemes
PPF Calculator
Calculate tax-free returns on Public Provident Fund.
SSY Calculator
Calculate Sukanya Samriddhi Yojana maturity value.
NPS Calculator
Plan your pension and lump sum from National Pension System.
EPF Calculator
Estimate your Employee Provident Fund corpus at retirement.
APY Calculator
Calculate Atal Pension Yojana contributions and pension.
SCSS Calculator
Senior Citizen Savings Scheme quarterly income calculator.
Gratuity Calculator
Calculate gratuity payout based on service years.
Retirement Planning
Indian Loans & EMI
EMI Calculator
Calculate monthly EMIs for any loan amount and tenure.
Home Loan Calculator
Calculate home loan EMI and total interest payable.
Car Loan Calculator
Plan your car purchase with accurate EMI estimates.
Personal Loan Calculator
Calculate repayment schedule for personal loans.
Loan Prepayment Calculator
See how much interest you save by prepaying your loan.
Loan Eligibility Calculator
Estimate the maximum loan amount you can borrow.
Flat vs Reducing Calculator
Compare flat vs reducing interest rates on loans.
US Loans & Mortgage
Mortgage Calculator
Calculate US mortgage payments with PMI, taxes, and insurance.
Amortization Calculator
View full loan amortization schedule with payment breakdown.
Refinance Calculator
Compare current mortgage with refinancing options.
Student Loan Calculator
Plan student loan repayment and compare strategies.
Auto Lease Calculator
Calculate monthly lease payments and total cost.
Credit Card Payoff Calculator
Calculate payoff time and interest for credit cards.
DTI Calculator
Calculate debt-to-income ratio for mortgage eligibility.
Tax (India)
Income Tax Calculator
Calculate income tax under Old vs New Tax Regime.
Capital Gains Calculator
Calculate LTCG and STCG on stocks and property.
HRA Calculator
Calculate HRA tax exemption for salaried employees.
TDS Calculator
Calculate TDS on Salary, FD, Rent, and Crypto.
Advance Tax Calculator
Calculate advance tax installments and liability.
80C Optimizer
Maximize your Section 80C tax savings.
Professional Tax Calculator
Calculate state-wise Professional Tax deduction.
Salary & Income
Utility
GST Calculator
Calculate GST inclusive or exclusive amounts easily.
Discount Calculator
Calculate final price after multiple discounts.
Inflation Calculator
See how inflation impacts purchasing power over time.
Expense Ratio Calculator
See how fund expense ratios impact your long-term wealth.
Asset Allocation Calculator
Get personalized portfolio allocation based on age and risk.
Life Planning
Emergency Fund Calculator
Calculate the size of your emergency safety net.
Education Cost Calculator
Estimate future cost of your child's education.
Wedding Cost Calculator
Plan expenses and savings for a wedding.
Net Worth Calculator
Track your total assets versus liabilities.
Insurance Needs Calculator
Calculate how much life insurance cover you need.
SaaS & Economics
Margin & Markup Calculator
Convert between profit margin and markup percentage.
VAT/Sales Tax Calculator
Add, remove, or calculate VAT and sales tax.
Break-Even Calculator
Calculate break-even point in units and revenue.
Freelance Rate Calculator
Calculate ideal hourly rate for freelancers.
Churn Rate Calculator
Calculate customer and revenue churn rates.
SaaS MRR/ARR Calculator
Track MRR, ARR, and SaaS growth metrics.
SaaS LTV:CAC Calculator
Evaluate SaaS unit economics with LTV:CAC ratio.
Sales Commission Calculator
Calculate flat or tiered sales commissions and total compensation.
NPV Calculator
Calculate Net Present Value for capital budgeting decisions.
IRR Calculator
Find the Internal Rate of Return for investment projects.
WACC Calculator
Calculate Weighted Average Cost of Capital for your company.
Depreciation Calculator
Calculate asset depreciation with straight-line, declining balance, and SYD methods.
Working Capital Calculator
Analyze working capital, current ratio, and quick ratio.
Burn Rate Calculator
Calculate startup burn rate, net burn, and cash runway.
Discount Impact Calculator
Analyze volume increase needed to offset a price discount.
Productivity & Team
Risk Assessment Matrix
Evaluate and prioritize risks visually with an interactive 5×5 heat map matrix.
Decision Matrix
Evaluate multiple options against weighted criteria for data-driven decisions.
MoSCoW Prioritizer
Drag-and-drop task prioritization using Must Have, Should Have, Could Have, Won't Have.
Eisenhower Matrix
Prioritize tasks into Do First, Schedule, Delegate, and Eliminate quadrants using the Eisenhower Decision Matrix.
Team Availability Heatmap
Visualize team availability across the week and find optimal meeting windows.
Workload Balancer
Assign tasks, visualize utilization, and identify overloaded or under-capacity team members.
Skills Matrix Builder
Map team skills and proficiency levels, identify gaps, and calculate coverage scores.
RACI Matrix Builder
Build, validate, and export RACI matrices to clarify team roles and responsibilities.
Agile & Scrum
Project Scope Generator
Build robust project scopes by distinguishing exactly what is In-Scope vs Out-of-Scope.
Estimation Poker
Real-time sprint planning tool for agile teams with blind voting and consensus insights.
Retrospective ROI Calculator
Measure the financial return on investment of improvements generated by team retrospectives.
T-Shirt Size to Hours Converter
Translate agile relative estimates into actual hourly budget projections and variances.
ROI & Payback Period
Calculate how many sprints it takes for a newly delivered feature to pay for its own development cost.
Standup Roulette
Daily scrum randomizer and timer to keep updates focused and concise.
WSJF Calculator
Weighted Shortest Job First prioritization tool for sequencing features for maximum economic value.
Vitals & General
Emergency & Trauma
Sepsis & Critical Care
Cardiac Scores
HEART Score Calculator
Chest pain risk stratification.
TIMI Calculator
ACS risk assessment.
CHADS-VASc Calculator
Afib stroke risk score.
HAS-BLED Calculator
Bleeding risk on anticoagulation.
QTc Calculator
Corrected QT interval (Bazett/Fridericia).
Framingham Calculator
10-year cardiovascular disease risk.
RCRI Calculator
Revised Cardiac Risk Index for surgery.
Clotting & PE/DVT
Nephrology & Electrolytes
eGFR Calculator
CKD-EPI kidney function estimate.
CrCl Calculator
Cockcroft-Gault for drug dosing.
FeNa Calculator
Fractional excretion of sodium.
Anion Gap Calculator
Metabolic acidosis workup.
Osmolality Calculator
Serum osmolality calculation.
Corrected Sodium Calculator
Sodium correction for hyperglycemia.
Corrected Calcium Calculator
Calcium correction for albumin.
Fluid Deficit Calculator
Free water deficit calculation.
Hepatology & GI
Pulmonary & Hematology
Psychiatry & Neuro
Body Composition
BMI Calculator
Calculate your Body Mass Index and check weight status.
Body Fat Calculator
Estimate body fat using the US Navy tape measure method.
Ideal Weight Calculator
Find your ideal weight using Devine and other formulas.
WHR Calculator
Calculate waist-to-hip ratio for health risk assessment.
BSA Calculator
Calculate body surface area using multiple formulas.
LBM Calculator
Calculate lean body mass and fat-free mass.
Metabolism & Calories
BMR Calculator
Calculate your Basal Metabolic Rate - calories burned at rest.
TDEE Calculator
Calculate total daily calories burned based on activity level.
Calorie Deficit Calculator
Plan weight loss with safe calorie deficit and timeline.
Macro Calculator
Calculate protein, carbs, and fat for your goals.
Hydration & Sleep
Fitness & Training
Women's Health
Lifestyle & Risks
BAC Calculator
Calculate blood alcohol content based on drinks and body weight.
Smoking Cost Calculator
Calculate the financial and health cost of smoking.
Life Expectancy Calculator
Estimate life expectancy based on lifestyle factors.
Age Calculator
Calculate precise age and days until next birthday.
Love & Relationships
Love Compatibility Calculator
Test your compatibility match with your crush or partner.
Relationship Duration Calculator
Track exactly how long you have been together in years, months, and days.
Date Night Budget Calculator
Plan the perfect date night while tracking expenses for dinner, drinks, and fun.
Anniversary Forecaster
Find out when your 1,000th or 10,000th day together will be.
Proposal Cost Calculator
Estimate costs for the perfect proposal including ring, venue, and photos.
Days Until Valentine's Day
Countdown to the most romantic day of the year.
Zodiac Love Compatibility
Check your astrological compatibility with your partner.
Long Distance Relationship Calculator
Calculate travel costs and time spent together in a long-distance relationship.
Crush Chance Calculator
Analyze the signs and see if they like you back.
Chocolate & Flower Budget Calculator
Estimate the cost of roses, chocolates, and gifts.
Basic Math
Geometry (2D)
Circle Calculator
Calculate radius, diameter, circumference, and area of circles.
Right Triangle Calculator
Calculate sides, area, and perimeter using Pythagorean theorem.
Rectangle Calculator
Calculate area, perimeter, and diagonal of a rectangle.
Slope Calculator
Calculate slope between two points.
Geometry (3D)
Cylinder Calculator
Calculate volume, surface area of a cylinder.
Sphere Calculator
Calculate volume and surface area of a sphere.
Cone Calculator
Calculate volume, surface area, and slant height of a cone.
Cube Calculator
Calculate volume, surface area, and diagonals of a cube.
Probability Basics
Probability Calculator
Calculate simple, independent, and conditional probabilities.
Permutation Calculator
Calculate arrangements with or without repetition (nPr).
Combination Calculator
Calculate selections with or without repetition (nCr).
Odds Calculator
Convert between probability, decimal, and moneyline odds.
Expected Value Calculator
Calculate expected value (EV) for random variables.
Bayes Theorem Calculator
Calculate conditional probability P(A|B) using priors.
Discrete Distributions
Binomial
Calculate success probabilities for binomial experiments.
Poisson
Calculate probabilities for rare events (Poisson).
Geometric
Calculate trials until first success.
Hypergeometric
Successes in draws w/o replacement.
Negative Binomial
Trials needed for r successes.
Continuous Distributions
Normal Distribution
Calculate probabilities and Z-scores for normal curves.
Exponential
Calculate time between events.
Uniform
Probabilities for range [a, b].
Beta Distribution
Probability on interval [0, 1].
Gamma Distribution
Two-parameter continuous distribution.
Weibull
Reliability and failure analysis.
Log-Normal
Models positive skewed data.
Pareto
Power-law (80-20 rule) distribution.
Cauchy
Lorentz distribution (undefined mean).
Descriptive Stats
Mean, Median, Mode
Calculate central tendency, range, and distribution stats.
Standard Deviation
Calculate SD, variance, and mean for population/sample.
Variance
Calculate variance and standard deviation for datasets.
Percentile
Calculate percentiles, quartiles, and IQR.
Correlation
Calculate Pearson correlation (r) and linear regression.
Inferential Stats
Confidence Interval
Calculate confidence intervals for means and proportions.
Sample Size
Determine required sample size for surveys and studies.
Margin of Error
Calculate margin of error for surveys and polls.
Standard Error
Calculate Standard Error of the Mean (SEM).
Hypothesis Testing
Z-Score
Calculate Z-score from raw value and vice versa.
Z-Test
Perform one-sample Z-test for known population SD.
T-Test
Perform one-sample T-test for unknown population SD.
Chi-Square
Perform Goodness of Fit and Independence tests.
ANOVA (One-Way)
Compare means of 3+ groups using F-test.
p-value
Calculate p-value from Z, t, Chi-Square, or F score.
Relative Risk
Calculate RR, Odds Ratio, and NNT.
Kinematics
Speed & Velocity
Calculate speed, distance, and time.
Acceleration
Calculate change in velocity.
Kinematic Equations
SUVAT solver for motion.
Projectile Motion
Range, height, and trajectory.
Free Fall
Velocity and position under gravity.
Forces & Dynamics
Energy & Work
Electricity & Engines
Ohm's Law Calculator
Calculate Voltage, Current, Resistance, and Power.
Voltage Drop Calculator
Calculate electrical voltage loss over distance per NEC guidelines.
Resistor Color Code
Decode 4, 5, or 6-band resistor color codes.
Horsepower Calculator
Calculate engine HP from torque, performance, or convert power units.
Molarity Calculator
Calculate molarity, mass, volume, and dilutions.
Wind Chill & Heat Index
Calculate apparent temperature from wind chill or heat index.
Square Footage Calculator
Calculate area for rectangles, triangles, circles, and more.
Material Estimation
Concrete Calculator
Calculate concrete bags and cubic yards for slabs and footings.
Paint Calculator
Estimate paint gallons for rooms and walls.
Tile Calculator
Calculate tiles and boxes needed for floors and walls.
Roofing Calculator
Estimate roof area and shingle bundles required.
Flooring Calculator
Estimate flooring boxes and cost for rooms.
Mulch & Gravel Calculator
Estimate cubic yards and bags of mulch or gravel.
Stair Calculator
Calculate rise, run, and step count for stairs.
Wallpaper Calculator
Estimate wallpaper rolls with pattern repeat.
Drywall Calculator
Estimate sheets, tape, and compound for walls.
Deck Calculator
Estimate decking boards, joists, and concrete for decks.
Advertising & ROI
ROAS Calculator
Calculate Return on Ad Spend and campaign profitability.
CAC Calculator
Calculate Customer Acquisition Cost from marketing spend.
LTV Calculator
Calculate Customer Lifetime Value and profit LTV.
CPM Calculator
Calculate Cost Per 1,000 Impressions for ad campaigns.
Conversion Rate Calculator
Calculate funnel conversion rates and revenue per visitor.
Date Calculations
Date Duration
Calculate the duration between two dates in years, months, and days.
Date +/-
Add or subtract years, months, and days from a date.
Workday Calculator
Calculate working days between dates, excluding weekends and holidays.
Time Zone Converter
Convert time across multiple time zones instantly.
Week Number Calculator
Find the ISO week number for any date, with week boundaries and days remaining.
Leap Year Calculator
Check if any year is a leap year and find upcoming leap years.
Quarter Calculator
Find the calendar and fiscal quarter for any date with days remaining.
Calendar
Interactive monthly calendar with week numbers, day info, and quick navigation.
Holiday Calendar
Public holidays for 150+ countries. Filter by type and region.
Festival Calendar
Religious & cultural festivals across Hindu, Islamic, Christian, Sikh, Buddhist, and Jewish traditions.
Time Tools
Clock
Full-screen live digital clock with timezone support, 12/24h format, and millisecond precision.
Stopwatch
Precise stopwatch with lap splits and millisecond accuracy.
Timer
Set a countdown with presets, keyboard shortcuts, full-screen mode, and alarm.
Countdown Timer
Create a live countdown to any date, event, or deadline.
Time Duration Calculator
Calculate the exact duration between two clock times. Handles midnight crossovers.
Time Card Calculator
Weekly timesheet: enter daily start/end times and breaks to calculate total hours and pay.
Hours & Minutes Calculator
Add or subtract multiple time durations. Perfect for tracking project or travel time.
Unix Timestamp Converter
Convert between Unix epoch timestamps and human-readable dates.
World Clock
Compare current time across multiple cities and time zones.
Sunrise Sunset Calculator
Find sunrise, sunset, and day length for any location and date.
Cron Schedule Generator
Build, validate, and understand cron expressions with a visual builder and execution forecast.
Daily Tools
Fuel Cost Calculator
Calculate trip fuel cost, split among passengers, with CO₂ estimate.
Electricity Cost Calculator
Estimate electricity cost for any appliance per day, month, and year.
Tip Calculator
Calculate tip and split the bill among friends easily.
Pizza Party Calculator
Figure out how many pizzas to order for your next party.
Password Strength Checker
Analyze password strength, entropy, and crack time.
Password Generator
Generate strong passwords and check strength instantly.
QR Code Generator
Generate QR codes for URLs, text, email, phone, and Wi-Fi.
Tire Size Calculator
Compare tire sizes, speedometer correction, and revolutions per mile.
TV Size Calculator
Find the optimal viewing distance for your TV size and resolution.
Carbon Footprint Calculator
Estimate your annual CO₂ emissions from transport, home, and diet.
Dog Age Calculator
Convert dog years to human years using modern veterinary research.
Network Tools
Subnet/CIDR Calculator
Calculate network address, broadcast, host range, wildcard mask from IP and subnet.
IP Address Converter
Convert IP addresses between decimal, binary, hexadecimal, and integer formats.
Bandwidth Calculator
Estimate transfer time from file size and speed, or calculate required bandwidth.
VLAN Planner
Plan VLAN subnets with VLSM allocation for departments and segments.
Port Number Lookup
Search TCP/UDP port numbers by port or service name.
DNS TTL Calculator
Convert DNS TTL between seconds and human-readable time with common presets.
Built for Everyone
Simple, reliable tools for your daily calculations.
Reliable Standard
We use widely accepted formulas and standard algorithms to provide useful estimates you can trust.
Privacy Friendly
Calculations run right in your browser. We don't store your personal data or inputs.
Easy to Use
No complex setups or signups. Just simple, straightforward tools designed to get you the answer fast.
Can't find what you need?
We're constantly adding new calculators. Let us know what tools would help you most!
Social & Content
Email Marketing ROI Calculator
Calculate email campaign ROI, revenue, and funnel metrics.
Engagement Rate Calculator
Calculate social media engagement rate from interactions.
A/B Test Calculator
Check if A/B test results are statistically significant.
Influencer Earnings Estimator
Estimate influencer sponsorship earnings by platform and niche.
YouTube Money Calculator
Estimate YouTube ad revenue and sponsorship income.