Free OnlineCalculators.
Interactive tools for splitting bills, managing finances, and solving everyday problems. Fast, free, and beautiful.
Finance
Split Bill Calculator
Free online bill splitter to divide restaurant checks, receipts, tax & tip among friends. Even split or itemized per person with 30+ currencies.
Open ›💵50/30/20 Budget Calculator
Split your income into needs, wants, and savings with customizable percentages. Visual breakdowns, weekly and annual projections, and shareable budget plans.
Open ›📈401k Compound Interest Calculator
See how compound interest grows your savings with employer matching, annual raises, and regular contributions. Year-by-year projections and retirement income estimates.
Open ›🏠Mortgage Payment Calculator
Calculate your monthly mortgage payment with full amortization schedule. See principal, interest, tax, and insurance breakdown with visual charts.
Open ›💳Debt Payoff Calculator
Compare snowball vs avalanche debt payoff strategies side-by-side. Enter multiple debts to see payoff timelines, total interest, and how extra payments accelerate your debt-free date.
Open ›🚗Auto Loan Calculator
Estimate your monthly car payment, compare loan terms side-by-side, and see how extra payments save you thousands. Full amortization schedule and early payoff analysis.
Open ›💼Salary to Hourly Calculator
Convert annual salary to hourly rate or hourly pay to annual salary. Accounts for PTO, paid holidays, overtime, and shows daily, weekly, and monthly breakdowns.
Open ›🔄Refinance Calculator
Should you refinance? Compare your current loan vs new terms side-by-side. See break-even month, monthly savings, and lifetime cost difference for mortgage or auto loans.
Open ›🚙Buy vs Lease Calculator
Compare the true cost of buying vs leasing a car over time. Year-by-year cost analysis with depreciation, equity buildup, and total cost of ownership.
Open ›💎Net Worth Calculator
Calculate your net worth by adding up assets and subtracting liabilities. Visual balance sheet breakdown, milestone badges, and shareable results to track your wealth.
Open ›📱Subscription Tracker
Add all your subscriptions and see monthly/yearly totals with a stacked bar showing where your money goes. Quick-add popular services and track spending by category.
Open ›💹Investment Return Calculator
Compare lump sum vs dollar cost averaging with adjustable return rates and inflation toggle. Growth curve visualization and year-by-year breakdown.
Open ›🎯Savings Goal Calculator
Calculate how much to save monthly to reach your financial goal. See compound interest growth, timeline projections, and year-by-year breakdown to plan your savings.
Open ›🛡️Emergency Fund Calculator
Determine your ideal emergency fund size based on monthly expenses and risk factors. Get personalized recommendations with progress tracking and milestone badges.
Open ›💸Loan Payoff Calculator
Calculate how long to pay off any loan and total interest. See the dramatic impact of extra payments with side-by-side comparison and savings breakdown.
Open ›📊Tax Bracket Calculator
Calculate your 2026 federal income tax bracket and effective tax rate. See total tax owed, marginal vs effective rate, and tax breakdown by bracket with visual charts.
Open ›🏖️Retirement Savings Calculator
Calculate how much you need to save for retirement with year-by-year projections. Factor in current age, savings, contributions, returns, and inflation to reach your retirement goals.
Open ›💳Credit Card Payoff Calculator
Calculate how long to pay off credit card debt and total interest paid. Compare minimum payments vs fixed monthly payments to see how extra payments save money.
Open ›⏰Hourly to Salary Calculator
Convert hourly wage to annual salary or vice versa. Calculate daily, weekly, and monthly earnings with overtime, paid time off, and benefits included.
Open ›🏠Rent Affordability Calculator
Calculate how much rent you can afford using the 30% rule. Get personalized recommendations based on your income, expenses, and budget with multiple percentage scenarios.
Open ›📉Inflation Calculator
See how inflation erodes your purchasing power over time. Calculate future money values, compare equivalent amounts across years, and understand real investment returns.
Open ›🎓Student Loan Payoff Calculator
Calculate your student loan payoff timeline and total interest. See how extra payments accelerate your debt-free date and save thousands in interest charges.
Open ›💿CD Calculator
Calculate certificate of deposit returns with different terms, rates, and compounding frequencies. Compare CD terms side-by-side to maximize your savings.
Open ›💰401k Withdrawal Calculator
Calculate taxes and penalties for early 401k withdrawal. See what you will actually receive after federal tax, state tax, and early withdrawal penalties with opportunity cost analysis.
Open ›💵Paycheck Calculator
Estimate your take-home pay after federal taxes, state taxes, Social Security, Medicare, and pre-tax deductions. Uses 2024 tax brackets for accurate results.
Open ›🔥FIRE Calculator
Calculate when you can achieve Financial Independence and Retire Early. See your FIRE number, years to FI, and detailed projections using the 4% rule with multiple scenarios.
Open ›📊Stock Portfolio Calculator
Analyze your investment portfolio allocation, calculate expected returns, track diversification, and get rebalancing recommendations. Optimize your asset mix for long-term growth.
Open ›💵Personal Loan Calculator
Calculate monthly payments, total interest, and compare different loan terms for personal loans. See how loan amount, APR, and term length affect your payment.
Open ›📅Amortization Schedule Calculator
Generate a detailed loan amortization schedule showing principal, interest, and remaining balance for each payment. See exactly how your loan will be paid off over time.
Open ›🚗Lease Payment Calculator
Calculate monthly car lease payments using MSRP, residual value, money factor, and down payment. Compare lease vs buy options and understand lease terms.
Open ›💰Dividend Reinvestment Simulator
Simulate how dividend reinvestment (DRIP) compounds your portfolio. Track yield on cost, compare DRIP vs cash, and project future dividend income over time.
Open ›Real Estate
Rent vs Buy Calculator
Compare the true cost of renting vs buying a home over time. Side-by-side net worth projections, break-even analysis, and monthly cost breakdowns with investment opportunity cost.
Open ›🏡Home Affordability Calculator
How much house can you afford? Uses the 28/36 DTI rule with your income, debts, and down payment. Includes rate sensitivity analysis and PITI payment breakdown.
Open ›🏡Down Payment Calculator
Plan your home purchase by comparing 5%, 10%, 15%, and 20% down payment scenarios. Estimate PMI costs and see how long it takes to save your target amount.
Open ›🏡Airbnb Profit Estimator
Estimate your Airbnb rental profits with detailed expense tracking, occupancy modeling, cleaning cost analysis, and cash-on-cash ROI for short-term rentals.
Open ›🏘️Rental Property ROI Calculator
Analyze rental property investments with cash flow, cap rate, cash-on-cash return, expense breakdown, and 30-year ROI projections including appreciation and equity.
Open ›Business
Profit Margin Calculator
Calculate gross margin, markup, and profit per unit with visual breakdowns. Includes break-even analysis, volume scaling, and a margin vs markup reference table.
Open ›💻Freelance Rate Calculator
Find your ideal freelance hourly rate. Factors in self-employment tax, health insurance, retirement, expenses, and billable hours to match your desired take-home pay.
Open ›📊ROI Calculator
Calculate return on investment (ROI) for any investment or business decision. See ROI percentage, net profit, and annualized returns with visual breakdowns.
Open ›⚖️Break-Even Analysis Calculator
Calculate your break-even point in units and revenue. Determine how many sales needed to cover fixed and variable costs with visual profitability charts.
Open ›💼Side Hustle Profit Simulator
Simulate your side hustle profits with a 12-month projection. See break-even month, tax estimates, growth modeling, and effective hourly rate with shareable results.
Open ›🛒eBay Fee Calculator
Calculate eBay, Poshmark, Mercari, and Facebook Marketplace fees. See net profit, ROI, break-even price, and a visual cost breakdown for any resale item.
Open ›💲Markup Calculator
Find the selling price from cost and desired markup %, or reverse-engineer markup from cost and price. See markup vs. margin side-by-side with visual breakdown.
Open ›📊Operating Expense Budget Calculator
Track and categorize your business operating expenses. Calculate monthly and annual costs with visual breakdowns, expense ratios, and detailed P&L analysis.
Open ›💰Gross vs Net Profit Calculator
Calculate gross profit, net profit, and all profit margins with waterfall visualization. See complete P&L from revenue to bottom line with visual flow chart.
Open ›📈Revenue Forecast Calculator
Project future revenue with linear and exponential growth models. See month-by-month projections with visual charts and compare multiple growth scenarios.
Open ›🎯Customer Acquisition Cost Calculator
Calculate CAC, LTV, LTV:CAC ratio, and payback period. Analyze customer acquisition economics and marketing ROI with comprehensive visual breakdowns.
Open ›Math
Percentage Calculator
Three calculators in one: "What is X% of Y?", "X is what % of Y?", and "% change from X to Y." Step-by-step formula breakdowns with visual bars.
Open ›🎓GPA Calculator
Calculate your semester and cumulative GPA on a 4.0 scale. Add courses with grades and credits, see visual breakdowns, and determine your academic standing.
Open ›Conversion
Unit Converter
Convert length, weight, volume, and temperature instantly. Two-way conversion with visual comparison bars, common quick-reference conversions, and all-units table.
Open ›💱Currency Converter
Convert between 22+ world currencies instantly with exchange rates. USD, EUR, GBP, JPY and more with popular pairs and quick reference.
Open ›⏱️Time Converter
Convert time units from nanoseconds to centuries. Includes duration breakdown and common conversions for seconds, minutes, hours, days, and more.
Open ›🚀Speed Converter
Convert speed units: mph to km/h, knots, m/s, Mach, and more. Includes common speed references from walking to supersonic flight.
Open ›💾Data Storage Converter
Convert data storage units: bytes, KB, MB, GB, TB. Includes binary (KiB, GiB) and bits. Common storage sizes for files and devices.
Open ›Lifestyle
Age Calculator
Enter your birthdate and see exact age in years, months, days, and hours. Plus fun facts like heartbeats, breaths, zodiac sign, and next milestone birthday.
Open ›📅Date Difference Calculator
Calculate the exact time between two dates in years, months, weeks, days, hours, and minutes. Perfect for event planning, milestone tracking, and countdowns.
Open ›🌍Time Zone Converter
Convert time between time zones instantly. Schedule international meetings and coordinate remote teams with visual time zone comparison.
Open ›😴Sleep Calculator
Calculate optimal sleep and wake times based on 90-minute sleep cycles. Wake up refreshed by timing your alarm to natural sleep rhythms.
Open ›⚡Electricity Cost Calculator
Estimate electricity costs for any appliance. Enter wattage, usage hours, and your rate to see daily, monthly, and yearly energy costs with comparison charts.
Open ›Health
Due Date Calculator
Enter your last period or conception date to get your estimated due date. Trimester timeline visualization with key milestones and week-by-week progress.
Open ›🥗Macro Calculator
Calculate daily calories and protein/carbs/fat breakdown based on your age, weight, height, activity level, and goals. Visual pie chart with meal-by-meal suggestions.
Open ›💧Water Intake Calculator
Calculate your daily water intake needs based on weight, activity level, and climate. Get personalized hydration goals with visual tracking.
Open ›⚖️BMI Calculator
Free body mass index calculator with imperial and metric support. Instantly see your BMI category, healthy weight range, and a visual color gauge.
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