Calculators Lab

Fast online calculators for mortgages, loans, savings, investing, tax, business, health, time, conversions, and everyday math.

Calculator categories

Popular calculators

• Mortgage CalculatorEstimate principal, interest, taxes, insurance, payoff timing, and amortization.
• Mortgage Affordability CalculatorEstimate a comfortable home price from income, debts, down payment, and housing costs.
• Payment CalculatorEstimate a monthly payment from price, down payment, fees, rate, term, and extra payments.
• Debt-to-Income Ratio CalculatorCalculate front-end and back-end DTI from income, housing payment, and monthly debts.
• Loan CalculatorCompare monthly payment, total interest, and payoff cost for a fixed-rate loan.
• Loan Comparison CalculatorCompare two loan offers by payment, fees, interest, term, and total repayment cost.
• Compound Interest CalculatorProject savings growth with contributions, compounding, and long-term returns.
• Interest CalculatorCalculate simple or compound interest, ending balance, and total interest earned.
• Income Tax CalculatorEstimate take-home pay from income, deductions, credits, and custom tax rates.
• Paycheck CalculatorEstimate gross pay, deductions, taxes, and take-home pay for each paycheck.
• Take-Home Pay CalculatorEstimate annual, monthly, and per-paycheck take-home pay after taxes and deductions.
• Percentage CalculatorFind percentages, percentage change, and reverse percentage values.
• Fraction CalculatorAdd, subtract, multiply, divide, simplify, and convert fractions to decimals.
• Scientific CalculatorCalculate powers, roots, logarithms, trigonometry, and factorials.
• Calorie CalculatorEstimate BMR, maintenance calories, and daily calorie target from body stats and activity.
• Retirement CalculatorEstimate savings targets, retirement income, and contribution needs.

Finance, home, and money calculators

• Mortgage CalculatorEstimate principal, interest, taxes, insurance, payoff timing, and amortization.
• Mortgage Affordability CalculatorEstimate a comfortable home price from income, debts, down payment, and housing costs.
• Rent vs Buy CalculatorCompare renting with buying across monthly costs, equity, appreciation, and rent increases.
• Refinance CalculatorEstimate refinance payment, monthly savings, break-even time, and interest tradeoffs.
• Mortgage Extra Payment CalculatorEstimate interest saved and time saved from extra monthly or one-time mortgage payments.
• Mortgage Payoff CalculatorCalculate the payment needed to pay off a mortgage by a target date.
• Mortgage Recast CalculatorEstimate mortgage recast payment reduction, fee break-even, reserve impact, and payoff tradeoffs.
• Home Equity CalculatorEstimate home equity, loan-to-value, tappable equity, and sale proceeds.
• HELOC CalculatorEstimate HELOC interest-only payment, repayment payment, available credit, and total cost.
• PMI CalculatorEstimate monthly private mortgage insurance, total PMI, and time to cancellation threshold.
• Property Tax CalculatorEstimate annual and monthly property tax from home value, assessment, exemptions, and local tax rate.
• Home Insurance CalculatorEstimate home insurance premium, coverage gap, deductible exposure, and monthly housing impact.
• Homeownership Cost CalculatorEstimate the full monthly cost of owning a home beyond the mortgage payment.
• Home Maintenance Cost CalculatorEstimate a monthly home maintenance reserve from home value, age, size, and major repairs.
• Roof Replacement Cost CalculatorEstimate roof replacement cost from roof area, pitch, waste, materials, labor, tear-off, and contingency.
• HVAC Replacement Cost CalculatorEstimate HVAC replacement cost from system size, install rate, ductwork, electrical work, permits, rebates, and contingency.
• Water Heater Replacement Cost CalculatorEstimate water heater replacement cost from tank type, capacity, labor, plumbing, permits, rebates, and contingency.
• Plumbing Repair Cost CalculatorEstimate plumbing repair cost from service call fees, labor, parts, access work, emergency markup, contingency, insurance, and cash gap.
• Appliance Replacement Cost CalculatorEstimate appliance replacement cost and compare replacement with a repair quote, cash gap, and monthly replacement fund.
• Electrical Repair Cost CalculatorEstimate electrical repair cost from labor, materials, circuit work, permits, emergency markup, contingency, and cash gap.
• Closing Cost CalculatorEstimate home-buying closing costs, seller credits, down payment, and cash needed to close.
• Biweekly Mortgage CalculatorCompare monthly mortgage payments with a biweekly payment plan and estimate interest saved.
• Mortgage Escrow CalculatorEstimate monthly escrow deposits, shortage or surplus, reserve cushion, and total housing payment.
• Payment CalculatorEstimate a monthly payment from price, down payment, fees, rate, term, and extra payments.
• APR CalculatorEstimate the effective APR of a fixed loan after upfront fees, points, and payment terms.
• Debt-to-Income Ratio CalculatorCalculate front-end and back-end DTI from income, housing payment, and monthly debts.
• Loan CalculatorCompare monthly payment, total interest, and payoff cost for a fixed-rate loan.
• Loan Comparison CalculatorCompare two loan offers by payment, fees, interest, term, and total repayment cost.
• Loan Payoff CalculatorEstimate current payoff time, target payment, extra payment needed, and interest saved.
• Loan Extra Payment CalculatorCompare regular payoff with extra monthly and one-time principal payment scenarios.
• Debt Consolidation CalculatorCompare current debt payoff with a consolidation loan after fees, rate, and term.
• Credit Utilization CalculatorCalculate current and projected credit utilization plus payment needed for a target ratio.
• Payday Loan CalculatorEstimate payday loan fees, APR-equivalent cost, rollover charges, and paycheck pressure.
• Personal Loan CalculatorEstimate personal loan payment, fees, cash received, interest, and payoff time.
• Student Loan CalculatorEstimate student loan payment, capitalization, payoff time, interest, and extra payment savings.
• Student Loan Refinance CalculatorCompare current student loan payoff with a refinance offer by payment, fees, term, and total cost.
• Student Loan Payoff CalculatorEstimate target student loan payoff payment, extra payment needed, interest saved, and capitalized interest impact.
• Compound Interest CalculatorProject savings growth with contributions, compounding, and long-term returns.
• Auto Loan CalculatorModel car payments, down payment, trade-in value, taxes, and total loan cost.
• Auto Loan Affordability CalculatorEstimate affordable vehicle price from payment budget, APR, term, down payment, tax, fees, and trade-in.
• Interest CalculatorCalculate simple or compound interest, ending balance, and total interest earned.
• Amortization CalculatorBuild a loan amortization schedule with payment, interest, principal, and balance.
• Savings CalculatorEstimate savings growth, monthly contributions, and progress toward a target.
• Savings Goal CalculatorEstimate how long it will take to reach a savings goal from current savings and monthly deposits.
• Emergency Fund CalculatorEstimate an emergency fund target, months of coverage, remaining gap, and time to build the buffer.
• Budget CalculatorBuild a monthly budget from income, essential spending, debt payments, savings, and other costs.
• Margin CalculatorCalculate gross margin, markup, profit per unit, revenue, and gross profit from price and cost.
• Markup CalculatorCalculate selling price, profit, effective margin, and total profit from cost and markup.
• Break-even CalculatorEstimate break-even units, break-even revenue, contribution margin, and target-profit volume.
• Net Worth CalculatorCalculate net worth from assets, liabilities, home equity, liquid assets, and debt levels.
• FIRE CalculatorEstimate financial independence target, time to FIRE, savings rate, and portfolio gap.
• 401k CalculatorProject 401k balance from salary, contributions, employer match, return, and timeline.
• CD CalculatorEstimate certificate of deposit maturity value, interest earned, and early withdrawal penalty.
• Investment CalculatorProject investment growth, contributions, gains, and inflation-adjusted value.
• Dividend CalculatorEstimate dividend income, dividend growth, reinvestment, and projected portfolio value.
• ROI CalculatorCalculate return on investment, annualized return, net gain, and return multiple.
• Roth IRA CalculatorProject Roth IRA balance, contributions, and growth from annual contribution assumptions.
• Future Value CalculatorCalculate future value from present value, monthly contributions, return rate, and timeline.
• Present Value CalculatorEstimate how much money is needed today to reach a future target with planned contributions.
• Rule of 72 CalculatorEstimate doubling time and target growth using the Rule of 72 and exact compound math.
• Down Payment CalculatorEstimate down payment, loan amount, loan-to-value, closing costs, and cash needed to buy a home.
• Mortgage Points CalculatorEstimate mortgage points cost, monthly savings, break-even time, and net savings over a holding period.
• ARM Mortgage CalculatorEstimate adjustable-rate mortgage payment changes after the fixed period using rate cap assumptions.
• Credit Card Payoff CalculatorEstimate payoff time, interest cost, and payment needed for credit card debt.
• Credit Card Minimum Payment CalculatorEstimate payoff time, interest cost, and fixed-payment savings from credit card minimum payments.
• Balance Transfer CalculatorCompare a balance transfer offer with your current card after fee, promo APR, and payoff timing.
• Credit Card Interest CalculatorEstimate daily interest, billing-cycle interest, and payment impact from card balance and APR.
• Credit Card Payment CalculatorCalculate the payment needed to pay off credit card debt by a target month.
• Debt Payoff CalculatorPlan payoff speed, interest saved, and snowball or avalanche strategies.
• Discount CalculatorCalculate sale price, discount amount, and final price after tax.
• Sales Tax CalculatorCalculate tax amount, pre-tax price, and final price from a sales tax rate.
• Tip CalculatorCalculate tip amount, total bill, tax or fees, and per-person split.
• Inflation CalculatorEstimate future value or purchasing power after inflation.
• Retirement CalculatorEstimate savings targets, retirement income, and contribution needs.

Everyday calculators and converters

• Income Tax CalculatorEstimate take-home pay from income, deductions, credits, and custom tax rates.
• Paycheck CalculatorEstimate gross pay, deductions, taxes, and take-home pay for each paycheck.
• Take-Home Pay CalculatorEstimate annual, monthly, and per-paycheck take-home pay after taxes and deductions.
• Bonus Tax CalculatorEstimate net bonus pay after withholding, payroll contributions, retirement contributions, and deductions.
• Overtime CalculatorCalculate overtime pay, weekly gross pay, annual overtime income, and effective hourly rate.
• Freelance Rate CalculatorEstimate a minimum freelance hourly rate from income target, expenses, tax reserve, and billable hours.
• Percentage CalculatorFind percentages, percentage change, and reverse percentage values.
• Fraction CalculatorAdd, subtract, multiply, divide, simplify, and convert fractions to decimals.
• Scientific CalculatorCalculate powers, roots, logarithms, trigonometry, and factorials.
• Average CalculatorCalculate average, median, sum, count, minimum, maximum, and range from a number list.
• Standard Deviation CalculatorCalculate sample and population standard deviation, variance, mean, and count.
• Grade CalculatorCalculate current grade, target score needed, and letter grade from points earned.
• GPA CalculatorCalculate weighted GPA from course grades, credits, and quality points.
• BMI CalculatorEstimate body mass index from height and weight with standard BMI categories.
• Calorie CalculatorEstimate BMR, maintenance calories, and daily calorie target from body stats and activity.
• Macro CalculatorEstimate daily protein, fat, and carb targets from calories, body weight, and macro assumptions.
• Pregnancy Due Date CalculatorEstimate pregnancy due date, conception date, trimester milestones, and days until due.
• Age CalculatorCalculate age in years, months, and days from a date of birth.
• Date Difference CalculatorFind days, weeks, months, and years between two dates.
• Days From Today CalculatorFind the date a number of days before or after today or any start date.
• Time Duration CalculatorCalculate elapsed time, break-adjusted duration, decimal hours, and total minutes.
• Salary CalculatorConvert hourly, weekly, monthly, and annual pay with work-hour assumptions.
• Length ConverterConvert between meters, kilometers, feet, inches, yards, and miles.
• Area ConverterConvert between square meters, square feet, acres, hectares, and other area units.
• Weight ConverterConvert between kilograms, grams, pounds, ounces, and stones.
• Volume ConverterConvert between liters, milliliters, cubic units, gallons, quarts, and cups.
• Speed ConverterConvert between kilometers per hour, miles per hour, meters per second, feet per second, and knots.
• Data Storage ConverterConvert bytes, KB, MB, GB, TB, KiB, MiB, GiB, and TiB for file sizes and storage.
• Fuel Economy ConverterConvert fuel economy between MPG, liters per 100 km, and kilometers per liter.
• Cooking Measurement ConverterConvert recipe measurements between milliliters, teaspoons, tablespoons, cups, pints, and quarts.
• Temperature ConverterConvert Celsius, Fahrenheit, and Kelvin temperatures.