Calculators
Free online calculators for finance, health, math, and lifestyle. From mortgage and loan calculators to BMI and calorie counters -- get instant, accurate results.
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BMI Calculator
Calculate your Body Mass Index with visual BMI scale
Use tool →Loan Calculator
Calculate monthly payments, interest, and amortization schedules
Use tool →Compound Interest Calculator
Calculate compound interest with contributions and visual growth chart
Use tool →Tip Calculator
Calculate tips, split bills, and round totals with tipping guide
Use tool →Mortgage Calculator
Calculate mortgage payments with taxes, insurance, PMI, and amortization
Use tool →Calorie Calculator
Calculate daily calories (TDEE/BMR) with macro breakdowns for your goals
Use tool →Salary Calculator
Convert salary between hourly, weekly, monthly, and annual with tax estimates
Use tool →Discount Calculator
Calculate sale prices, savings, and stack multiple discounts
Use tool →GPA Calculator
Calculate semester and cumulative GPA with course management
Use tool →Fuel Cost Calculator
Calculate trip fuel costs, annual expenses, and CO2 emissions
Use tool →Square Footage Calculator
Calculate area for rectangles, circles, triangles, and rooms with cost estimates
Use tool →Income Tax Calculator
Estimate US federal income tax with brackets, FICA, and take-home pay
Use tool →Retirement Calculator
Estimate retirement savings, income, and how much to save monthly
Use tool →Hourly to Salary Calculator
Convert hourly wage to annual salary with tax estimates and overtime
Use tool →Electricity Cost Calculator
Calculate electricity costs for appliances with daily, monthly, and yearly estimates
Use tool →Savings Goal Calculator
Calculate how long to reach your savings goal or how much to save monthly
Use tool →Pregnancy Due Date Calculator
Calculate pregnancy due date, trimester timeline, and development milestones
Use tool →Grade Calculator
Calculate weighted grades, GPA, and what you need on finals
Use tool →Paycheck Calculator
Calculate take-home pay with federal tax, FICA, state tax, and deductions
Use tool →Running Pace Calculator
Calculate running pace, finish time, or distance with split times
Use tool →ROI Calculator
Calculate return on investment, annualized ROI, and compare investments
Use tool →Auto Loan Calculator
Calculate monthly car payments, total interest, and amortization
Use tool →Debt Payoff Calculator
Calculate how long to pay off debt with avalanche or snowball strategies
Use tool →Body Fat Calculator
Estimate body fat percentage using the US Navy method and BMI formula
Use tool →Net Worth Calculator
Calculate your total net worth from assets minus liabilities
Use tool →Inflation Calculator
Calculate how inflation affects purchasing power over time
Use tool →BAC Calculator
Estimate blood alcohol content based on drinks, weight, and time
Use tool →Scientific Calculator
Full-featured scientific calculator with trig, log, and memory functions
Use tool →Investment Calculator
Calculate investment growth with monthly contributions and dividends
Use tool →Tax Bracket Calculator
See which tax brackets your income falls into with effective rate
Use tool →Water Intake Calculator
Calculate your recommended daily water intake based on weight and activity
Use tool →Due Date Calculator
Calculate pregnancy due date or project deadline with timeline
Use tool →Rent Affordability Calculator
Determine how much rent you can afford based on income
Use tool →Macro Calculator
Calculate daily protein, carbs, and fat needs for your fitness goal
Use tool →CAGR Calculator
Calculate compound annual growth rate for investments
Use tool →Profit Margin Calculator
Calculate gross and net profit margins with markup comparison
Use tool →Ideal Weight Calculator
Calculate ideal body weight using Devine, Robinson, Miller, and Hamwi formulas
Use tool →Wedding Budget Calculator
Plan your wedding budget with category allocations, per-guest costs, and expense tracking
Use tool →Dog Age Calculator
Convert your dog's age to human years using the latest veterinary science formulas
Use tool →Car Affordability Calculator
Find out how much car you can afford based on your income, expenses, and credit score
Use tool →Student Loan Calculator
Calculate student loan payments with Standard, Graduated, and Income-Driven repayment plans
Use tool →Carbon Footprint Calculator
Calculate your annual carbon footprint from transportation, home energy, diet, and consumption
Use tool →Moving Cost Calculator
Estimate your moving costs with DIY, hybrid, and full-service comparisons plus a moving checklist
Use tool →Party Food Calculator
Calculate exactly how much food and drinks you need for your party based on guests and duration
Use tool →Stock Return Calculator
Calculate stock investment returns including dividends, capital gains, and after-tax performance
Use tool →Home Affordability Calculator
Calculate how much house you can afford based on income, debts, and down payment using the 28/36 rule
Use tool →Business Loan Calculator
Calculate business loan payments for Term Loans, SBA 7(a), Lines of Credit, and Equipment Financing
Use tool →401(k) Calculator
Project your 401(k) retirement savings with employer matching, catch-up contributions, and growth analysis
Use tool →Protein Calculator
Calculate your optimal daily protein intake based on weight, activity level, and fitness goals
Use tool →Rent vs Buy Calculator
Compare the financial impact of renting vs buying a home over time with net worth projections
Use tool →Heart Rate Zone Calculator
Calculate your target heart rate zones for optimal training using the Karvonen formula
Use tool →Tax Withholding Calculator
Calculate federal tax withholding per paycheck and estimate your refund or amount owed
Use tool →EMI Calculator
Calculate Equated Monthly Installments for any loan with amortization schedule and prepayment analysis
Use tool →Payroll Tax Calculator
Calculate federal, state, Social Security, and Medicare taxes with detailed net pay breakdown
Use tool →Savings Interest Calculator
Calculate savings account growth with compound interest, APY comparison, and inflation-adjusted projections
Use tool →Property Tax Calculator
Calculate property taxes with exemptions and multi-year projections
Use tool →Sales Tax Calculator
Calculate sales tax for any US state with multi-item and reverse modes
Use tool →DCA Calculator
Calculate dollar-cost averaging returns with DCA vs lump sum comparison
Use tool →One Rep Max Calculator
Calculate your one-rep max using 7 proven strength formulas
Use tool →Credit Score Simulator
Simulate how financial actions like paying debt or opening accounts affect your credit score
Use tool →Amortization Calculator
Generate detailed loan amortization schedules showing principal, interest, and balance for each payment
Use tool →Debt-to-Income Calculator
Calculate your debt-to-income ratio to understand your borrowing capacity and financial health
Use tool →Down Payment Calculator
Calculate how much to save for a down payment and see how it affects your mortgage payments and PMI
Use tool →APR Calculator
Calculate the true Annual Percentage Rate including fees, points, and closing costs for any loan
Use tool →Break-Even Calculator
Calculate the break-even point for your business showing units needed and revenue required to cover costs
Use tool →Social Security Calculator
Estimate your Social Security retirement benefits based on earnings history and claiming age
Use tool →CD Calculator
Calculate Certificate of Deposit returns with compound interest and compare CD laddering strategies
Use tool →Crypto Profit Calculator
Calculate cryptocurrency investment returns, profits, and ROI including fees and tax estimates
Use tool →TDEE Calculator
Calculate your Total Daily Energy Expenditure based on BMR, activity level, and body composition
Use tool →Blood Pressure Calculator
Track and categorize blood pressure readings with averages, trends, and health risk indicators
Use tool →Ovulation Calculator
Track your fertile window and ovulation date based on your menstrual cycle for family planning
Use tool →Pregnancy Weight Gain Calculator
Track recommended pregnancy weight gain by trimester based on pre-pregnancy BMI guidelines
Use tool →Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio and assess your health risk level for cardiovascular disease
Use tool →Fraction Calculator
Add, subtract, multiply, and divide fractions with step-by-step solutions and simplification
Use tool →Matrix Calculator
Perform matrix operations including addition, multiplication, determinant, inverse, and transpose
Use tool →Binary Calculator
Perform binary arithmetic operations and convert between binary, decimal, octal, and hexadecimal
Use tool →Net Income Calculator
Calculate your net income after federal, state, and local taxes with detailed deduction breakdown
Use tool →Margin Calculator
Calculate profit margin, markup, and selling price with batch analysis and industry benchmarks
Use tool →Payoff Calculator
Calculate how fast you can pay off debt with extra payments and see total interest savings
Use tool →Conversion Rate Calculator
Calculate website conversion rates, run A/B test analysis, and project revenue growth
Use tool →Electricity Usage Calculator
Calculate electricity costs by appliance with presets for 38 common devices and energy saving tips
Use tool →Stock Screener
Screen 50 stocks by fundamentals, track your portfolio, and learn investment strategies
Use tool →Lease Calculator
Calculate car and equipment lease payments with lease vs buy comparison
Use tool →Tip Split Calculator
Calculate tips and split bills between groups with rounding and tax options
Use tool →Paint Calculator
Calculate paint needed for rooms with coverage estimates and cost breakdown
Use tool →Concrete Calculator
Calculate concrete volume in cubic yards for slabs, columns, and walls with bag estimates
Use tool →Fence Calculator
Calculate fence materials and costs for privacy, picket, split rail, and chain link fences
Use tool →Tile Calculator
Calculate tiles needed for floors and walls with waste factor and pattern adjustments
Use tool →Mulch Calculator
Calculate mulch needed in cubic yards and bags with bulk vs bag cost comparison
Use tool →Soil Calculator
Calculate soil volume for garden beds and raised beds with mix recommendations
Use tool →Wedding Guest Calculator
Track wedding RSVPs, meal selections, table assignments, and per-guest budget
Use tool →Pool Volume Calculator
Calculate pool water volume in gallons for chemical dosing, fill time, and cost estimates
Use tool →Lawn Care Calculator
Calculate fertilizer, seed, and water needs for your lawn based on size and grass type
Use tool →Firewood Calculator
Calculate cords of firewood needed for winter heating with BTU estimates and cost comparison
Use tool →Wallpaper Calculator
Calculate wallpaper rolls needed with pattern repeat waste and cost estimates
Use tool →Deck Cost Calculator
Estimate deck building costs with materials, features, and labor breakdown
Use tool →Moving Budget Calculator
Calculate moving costs with professional vs DIY comparison and supply estimates
Use tool →Pet Food Calculator
Calculate daily pet food portions for dogs and cats based on weight, age, and activity
Use tool →Rain Barrel Calculator
Calculate rainwater collection potential from roof area with savings and garden coverage
Use tool →Gravel Calculator
Calculate gravel needed in tons and cubic yards for driveways, paths, and landscaping
Use tool →Stair Calculator
Calculate stair dimensions per building code with riser height, tread depth, and stringer length
Use tool →Brick Calculator
Calculate bricks needed for walls, patios, and columns with mortar and cost estimates
Use tool →Insulation Calculator
Calculate insulation needs by R-value with material comparison and energy savings estimates
Use tool →Gutter Calculator
Calculate gutter materials, downspouts, and accessories with cost estimates by material
Use tool →Drywall Calculator
Calculate drywall sheets, joint compound, tape, and screws needed for walls and ceilings
Use tool →Flooring Calculator
Calculate flooring materials for hardwood, laminate, tile, vinyl, and carpet with cost estimates
Use tool →Window Cost Calculator
Estimate window replacement costs by type, frame material, glass, and size
Use tool →HVAC Calculator
Calculate HVAC system sizing (BTU/tonnage) and cost by climate zone and home size
Use tool →Solar Panel Calculator
Estimate solar panel system size, cost, savings, and payback period for your home
Use tool →Water Heater Calculator
Calculate water heater sizing and compare 6 types by operating cost and 10-year ownership cost
Use tool →Fence Paint Calculator
Calculate paint and stain needed for fences with coverage rates and cost estimates
Use tool →Roof Calculator
Calculate roofing materials, squares, and cost by material type and roof pitch
Use tool →Siding Calculator
Calculate siding materials for house exterior with 6 material options and cost comparison
Use tool →Carpet Calculator
Calculate carpet for multiple rooms with roll width optimization and padding costs
Use tool →Kitchen Remodel Calculator
Estimate kitchen renovation costs with scope selection and ROI analysis
Use tool →Bathroom Remodel Calculator
Estimate bathroom renovation costs by size, scope, and remodel level with ROI analysis
Use tool →Tire Size Calculator
Compare tire sizes with diameter difference, speedometer error, and clearance changes
Use tool →Gas Mileage Calculator
Calculate fuel costs, MPG, and annual gas expenses with EV cost comparison
Use tool →College Savings Calculator
Calculate 529 plan savings needed for college with growth projections and gap analysis
Use tool →Home Equity Calculator
Calculate home equity, HELOC borrowing power, and loan payment estimates
Use tool →Asphalt Calculator
Calculate asphalt tonnage and cost for driveways and parking lots
Use tool →Pool Chemical Calculator
Calculate pool chemical dosages for chlorine, pH, alkalinity, and CYA adjustments
Use tool →Land Clearing Calculator
Estimate land clearing costs by acreage, terrain type, and vegetation density.
Use tool →Concrete Slab Calculator
Calculate concrete volume, bags needed, and project cost for slabs and pads.
Use tool →Home Insurance Calculator
Estimate annual homeowners insurance premium based on home value and coverage.
Use tool →Paint Room Calculator
Calculate how much paint you need for a room including walls, ceiling, and supplies.
Use tool →Electric Car Savings Calculator
Compare EV vs gas car fuel costs and see annual savings with CO2 reduction.
Use tool →RV Loan Calculator
Calculate monthly RV loan payments with term comparison and total interest.
Use tool →Boat Loan Calculator
Calculate boat loan payments and total ownership costs including insurance and storage.
Use tool →Fence Cost Calculator
Estimate fence installation cost by type, length, height, and number of gates.
Use tool →Lawn Mowing Calculator
Calculate lawn mowing time and cost with DIY vs professional comparison.
Use tool →Appliance Energy Calculator
Calculate energy costs for household appliances with daily, monthly, and annual estimates.
Use tool →Credit Card Payoff Calculator
Calculate how long to pay off credit card debt and how much interest you'll pay
Use tool →Stamp Duty Calculator
Calculate real estate transfer taxes, title insurance, and closing costs by state
Use tool →Health Insurance Calculator
Compare health insurance plan costs and find the best option
Use tool →Car Insurance Calculator
Estimate car insurance premiums by driver profile and coverage
Use tool →Renters Insurance Calculator
Calculate renters insurance coverage needs and monthly cost
Use tool →Alimony Calculator
Estimate spousal support payments and duration
Use tool →Divorce Settlement Calculator
Calculate fair asset division in a divorce
Use tool →Personal Injury Calculator
Estimate personal injury settlement value
Use tool →Cap Rate Calculator
Calculate capitalization rate for real estate investments
Use tool →Rental Yield Calculator
Calculate gross and net rental yield on investment property
Use tool →House Flip Calculator
Calculate profit and ROI on a house flip project
Use tool →Airbnb Calculator
Estimate Airbnb rental income and profitability
Use tool →Debt Consolidation Calculator
Compare current debts vs a consolidation loan
Use tool →Balance Transfer Calculator
Calculate savings from a credit card balance transfer
Use tool →HELOC Calculator
Calculate home equity line of credit payments and limits
Use tool →Personal Loan Calculator
Calculate personal loan payments and total interest
Use tool →Capital Gains Calculator
Calculate capital gains tax on investments and property
Use tool →Self-Employment Tax Calculator
Calculate self-employment tax and quarterly estimated payments
Use tool →Estate Tax Calculator
Estimate federal and state estate tax on an inheritance
Use tool →Crypto Tax Calculator
Calculate cryptocurrency taxes on trades and transactions
Use tool →Freelance Rate Calculator
Calculate your ideal freelance hourly and project rates
Use tool →SaaS Metrics Calculator
Calculate key SaaS business metrics: MRR, ARR, LTV, CAC
Use tool →Annuity Calculator
Calculate annuity growth and payout projections for accumulation and distribution phases
Use tool →Child Support Calculator
Estimate child support payments using income shares and percentage of income models
Use tool →Closing Cost Calculator
Estimate home closing costs by state including lender fees, title insurance, and prepaid items
Use tool →Keto Calculator
Calculate personalized keto macros for fat, protein, and net carbs based on your goals and activity level
Use tool →Life Insurance Calculator
Calculate life insurance coverage needs based on income, debts, dependents, and existing assets
Use tool →Refinance Calculator
Compare current vs refinanced mortgage payments, total savings, and break-even point for closing costs
Use tool →Startup Cost Calculator
Estimate startup costs by business type with categorized expenses, runway planning, and funding gap analysis
Use tool →FIRE Calculator
Calculate your Financial Independence, Retire Early (FIRE) number with Lean, Regular, and Fat FIRE variants, savings projections, and milestone timeline
Use tool →LLC vs S-Corp Calculator
Compare LLC vs S-Corp tax savings with side-by-side analysis, self-employment tax breakdown, and optimal salary sensitivity chart
Use tool →Amazon FBA Calculator
Calculate Amazon FBA fees, profit margins, and ROI across 15 product categories with size tier breakdowns and price sensitivity analysis
Use tool →Quarterly Tax Calculator
Calculate quarterly estimated tax payments with federal + state taxes, safe harbor rules, and payment deadlines for all 50 US states
Use tool →Cost of Living Calculator
Compare cost of living between 50+ US cities across housing, food, transportation, healthcare, and utilities with salary adjustment recommendations
Use tool →AI Token Calculator
Calculate AI API costs across 16+ models (GPT-4o, Claude, Gemini, Llama) with token estimation, batch pricing, and monthly budget projections
Use tool →Etsy Fee Calculator
Calculate Etsy seller fees including listing, transaction, payment processing, and offsite ad fees with profit margin analysis
Use tool →Roth IRA Conversion Calculator
Analyze Roth IRA conversion strategies with break-even year calculation, tax impact analysis, and optimal conversion amount recommendations
Use tool →Workers Comp Calculator
Estimate workers compensation insurance premiums by state with industry classification codes, experience modification rates, and coverage analysis
Use tool →Calories Burned Calculator
Calculate calories burned across 95+ activities organized in 9 categories using MET values, with heart rate zone estimation and weekly planning
Use tool →Dividend Calculator
Calculate dividend income with DRIP reinvestment, yield on cost tracking, dividend growth projections, and compound growth visualization
Use tool →Shopify Profit Calculator
Calculate Shopify store profitability across 4 plan tiers with payment processing fees, shipping costs, and break-even analysis
Use tool →Disability Benefits Calculator
Estimate SSDI (Social Security Disability Insurance) benefits using PIA formula with 2024 bend points, work credit eligibility, and family benefits
Use tool →eBay Fee Calculator
Calculate eBay seller fees across 14 categories and 5 store tiers including insertion, final value, promoted listings, and international fees
Use tool →Stock Options Calculator
Calculate stock option values for ISO, NSO, and RSU grants with AMT exposure analysis, vesting timeline, and exercise strategy comparison
Use tool →A1C Calculator
Convert between A1C and average blood sugar levels with color-coded diabetes risk ranges, reference charts, and bidirectional conversion
Use tool →Intermittent Fasting Calculator
Plan your intermittent fasting schedule with 6 protocols (16:8, 18:6, 20:4, OMAD, 5:2, ADF), eating window visualization, and macro targets
Use tool →Crypto Mining Calculator
Calculate cryptocurrency mining profitability for 5 coins (BTC, ETH, LTC, DOGE, XMR) with electricity costs, ROI timeline, and break-even analysis
Use tool →Business Valuation Calculator
Estimate business value using 3 methods: Revenue Multiple, EBITDA Multiple, and Discounted Cash Flow (DCF) with industry-specific multipliers
Use tool →IVF Cost Calculator
Estimate IVF treatment costs across 4 US regions with component breakdowns, multi-cycle projections, and insurance coverage analysis
Use tool →Frequently Asked Questions
What calculators are available on NexTool?▾
NexTool offers 40+ free calculators covering finance (mortgage, loan, compound interest, ROI), health (BMI, calorie, body fat), math (percentage, GPA), and lifestyle (tip, age, retirement). All calculations are instant and private.
How accurate are the financial calculators?▾
Our financial calculators use industry-standard formulas and up-to-date tax brackets. They provide reliable estimates for planning purposes, though we recommend consulting a financial advisor for major decisions.
Do I need to create an account to use the calculators?▾
No. All calculators are free to use with no sign-up, no login, and no data collection. Your calculations are processed entirely in your browser.