{ "version": "https://jsonfeed.org/version/1.1", "title": "The Handy Calculators — Updated Recently", "home_page_url": "https://thehandycalculators.com/updates", "feed_url": "https://thehandycalculators.com/feed.json", "description": "New and updated free calculators on The Handy Calculators — money, time, health, education, conversions, home, and real estate.", "language": "en-US", "authors": [ { "name": "The Handy Calculators", "url": "https://thehandycalculators.com" } ], "items": [ { "id": "https://thehandycalculators.com/1031-exchange", "url": "https://thehandycalculators.com/1031-exchange", "title": "1031 Exchange Calculator", "content_text": "Deferred gain, recognized boot from cash and debt relief, federal tax owed, and carryover basis on a like-kind real estate exchange.", "summary": "Deferred gain, recognized boot from cash and debt relief, federal tax owed, and carryover basis on a like-kind real estate exchange.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Real Estate" ] }, { "id": "https://thehandycalculators.com/retirement", "url": "https://thehandycalculators.com/retirement", "title": "401k & Retirement", "content_text": "Project your retirement balance with employer match and growth.", "summary": "Project your retirement balance with employer match and growth.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Money" ] }, { "id": "https://thehandycalculators.com/seventy-percent-rule", "url": "https://thehandycalculators.com/seventy-percent-rule", "title": "70% Rule Calculator", "content_text": "Maximum offer for a flip — 70% of ARV minus repairs, with adjustable spread for any market.", "summary": "Maximum offer for a flip — 70% of ARV minus repairs, with adjustable spread for any market.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Real Estate" ] }, { "id": "https://thehandycalculators.com/add-subtract-days", "url": "https://thehandycalculators.com/add-subtract-days", "title": "Add or Subtract Days", "content_text": "Add or subtract days, weeks, months, years, or business days from any date.", "summary": "Add or subtract days, weeks, months, years, or business days from any date.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Time" ] }, { "id": "https://thehandycalculators.com/age", "url": "https://thehandycalculators.com/age", "title": "Age Calculator", "content_text": "Your exact age in years, months, days, hours, and minutes.", "summary": "Your exact age in years, months, days, hours, and minutes.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Time" ] }, { "id": "https://thehandycalculators.com/apr-vs-apy", "url": "https://thehandycalculators.com/apr-vs-apy", "title": "APR vs APY Converter", "content_text": "Convert between APR and APY for any compounding frequency.", "summary": "Convert between APR and APY for any compounding frequency.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Money" ] }, { "id": "https://thehandycalculators.com/bmi", "url": "https://thehandycalculators.com/bmi", "title": "BMI Calculator", "content_text": "Body mass index in metric or US units, with category.", "summary": "Body mass index in metric or US units, with category.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Health" ] }, { "id": "https://thehandycalculators.com/bmr", "url": "https://thehandycalculators.com/bmr", "title": "BMR Calculator", "content_text": "Basal metabolic rate using Mifflin-St Jeor and Harris-Benedict, with activity-multiplier TDEE.", "summary": "Basal metabolic rate using Mifflin-St Jeor and Harris-Benedict, with activity-multiplier TDEE.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Health" ] }, { "id": "https://thehandycalculators.com/body-fat", "url": "https://thehandycalculators.com/body-fat", "title": "Body Fat Calculator", "content_text": "Estimate body fat percent with the US Navy circumference method, plus a BMI-based check.", "summary": "Estimate body fat percent with the US Navy circumference method, plus a BMI-based check.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Health" ] }, { "id": "https://thehandycalculators.com/body-roundness", "url": "https://thehandycalculators.com/body-roundness", "title": "Body Roundness Index (BRI)", "content_text": "Models the body as an ellipse from waist and height — predicts mortality risk better than BMI.", "summary": "Models the body as an ellipse from waist and height — predicts mortality risk better than BMI.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Health" ] }, { "id": "https://thehandycalculators.com/business-days", "url": "https://thehandycalculators.com/business-days", "title": "Business Days Calculator", "content_text": "Count business days between two dates or add/subtract working days from any date, with custom holidays excluded.", "summary": "Count business days between two dates or add/subtract working days from any date, with custom holidays excluded.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Time" ] }, { "id": "https://thehandycalculators.com/calorie", "url": "https://thehandycalculators.com/calorie", "title": "Calorie Calculator (TDEE)", "content_text": "Daily calories to lose, maintain, or gain weight using Mifflin-St Jeor.", "summary": "Daily calories to lose, maintain, or gain weight using Mifflin-St Jeor.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Health" ] }, { "id": "https://thehandycalculators.com/cap-rate", "url": "https://thehandycalculators.com/cap-rate", "title": "Cap Rate Calculator", "content_text": "Capitalization rate from NOI and value, or solve for value, NOI, or required cap rate.", "summary": "Capitalization rate from NOI and value, or solve for value, NOI, or required cap rate.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Real Estate" ] }, { "id": "https://thehandycalculators.com/car-payment", "url": "https://thehandycalculators.com/car-payment", "title": "Car Payment Calculator", "content_text": "Monthly car payment including tax, trade-in, and down payment.", "summary": "Monthly car payment including tax, trade-in, and down payment.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Money" ] }, { "id": "https://thehandycalculators.com/cash-on-cash", "url": "https://thehandycalculators.com/cash-on-cash", "title": "Cash-on-Cash Return", "content_text": "Annual cash flow divided by cash invested — the levered return on a rental property.", "summary": "Annual cash flow divided by cash invested — the levered return on a rental property.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Real Estate" ] }, { "id": "https://thehandycalculators.com/closing-costs", "url": "https://thehandycalculators.com/closing-costs", "title": "Closing Costs Estimator", "content_text": "Buyer closing-cost breakdown by line item — lender, title, government, prepaids — plus cash-to-close.", "summary": "Buyer closing-cost breakdown by line item — lender, title, government, prepaids — plus cash-to-close.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Real Estate" ] }, { "id": "https://thehandycalculators.com/compound-interest", "url": "https://thehandycalculators.com/compound-interest", "title": "Compound Interest", "content_text": "Project your investment growth over years or decades.", "summary": "Project your investment growth over years or decades.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Money" ] }, { "id": "https://thehandycalculators.com/concrete", "url": "https://thehandycalculators.com/concrete", "title": "Concrete Calculator", "content_text": "Cubic yards needed for slabs, driveways, and patios — plus bags and cost.", "summary": "Cubic yards needed for slabs, driveways, and patios — plus bags and cost.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Home" ] }, { "id": "https://thehandycalculators.com/cooking-converter", "url": "https://thehandycalculators.com/cooking-converter", "title": "Cooking Conversions", "content_text": "Cups, tablespoons, grams, ounces, and milliliters — plus oven temperature conversions.", "summary": "Cups, tablespoons, grams, ounces, and milliliters — plus oven temperature conversions.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Conversions" ] }, { "id": "https://thehandycalculators.com/cost-of-living", "url": "https://thehandycalculators.com/cost-of-living", "title": "Cost of Living Comparison", "content_text": "Salary you need in another city to maintain the same standard of living.", "summary": "Salary you need in another city to maintain the same standard of living.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Money" ] }, { "id": "https://thehandycalculators.com/course-grade", "url": "https://thehandycalculators.com/course-grade", "title": "Course Grade Calculator", "content_text": "Weighted course grade from assignments, quizzes, and exams. Shows current grade plus the score needed on remaining work.", "summary": "Weighted course grade from assignments, quizzes, and exams. Shows current grade plus the score needed on remaining work.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Education" ] }, { "id": "https://thehandycalculators.com/credit-card-payoff", "url": "https://thehandycalculators.com/credit-card-payoff", "title": "Credit Card Payoff", "content_text": "How long it takes — and how much interest you'll pay — at your current monthly payment.", "summary": "How long it takes — and how much interest you'll pay — at your current monthly payment.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Money" ] }, { "id": "https://thehandycalculators.com/currency-converter", "url": "https://thehandycalculators.com/currency-converter", "title": "Currency Converter", "content_text": "Live exchange rates between major world currencies — updated daily (ECB).", "summary": "Live exchange rates between major world currencies — updated daily (ECB).", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Money" ] }, { "id": "https://thehandycalculators.com/date-difference", "url": "https://thehandycalculators.com/date-difference", "title": "Date Difference", "content_text": "Days, weeks, months, and years between any two dates — with optional business-days-only count.", "summary": "Days, weeks, months, and years between any two dates — with optional business-days-only count.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Time" ] }, { "id": "https://thehandycalculators.com/days-until", "url": "https://thehandycalculators.com/days-until", "title": "Days Until a Date", "content_text": "Countdown to any future date — birthdays, holidays, deadlines.", "summary": "Countdown to any future date — birthdays, holidays, deadlines.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Time" ] }, { "id": "https://thehandycalculators.com/discount", "url": "https://thehandycalculators.com/discount", "title": "Discount Calculator", "content_text": "Find the sale price after any percentage discount.", "summary": "Find the sale price after any percentage discount.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Money" ] }, { "id": "https://thehandycalculators.com/fraction-calculator", "url": "https://thehandycalculators.com/fraction-calculator", "title": "Fraction Calculator", "content_text": "Add, subtract, multiply, and divide fractions and mixed numbers — results returned simplified, as a mixed number, and as a decimal.", "summary": "Add, subtract, multiply, and divide fractions and mixed numbers — results returned simplified, as a mixed number, and as a decimal.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Education" ] }, { "id": "https://thehandycalculators.com/gas-mileage", "url": "https://thehandycalculators.com/gas-mileage", "title": "Gas Mileage Calculator", "content_text": "MPG from miles and gallons, plus total trip fuel cost at any price per gallon.", "summary": "MPG from miles and gallons, plus total trip fuel cost at any price per gallon.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Conversions" ] }, { "id": "https://thehandycalculators.com/gpa", "url": "https://thehandycalculators.com/gpa", "title": "GPA Calculator", "content_text": "Calculate your semester or cumulative GPA on a 4.0 scale.", "summary": "Calculate your semester or cumulative GPA on a 4.0 scale.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Education" ] }, { "id": "https://thehandycalculators.com/grade-needed", "url": "https://thehandycalculators.com/grade-needed", "title": "Grade Needed Calculator", "content_text": "Find the GPA you need on remaining coursework to hit a target cumulative GPA.", "summary": "Find the GPA you need on remaining coursework to hit a target cumulative GPA.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Education" ] }, { "id": "https://thehandycalculators.com/heart-rate-zones", "url": "https://thehandycalculators.com/heart-rate-zones", "title": "Heart Rate Zone Calculator", "content_text": "Calculate your five training heart-rate zones from age and resting HR using Tanaka, Fox, Gulati, or Karvonen heart-rate-reserve formulas.", "summary": "Calculate your five training heart-rate zones from age and resting HR using Tanaka, Fox, Gulati, or Karvonen heart-rate-reserve formulas.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Health" ] }, { "id": "https://thehandycalculators.com/heloc", "url": "https://thehandycalculators.com/heloc", "title": "HELOC Calculator", "content_text": "Home equity line of credit: max borrow, interest-only payment, and full repayment cost.", "summary": "Home equity line of credit: max borrow, interest-only payment, and full repayment cost.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Money" ] }, { "id": "https://thehandycalculators.com/hotel-proforma", "url": "https://thehandycalculators.com/hotel-proforma", "title": "Hotel Income Proforma", "content_text": "ADR × Occupancy × Keys → RevPAR, NOI, and value per key.", "summary": "ADR × Occupancy × Keys → RevPAR, NOI, and value per key.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Real Estate" ] }, { "id": "https://thehandycalculators.com/hourly-to-salary", "url": "https://thehandycalculators.com/hourly-to-salary", "title": "Hourly to Salary", "content_text": "Convert hourly wage to annual salary (and back) with custom hours per week.", "summary": "Convert hourly wage to annual salary (and back) with custom hours per week.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Money" ] }, { "id": "https://thehandycalculators.com/ideal-weight", "url": "https://thehandycalculators.com/ideal-weight", "title": "Ideal Weight Calculator", "content_text": "Estimate ideal body weight from height, sex, and frame using Hamwi, Devine, Robinson, and Miller formulas, plus the healthy-BMI range.", "summary": "Estimate ideal body weight from height, sex, and frame using Hamwi, Devine, Robinson, and Miller formulas, plus the healthy-BMI range.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Health" ] }, { "id": "https://thehandycalculators.com/income-proforma", "url": "https://thehandycalculators.com/income-proforma", "title": "Income Proforma Hub", "content_text": "Pick a property type — multifamily, hotel, retail, office, or industrial — and underwrite it.", "summary": "Pick a property type — multifamily, hotel, retail, office, or industrial — and underwrite it.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Real Estate" ] }, { "id": "https://thehandycalculators.com/industrial-proforma", "url": "https://thehandycalculators.com/industrial-proforma", "title": "Industrial Income Proforma", "content_text": "Warehouse / distribution NOI, NNN rent PSF, and value per SF.", "summary": "Warehouse / distribution NOI, NNN rent PSF, and value per SF.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Real Estate" ] }, { "id": "https://thehandycalculators.com/inflation", "url": "https://thehandycalculators.com/inflation", "title": "Inflation Calculator", "content_text": "What a dollar from any year is worth today — adjust for the inflation rate.", "summary": "What a dollar from any year is worth today — adjust for the inflation rate.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Money" ] }, { "id": "https://thehandycalculators.com/investment-roi", "url": "https://thehandycalculators.com/investment-roi", "title": "Investment ROI", "content_text": "Total return, profit, and annualized CAGR for any investment.", "summary": "Total return, profit, and annualized CAGR for any investment.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Money" ] }, { "id": "https://thehandycalculators.com/loan", "url": "https://thehandycalculators.com/loan", "title": "Loan Calculator", "content_text": "Monthly payment and total interest for any personal or auto loan.", "summary": "Monthly payment and total interest for any personal or auto loan.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Money" ] }, { "id": "https://thehandycalculators.com/lumber", "url": "https://thehandycalculators.com/lumber", "title": "Lumber & Board Foot Calculator", "content_text": "Calculate board feet for dimensional lumber. Add multiple sizes for total board feet, lineal feet, waste, and cost.", "summary": "Calculate board feet for dimensional lumber. Add multiple sizes for total board feet, lineal feet, waste, and cost.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Home" ] }, { "id": "https://thehandycalculators.com/macro", "url": "https://thehandycalculators.com/macro", "title": "Macro Calculator", "content_text": "Daily protein, carbs, and fat targets for cutting, maintenance, or bulking based on your TDEE.", "summary": "Daily protein, carbs, and fat targets for cutting, maintenance, or bulking based on your TDEE.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Health" ] }, { "id": "https://thehandycalculators.com/mortgage", "url": "https://thehandycalculators.com/mortgage", "title": "Mortgage Calculator", "content_text": "Monthly payment, taxes, insurance, and required income.", "summary": "Monthly payment, taxes, insurance, and required income.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Money" ] }, { "id": "https://thehandycalculators.com/mortgage-refinance", "url": "https://thehandycalculators.com/mortgage-refinance", "title": "Mortgage Refinance", "content_text": "Monthly savings, break-even point, and lifetime savings from refinancing.", "summary": "Monthly savings, break-even point, and lifetime savings from refinancing.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Money" ] }, { "id": "https://thehandycalculators.com/mulch-gravel", "url": "https://thehandycalculators.com/mulch-gravel", "title": "Mulch & Gravel Calculator", "content_text": "Cubic yards, cubic feet, bags, and tons of mulch, gravel, topsoil, or sand to cover a rectangular area at any depth.", "summary": "Cubic yards, cubic feet, bags, and tons of mulch, gravel, topsoil, or sand to cover a rectangular area at any depth.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Home" ] }, { "id": "https://thehandycalculators.com/multifamily-proforma", "url": "https://thehandycalculators.com/multifamily-proforma", "title": "Multifamily Income Proforma", "content_text": "Apartment building NOI, cap-rate value, value per door, and DSCR.", "summary": "Apartment building NOI, cap-rate value, value per door, and DSCR.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Real Estate" ] }, { "id": "https://thehandycalculators.com/net-worth", "url": "https://thehandycalculators.com/net-worth", "title": "Net Worth Calculator", "content_text": "Add up assets, subtract liabilities, see your total net worth.", "summary": "Add up assets, subtract liabilities, see your total net worth.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Money" ] }, { "id": "https://thehandycalculators.com/office-proforma", "url": "https://thehandycalculators.com/office-proforma", "title": "Office Income Proforma", "content_text": "Office building NOI, rent PSF, expense recoveries, and value per SF.", "summary": "Office building NOI, rent PSF, expense recoveries, and value per SF.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Real Estate" ] }, { "id": "https://thehandycalculators.com/one-rep-max", "url": "https://thehandycalculators.com/one-rep-max", "title": "One-Rep Max (1RM)", "content_text": "Estimate your 1RM from a working set using Epley, Brzycki, Lombardi, O'Conner, and Lander formulas.", "summary": "Estimate your 1RM from a working set using Epley, Brzycki, Lombardi, O'Conner, and Lander formulas.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Health" ] }, { "id": "https://thehandycalculators.com/ovulation", "url": "https://thehandycalculators.com/ovulation", "title": "Ovulation Calculator", "content_text": "Estimated ovulation date, six-day fertile window, and next expected period from your last menstrual period and cycle length.", "summary": "Estimated ovulation date, six-day fertile window, and next expected period from your last menstrual period and cycle length.", "date_modified": "2026-05-12T12:00:00Z", "date_published": "2026-05-12T12:00:00Z", "tags": [ "Health" ] } ] }