# CountCrunch > CountCrunch is a free, no-sign-up collection of online calculators: finance, India finance, health, everyday and payroll math. Every calculator runs entirely in the visitor's browser; results can be exported as PDF, Excel or CSV. Each calculator page explains the formula behind the answer. ## [Finance Calculators](https://countcrunch.com/finance-calculators/) Mortgages, loans, investing and paycheck math — precise answers in seconds. - [Mortgage Calculator](https://countcrunch.com/mortgage/): Free mortgage calculator: estimate monthly payment, total interest and full payoff schedule for any home loan. - [Biweekly Mortgage Payoff Calculator](https://countcrunch.com/biweekly-mortgage-payoff/): See how biweekly mortgage payments shorten your loan term and cut total interest versus standard monthly payments. - [Mortgage Refinance Calculator](https://countcrunch.com/refinance/): Should you refinance your mortgage? Compare monthly savings against closing costs and find your break-even month. - [Compound Interest Calculator](https://countcrunch.com/compound-interest/): Project investment growth with compound interest: monthly contributions, flexible compounding and year-by-year tables. - [Paycheck Calculator](https://countcrunch.com/paycheck/): Estimate take-home pay per paycheck after federal tax, state tax and FICA — for any pay frequency, hourly or salaried. - [Profit Margin Calculator](https://countcrunch.com/profit-margin/): Calculate profit margin, markup percentage and gross profit from revenue and cost — never confuse margin with markup again. - [Markup Calculator](https://countcrunch.com/markup/): Set the right selling price: compute markup percentage, margin equivalent and profit per unit from your costs, free. - [401(k) Retirement Calculator](https://countcrunch.com/401k-retirement/): Project your 401(k) balance at retirement with contributions, employer match, contribution limits and investment growth. - [Auto Loan Calculator](https://countcrunch.com/auto-loan/): Estimate car loan monthly payments, total interest and the true cost of the car before you sign — compare 36 to 72 months. - [Credit Card Payoff Calculator](https://countcrunch.com/credit-card-payoff/): Find out exactly how long until you're debt-free and how much interest you'll pay at any monthly payment you choose. - [Savings Goal Calculator](https://countcrunch.com/savings-goal/): How much must you save each month to hit your goal? Compute the required monthly deposit with interest included. - [CAGR Calculator](https://countcrunch.com/cagr/): Compute the compound annual growth rate (CAGR) between any two values over any period — investments, revenue or savings. ## [India Finance Calculators](https://countcrunch.com/india-finance-calculators/) SIP, EMI, PPF, tax and government schemes — built for Indian investors. - [SIP Calculator](https://countcrunch.com/sip/): Estimate SIP maturity value, total invested and wealth gained for any monthly SIP — with step-up mode and year-wise growth. - [Home Loan EMI Calculator](https://countcrunch.com/home-loan-emi/): Calculate home loan EMI, total interest and full amortisation for Indian housing loans — compare banks on equal terms. - [Car Loan EMI Calculator](https://countcrunch.com/car-loan-emi/): Monthly EMI, total interest and total payable for car loans in India — compare 3, 5 and 7-year tenures before booking. - [Personal Loan EMI Calculator](https://countcrunch.com/personal-loan-emi/): EMI, total interest and every charge for personal loans from Indian banks — processing fees included. Check affordability first. - [PPF Calculator](https://countcrunch.com/ppf/): Project PPF maturity value, total deposits and tax-free interest over 15 years — with 5-year extension modeling included. - [Income Tax Calculator](https://countcrunch.com/income-tax/): Compare old vs new regime income tax for FY 2025-26 with updated slabs — find which regime saves you more, instantly. - [Gratuity Calculator](https://countcrunch.com/gratuity/): Calculate gratuity payable under the Payment of Gratuity Act, 1972 — from last drawn salary and completed years of service. - [HRA Exemption Calculator](https://countcrunch.com/hra/): Compute HRA tax exemption under Section 10(13A): actual HRA, rent paid and metro vs non-metro limits compared automatically. - [FD Calculator](https://countcrunch.com/fd/): Maturity value and interest for bank fixed deposits with quarterly compounding — compare tenures and senior-citizen rates. - [RD Calculator](https://countcrunch.com/rd/): Project recurring deposit maturity, total deposits and interest earned for any monthly RD plan — quarterly compounding. - [EPF Calculator](https://countcrunch.com/epf/): Estimate your EPF corpus at retirement from monthly PF contributions, employer share, hikes and declared interest rates. - [SSY Calculator](https://countcrunch.com/ssy/): Maturity value and tax-free interest for Sukanya Samriddhi Yojana — 15 deposit years modeled to 21-year maturity. - [GST Calculator](https://countcrunch.com/gst/): Add or remove GST from any amount with CGST/SGST split across all slabs — forward and reverse calculation, free. ## [Health Calculators](https://countcrunch.com/health-calculators/) BMI, calories, body fat and pregnancy timelines from validated formulas. - [BMI Calculator](https://countcrunch.com/bmi/): Free BMI calculator: enter height and weight in metric or imperial units to get your Body Mass Index, weight category and healthy weight range instantly. - [TDEE & Calorie Calculator](https://countcrunch.com/calorie-tdee/): Free TDEE calculator: get your maintenance calories via the Mifflin-St Jeor equation, plus daily targets for losing, maintaining or gaining weight. - [BMR Calculator](https://countcrunch.com/bmr/): Free BMR calculator: find your basal metabolic rate — the calories your body burns at complete rest — via the validated Mifflin-St Jeor equation. - [Body Fat Calculator](https://countcrunch.com/body-fat/): Free body fat percentage calculator (US Navy method): waist, neck and hip measurements to estimate body fat and lean mass. - [Pregnancy Due Date Calculator](https://countcrunch.com/due-date/): Free due date calculator: enter the first day of your last period for your estimated due date, conception date and a week-by-week trimester timeline. - [Ovulation & Fertility Calculator](https://countcrunch.com/ovulation/): Free ovulation calculator: enter your last period and cycle length to find your fertile window, ovulation day and next period, with a cycle calendar. - [Daily Water Intake Calculator](https://countcrunch.com/water-intake/): Free daily water intake calculator: personalized hydration target from weight, activity level, heat and exercise. - [Ideal Weight Calculator](https://countcrunch.com/ideal-weight/): Free ideal weight calculator: find your healthy weight range for your height using the Robinson, Miller and Devine formulas, plus a BMI-based range. ## [Everyday Calculators](https://countcrunch.com/everyday-calculators/) Age, percentages, tips, GPA and dates — the little math of daily life. - [Age Calculator](https://countcrunch.com/age/): Free age calculator: find your exact age in years, months and days from any birth date, plus total months, weeks, days and your next birthday countdown. - [Percentage Calculator](https://countcrunch.com/percentage/): Free percentage calculator: find X% of Y, what percentage X is of Y, and percentage increase or decrease — the three percent problems people Google most. - [Discount Calculator](https://countcrunch.com/discount/): Free discount calculator: enter the original price and discount percent to see the sale price, how much you save, and the final price with tax included. - [Tip Calculator](https://countcrunch.com/tip/): Free tip calculator: enter the bill to get tip amounts at any percentage, the total, and a fair per-person split — with tax and discount handled properly. - [Date Duration Calculator](https://countcrunch.com/date-duration/): Free date duration calculator: exact days, weeks, months and years between any two dates — deadlines, contracts, anniversaries. - [GPA Calculator](https://countcrunch.com/gpa/): Free GPA calculator: enter course grades and credit hours to compute your semester GPA on the 4.0 scale, plus what you need next term to hit your target. - [Love Compatibility Calculator](https://countcrunch.com/love-compatibility/): Just for fun: enter two names for a playful love compatibility score with a lighthearted reading. Share your score! ## [Payroll Calculators](https://countcrunch.com/payroll-calculators/) Time cards, hours and overtime pay — built for hourly workers. - [Time Card Calculator](https://countcrunch.com/time-card/): Free time card calculator: clock-in/out times with breaks — weekly hours, regular vs overtime split, and gross pay. - [Overtime Pay Calculator](https://countcrunch.com/overtime/): Free overtime pay calculator: enter your hourly rate and hours to get overtime hours, time-and-a-half pay and total gross pay, with the math shown. ## Guides ## About - [About](https://countcrunch.com/about/) - [Editorial policy](https://countcrunch.com/editorial-policy/) - [Privacy policy](https://countcrunch.com/privacy-policy/) - [Pricing](https://countcrunch.com/pricing/)