Compound Interest Calculator
Free compound interest calculator with monthly contributions. See your investment grow over time with interactive bar chart, total interest earned, and growth rate.
Salary Calculator
Free salary calculator to convert between annual, monthly, biweekly, weekly, daily, and hourly pay. Enter any format and see all conversions instantly.
ROI Calculator
Free ROI calculator to compute return on investment percentage, annualized ROI, and net profit. Enter investment and return amounts to get instant results.
Scientific Calculator
Free online scientific calculator with trigonometric functions (sin, cos, tan), logarithms (log, ln), square root, power, factorial, modulo and more. Supports keyboard input and calculation history.
Mortgage Calculator
Calculate your monthly mortgage payment, total interest, and view a full amortization schedule. Compare fixed payment vs declining balance methods instantly.
BMI Calculator
Free online BMI calculator. Enter your height and weight to instantly calculate your Body Mass Index. Find out if you are underweight, normal, overweight or obese with WHO standards.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal instantly. Free online base converter with real-time results, quick examples, and a conversion reference table.
Interest Calculator
Calculate simple or compound interest instantly. Enter principal, rate, and time to find total interest earned or owed. Supports annual, monthly, and daily compounding.
Auto Loan Calculator
Calculate your monthly car payment, total interest, and loan cost. Enter vehicle price, down payment, rate, and term to plan your auto financing.
Savings Calculator
Calculate how much interest your savings will earn. Enter your deposit amount, annual rate, and term to see total returns, daily earnings, and monthly income.
APY Calculator
Convert between daily, monthly, and annual yield rates instantly. Calculate APY from investment returns with our free online annual percentage yield calculator.
Ovulation Calculator
Calculate your ovulation day, fertile window, and safe period based on your menstrual cycle. Free online ovulation tracker with calendar view for family planning.
Percentage Calculator
Free Percentage Calculator – Calculate percentages 4 ways: find X% of Y, what percent X is of Y, percentage change, and increase/decrease by percent.
Due Date Calculator
Calculate your pregnancy due date, current week, and trimester from your last menstrual period. Track pregnancy progress with our free due date calculator.
Fraction Calculator
Free Fraction Calculator – Add, subtract, multiply, and divide fractions with auto-simplification. Convert between fractions and decimals.
Safe Period Calculator
Calculate your safe and fertile periods based on your menstrual cycle. Includes timeline visualization. Important: the rhythm method is NOT reliable for contraception.
Ratio Calculator
Free Ratio Calculator – Solve proportions (A:B = C:?) and simplify ratios. Leave one value empty to solve. Instant results.
Period Calculator
Predict your next period and future cycles based on your menstrual history. Free period calculator with 6-month forecast to help you plan ahead.
Loan Calculator
Free Loan Calculator – Enter loan amount, interest rate, and term to calculate monthly payments, total interest, and total cost. Works for mortgages, auto loans, and more.
Calorie Calculator
Free online calorie calculator. Calculate your daily calorie needs (TDEE), basal metabolic rate (BMR), and look up calories in common foods. Essential tool for weight management.
Discount Calculator
Free Discount Calculator – Enter original price and discount percentage to instantly see the final price and how much you save.
Body Fat Calculator
Free online body fat calculator. Calculate your body fat percentage using BMI estimation or the Navy formula. Get body composition analysis including fat mass and lean mass.
Tip Calculator
Free Tip Calculator – Calculate tip amount, total bill, and per-person split. Quick percentage buttons for 10%, 15%, 18%, 20%, 25%. No signup needed.
Fuel Consumption Calculator
Free fuel consumption calculator. Calculate fuel consumption per 100 km and estimate trip fuel costs. Track your vehicle fuel economy and save money on gas.
Loan Prepayment Calculator
Free loan prepayment calculator. Calculate how much interest you save by making extra payments on your mortgage or loan. Compare shortening the term vs reducing monthly payments.