Free online calculators
49 free tools ready to use
Age Calculator
Calculate your exact age in years, months, and days from your date of birth — plus next birthday countdown.
Open tool →Aspect Ratio Calculator
Calculate and scale aspect ratios for images and video.
Open tool →Auto Loan Calculator
Estimate car-loan payments, interest, total cost, taxes, trade-in value, and extra-payment savings.
Open tool →Average Mean Median Calculator
Calculate mean, median, mode, and range from a number list.
Open tool →Basic Calculator
Everyday arithmetic calculator in your browser.
Open tool →BMI Calculator
Check your Body Mass Index with metric or imperial units and see your healthy weight range instantly.
Open tool →BMR Calculator
Estimate basal metabolic rate and daily calorie needs using the Mifflin-St Jeor equation.
Open tool →Body Fat Calculator
Estimate body fat percentage with the US Navy method.
Open tool →Calorie Calculator
Estimate daily calorie needs (BMR and TDEE).
Open tool →CGPA Calculator
Calculate cumulative GPA (CGPA) from semester SGPAs and credit hours — 10-point or 4-point scale.
Open tool →Compound Interest Calculator
Calculate compound interest growth over time.
Open tool →Credit Card Payoff Calculator
Estimate credit-card payoff time, interest, and the payment needed for a target date.
Open tool →Date Calculator
Count days between two dates or add and subtract days, weeks, months, and years from any date.
Open tool →Days Until Date
Count days until any future date.
Open tool →Debt-to-Income Calculator
Calculate front-end and back-end debt-to-income ratios from monthly income and obligations.
Open tool →Discount Calculator
Find sale price and savings from a percentage discount.
Open tool →ERA Calculator
Calculate baseball earned run average (ERA) from innings pitched and earned runs.
Open tool →Exam Marks Calculator
Add subject marks, get total score, percentage, grade, and pass/fail for exams.
Open tool →Fraction Calculator
Add, subtract, multiply, and divide fractions.
Open tool →Fuel Cost Calculator
Estimate trip fuel cost from distance and efficiency.
Open tool →GPA Calculator 4.0
Calculate US 4.0-scale GPA from course credits and grades.
Open tool →Ideal Weight Calculator
Find ideal weight ranges from height and sex.
Open tool →Islamic Zakat Calculator
Estimate Zakat on cash, gold, silver, investments, business assets, and receivables using gold or silver nisab.
Open tool →Loan Calculator
Calculate EMI, total interest, and repayment summary for home, car, or personal loans.
Open tool →Matrix Calculator
Calculate determinants, inverses, and 2×2 matrix products.
Open tool →Mortgage Calculator
Estimate mortgage monthly payments and total interest.
Open tool →Ovulation Period Calculator
Estimate fertile window and next period from cycle data.
Open tool →Percentage Calculator
Find X% of a number, what percent one number is of another, and percentage increase or decrease.
Open tool →Plate Weight Calculator
Estimate steel or metal plate weight from length, width, thickness, and material density.
Open tool →Pregnancy Due Date Calculator
Estimate due date and pregnancy week from LMP.
Open tool →Prime LCM GCD Checker
Check primes and calculate LCM and GCD.
Open tool →Quadratic Equation Solver
Solve quadratic equations for real and complex roots.
Open tool →Ratio Calculator
Free online ratio calculator. Instantly solve, simplify, scale a ratio to a total, or find a missing part. No sign-up — runs in your browser.
Open tool →Retirement Calculator
Project retirement savings with contributions and returns.
Open tool →ROI Investment Calculator
Calculate ROI, annualized return, net profit, break-even time, and compare investments.
Open tool →Room Area Calculator
Calculate five room shapes, convert area units, and estimate flooring waste, packs, and cost.
Open tool →Running Pace Calculator
Calculate running pace, speed, distance, or finish time with common race projections.
Open tool →Salary Hourly Wage Calculator
Convert seven pay periods with custom schedules, overtime, bonuses, and take-home estimates.
Open tool →Savings Goal Calculator
Calculate the monthly contribution needed to reach a savings goal with compound growth.
Open tool →Scientific Calculator
Evaluate scientific expressions with trig, logs, powers, memory, history, and three angle modes.
Open tool →SGPA Calculator
Calculate weighted SGPA, project CGPA, analyze course impact, and plan target grades.
Open tool →Simple Interest Calculator
Calculate or solve simple interest, principal, rate, and time with growth charts and comparisons.
Open tool →Speed Distance Time Calculator
Solve speed, distance, or time with unit conversion, pace, arrival planning, and a journey graph.
Open tool →Standard Deviation Calculator
Calculate mean, variance, standard deviation, range, and count for sample or population data.
Open tool →Tax GST VAT Calculator
Add, remove, combine, or reverse GST/VAT and estimate progressive tax with custom brackets.
Open tool →Time Calculator
Calculate exact intervals, add or subtract time, sum durations, convert units, and visualize timelines.
Open tool →Tip Calculator
Calculate tips with tax, rounding, equal or weighted splits, and reverse tip-rate solving.
Open tool →Triangle Calculator
Solve a triangle from three side lengths, including angles, area, perimeter, and classification.
Open tool →Working Days Calculator
Count working days, plan deadlines, exclude holidays, and visualize your work schedule.
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