All calculators
Every tool in one place. Search by name or browse by category.
No calculators match your search yet — try a different term.
- Amortization Calculator See how each payment splits between principal and interest across the life of a loan. Open calculator
- Auto Loan Calculator Work out car payments including down payment, trade-in, sales tax and fees. Open calculator
- Compound Interest Calculator Convert an interest rate between compounding periods — APR to APY and back — so two quotes can be compared on equal terms. Open calculator
- Credit Card Payoff Calculator Build a debt-avalanche payoff plan for several credit cards from one monthly budget — when each card clears, what it costs, and what to pay on each card every month. Open calculator
- Home Equity Loan Calculator Estimate borrowing power and payments against your home equity. Open calculator
- Income Tax Calculator Estimate the refund or amount owed on a 2025 or 2026 federal return, line by line. Open calculator
- Inflation Calculator Convert an amount between any two months since 1913 with published U.S. CPI data, or project it at a flat rate. Open calculator
- Interest Calculator Work out the compound interest and final balance on a lump sum plus regular contributions, allowing for tax and inflation. Open calculator
- Interest Rate Calculator Find the effective interest rate on a loan or investment. Open calculator
- Investment Calculator Project what a starting amount and regular contributions grow to, with the accumulation schedule year by year and month by month. Open calculator
- Loan Calculator Calculate the monthly payment, total interest and payoff timeline for any fixed-rate loan. Open calculator
- Mortgage Calculator Estimate your monthly mortgage payment including principal, interest, property tax, insurance and PMI, and a year-by-year amortization schedule. Open calculator
- Payment Calculator Calculate the monthly payment or payoff term for a fixed loan. Open calculator
- Retirement Calculator Estimate whether your savings and contributions will fund your retirement goals. Open calculator
- Salary Calculator Convert pay between eight frequencies, before and after holidays and vacation days. Open calculator
- Sales Tax Calculator Fill in any two of before-tax price, tax rate and after-tax price to get the third. Open calculator
- Savings Calculator Project how regular deposits and interest can grow your savings, or calculate the monthly deposit needed to reach a savings goal. Open calculator
- Simple Interest Calculator Calculate simple interest and the end balance, or solve back for the principal, term or rate — with the working shown. Open calculator
- Tip Calculator Calculate the tip, total bill, and amount per person when splitting a bill. Open calculator
- VAT Calculator Fill in any two of VAT rate, net price, gross price and tax amount to get the other two. Open calculator
- BMI Calculator Calculate your Body Mass Index (BMI) from height and weight, see your WHO weight category, and your healthy weight range. Open calculator
- BMR Calculator Estimate your Basal Metabolic Rate — the calories you burn at rest. Open calculator
- Body Fat Calculator Estimate body fat from tape measurements with the U.S. Navy method, plus mass, category and a BMI estimate. Open calculator
- Calorie Calculator Find your daily calorie needs for maintaining, losing or gaining weight. Open calculator
- Due Date Calculator Estimate a pregnancy due date from the last menstrual period. Open calculator
- Fat Intake Calculator Estimate recommended daily fat intake within your calorie target. Open calculator
- Ideal Weight Calculator Find a healthy target weight range for your height using established formulas. Open calculator
- Pace Calculator Calculate running pace and speed from distance and elapsed time, with equivalent finish times for common race distances. Open calculator
- Pregnancy Calculator Track pregnancy weeks and key milestones. Open calculator
- Protein Calculator Estimate daily protein needs based on body weight and activity. Open calculator
- Target Heart Rate Calculator Find your training heart-rate zones from age and resting heart rate. Open calculator
- Area Calculator Calculate the area of a rectangle, square, triangle, circle, trapezoid, parallelogram or ellipse. Open calculator
- Fraction Calculator Add, subtract, multiply and divide fractions with steps. Open calculator
- Percentage Calculator Calculate percentages, percentage change and percent-of quickly. Open calculator
- Random Number Generator Generate random numbers within a range, with options for uniqueness. Open calculator
- Scientific Calculator A free online scientific calculator with trigonometry, logarithms, powers, roots, factorials, memory and constants — works on any device. Open calculator
- Standard Deviation Calculator Compute the population and sample standard deviation, variance and mean of a data set, step by step. Open calculator
- Statistics Calculator Calculate mean, median, mode, range, variance, standard deviation and quartiles from a data set, with a full five-number summary. Open calculator
- Triangle Calculator Calculate a triangle's area, perimeter, angles and classification from three side lengths. Open calculator
- Volume Calculator Calculate the volume of a cube, box, sphere, cylinder, cone, pyramid or capsule. Open calculator
- Age Calculator Calculate exact age in years, months and days from a birth date. Open calculator
- Concrete Calculator Estimate concrete volume in cubic yards or metres for slabs and footings. Open calculator
- Date Calculator Add or subtract days from a date, or find the days between two dates. Open calculator
- GPA Calculator Compute grade point average from course grades and credit hours. Open calculator
- Grade Calculator Find the grade you need and your weighted course average. Open calculator
- Hours Calculator Calculate hours worked between two times, minus breaks. Open calculator
- Password Generator Create strong, random passwords with configurable length and characters. Open calculator
- Square Footage Calculator Calculate the square footage of a room or area for flooring, paint or landscaping, with a cost estimate. Open calculator
- Time Calculator Add, subtract and convert units of time. Open calculator
- Unit Conversion Calculator Convert length, weight, volume, temperature and more. Open calculator