Popular Calculators
The most-used free calculators on the web. Finance, math, health, construction, and more โ instant results, no signup required.
Mortgage Calculator
FinanceCalculate monthly mortgage payments, total interest, and amortization. Compare different loan terms and down payments.
Percentage Calculator
MathFind percentages instantly. Calculate what percent of a number is, percentage increase/decrease, and more.
BMI Calculator
HealthCalculate your Body Mass Index using height and weight. Understand your BMI category and healthy weight range.
Scientific Calculator
ToolFull-featured scientific calculator with trigonometry, logarithms, powers, memory, and keyboard support.
Graphing Calculator
ToolPlot 2D and 3D equations interactively. Multiple equations, zoom, pan, and fullscreen mode.
Compound Interest Calculator
FinanceSee how your money grows with compound interest over time. Include monthly contributions and different rates.
Tip Calculator
FinanceCalculate tips and split the bill between friends. Choose tip percentage and number of people.
Loan Payment Calculator
FinanceCalculate monthly payments for any loan. See total interest and amortization breakdown.
Concrete Calculator
ConstructionCalculate concrete volume needed for slabs, footings, and columns in cubic yards with waste factor.
Unit Converter - Inches to Feet
ConversionsConvert between inches and feet instantly. Supports fractional values and shows equivalent measurements.
Savings Calculator
FinanceProject your savings growth with regular deposits and compound interest over any time period.
Auto Loan Calculator
FinanceCalculate car loan payments, total cost, and compare financing options for your next vehicle.
GPA Calculator
EducationCalculate your GPA from grades and credit hours. Supports 4.0 and weighted scales.
Calorie Calculator
HealthEstimate daily calorie needs based on age, weight, height, and activity level.
Simple Interest Calculator
FinanceCalculate simple interest on loans or investments using principal, rate, and time.