Free Online Calculators with Step-by-Step Explanations
Use simple online calculators for math, finance, health, percentages, age and everyday calculations. Enter your values, calculate, and get clear results in seconds.
Popular Calculators
View all calculators →BMI Calculator
Calculate Body Mass Index using height and weight.
Mortgage Calculator
Estimate monthly home loan payments, interest and principal.
Calorie Calculator
Estimate daily calorie needs for common health and fitness goals.
Loan Calculator
Estimate loan payments, total interest and repayment cost.
Tip Calculator
Calculate a restaurant tip, total bill and amount per person.
Compound Interest Calculator
Project investment growth from principal, rate, time and contributions.
Age Calculator
Find age in years, months and days from a birth date.
Tax Calculator
Estimate U.S. federal income tax from income, deductions and credits.
Percentage Calculator
Find percentages, percentage changes and percentage differences.
Time Calculator
Calculate elapsed time and duration using hours, minutes and seconds.