Free Online Calculators

Practical Calculators hosts free calculators for loans, mortgages, savings, health metrics, and everyday conversions. Each calculator page documents inputs and formulas in a methodology section.

Popular calculators

• APR Calculator
• Mortgage Calculator
• ROI Calculator
• Debt-to-Income (DTI) Calculator
• Loan Calculator
• APY Calculator

Categories

Financial

View all 147 Financial calculators

• APR Calculator
• Mortgage Calculator
• Loan Calculator
• ROI Calculator
• Debt-to-Income (DTI) Calculator
• Compound Interest
• Savings Calculator
• Retirement Calculator

Conversions

View all 158 Conversions calculators

Unit & time converters

• Kilometers to Miles Converter
• Celsius to Fahrenheit Converter
• Seconds to Minutes Converter
• Percentage Calculator
• Minutes to Hours Converter

Currency converters

• USD to EUR Converter
• EUR to USD Converter
• USD to GBP Converter
• GBP to USD Converter

Health

View all 12 Health calculators

• BMI Calculator
• Calorie Calculator
• Weight Loss Calculator
• Ovulation Calculator
• Macros Calculator

Career

View all 15 Career calculators

• Salary Calculator
• GPA Calculator
• $30,000 Salary to Hourly Calculator
• $50,000 Salary to Hourly Calculator
• $100,000 Salary to Hourly Calculator

Regional Indexes

• Spanish Calculators
• U.S. State Calculators