Fast, Free & Accurate Calculators
Your one-stop destination for a wide array of calculators designed to make your daily tasks easier across finance, health, math, and more.
Popular Calculators
Try out some of our most popular and useful calculators, including tools for loans, BMI, and budgeting.
Mortgage Calculator
Estimate monthly payments, P&I, taxes, insurance, and view amortization.
Amortization Calculator
Calculate your loan payments and see how extra payments can save you money and shorten your loan term.
Mortgage Payoff Calculator
Determine how early you can pay off your mortgage with extra payments.
House Affordability Calculator
Estimate what house price you can afford based on your income, debts, or budget.
Rent Calculator
Estimate an affordable monthly rent based on your income and debts.
DTI Ratio Calculator
Calculate your debt-to-income ratio to assess financial health.
Refinance Calculator
Analyze if refinancing your mortgage is a good financial decision.
Loan Calculator
Estimate loan payments, interest, and amortization schedules.
Budget Calculator
Plan your monthly expenses and track your spending habits effectively.
BMI Calculator
Calculate your Body Mass Index quickly and easily.
Percentage Calculator
Calculate percentages, discounts, and tips effortlessly.
Auto Loan Calculator
Estimate car loan payments, total interest, and see an amortization schedule.
Interest Calculator
Calculate compound interest on an initial investment with optional regular contributions, considering taxes and inflation.
Explore Categories
Find the perfect tool for your needs across various domains, from financial planning to health monitoring and mathematical problem-solving.
Financial Calculators
Comprehensive tools for managing your finances, from loans and investments to retirement and taxes.
Health & Fitness Calculators
Monitor your physical well-being with calculators for fitness, pregnancy, and general health.
Math Calculators
Solve mathematical problems with calculators for statistics, geometry, and more.
Other Calculators
A diverse collection of utility, conversion, and specialized calculators for various everyday needs.
From Our Blog
Read our latest articles and insights on finance, health, and everything in between.
October 1, 2024 • by The calcu.online Team
Top 10 Free Online Calculators in 2025
Discover the most essential free online calculators for finance, math, and health. From our online mortgage calculator to our scientific calculator online, these tools are a must-have.
July 22, 2024 • by Jane Doe
A Beginner's Guide to Understanding Your Mortgage
Learn the basics of mortgages, including key components like principal, interest, term, and escrow, to make informed financial decisions.