Simple, free, no-nonsense calculators for everyday math. No login, no sign-up, no personal data collected from your calculations.
calculator-free.com was built on a simple idea: the most useful tools on the internet should be free, fast, and frictionless. You shouldn't need an account to figure out how much your mortgage payment will be. You shouldn't need to share your email to find out what a 20% tip on a dinner bill comes to.
Every calculator on this site runs entirely in your browser. When you type in your loan amount or your body weight, that information never leaves your device. It's not sent to any server, not logged, not stored. Your numbers are your business.
The site is ad-supported through Google AdSense, which allows us to keep every tool completely free for everyone. We believe the trade-off — seeing a few display ads in exchange for getting a high-quality calculator with zero friction — is a fair one.
Every tool works immediately. No registration, no email, no paywall. Just open the page and start calculating.
All calculations happen in your browser. Your loan amounts, weight, and financial data never touch our servers.
Fully responsive on any device — desktop, tablet, or phone. No app to download, no Flash, no plugins required.
Beyond raw numbers, we provide plain-language explanations so you understand what the results actually mean.
Calculates your complete monthly mortgage payment including Principal, Interest, Property Taxes, and Insurance (PITI). Also generates a full year-by-year amortization schedule showing how your balance decreases over time. Essential for home buyers evaluating what they can afford, comparing 15-year vs. 30-year terms, or estimating total interest costs over the life of a loan.
Use the Mortgage CalculatorCalculates Body Mass Index in both metric (kg/cm) and imperial (lbs/ft/in) units. Displays your BMI on a visual scale, identifies your weight category (Underweight, Normal, Overweight, Obese), and provides educational context about what BMI measures and its limitations. The calculator is for adults — children's BMI uses different age-adjusted charts.
Use the BMI CalculatorCalculates the tip amount and total bill for any tip percentage, and splits the result evenly among any number of people. Includes preset buttons for common tip amounts (10%, 15%, 18%, 20%, 25%, 30%) and custom input. Shows both total tip and per-person tip, and total bill with per-person total. Ideal for restaurants, delivery orders, and any service tip situation.
Use the Tip CalculatorProjects the future value of savings with compound interest, accounting for an initial deposit and recurring monthly contributions. Supports daily, monthly, quarterly, and annual compounding frequencies. Shows future value, total contributions, total interest earned, and return on investment percentage. Great for retirement planning, emergency fund goals, and comparing savings account rates.
Use the Savings CalculatorFour percentage tools in one page: (1) What is X% of Y?, (2) X is what percent of Y?, (3) Percent change from A to B, and (4) Discount and Markup calculator. Handles all the percentage math you encounter in shopping, finance, grading, and everyday life. Instant results update as you type.
Use the Percentage Calculator