Every number,
worked out for you.
Calcora is a free collection of fast, accurate calculators for money, health, math, and dates — no sign-up, no clutter, answers as you type.
Browse calculators
Cultural Pulse
Financial
- Guide: Understanding Loans, Interest & Retirement
- Loan Calculator
- Mortgage Calculator
- Payment Calculator
- Retirement Calculator
- Amortization Calculator
- Investment Calculator
- Inflation Calculator
- Finance Calculator
- Income Tax Calculator
- Salary Calculator
- Interest Rate Calculator
- Sales Tax Calculator
- Compound Interest Calculator
- Tip Calculator
Health & Fitness
Math
Frequently asked questions
Is Calcora free to use?
Yes. Every calculator on Calcora is free, with no account, sign-up, or payment required. The site is supported by advertising rather than subscriptions.
Do I need to create an account or sign up?
No. There's no login, email address, or account of any kind — open a calculator and start using it right away.
Is my data sent to a server or stored anywhere?
No. Every calculator runs entirely in your browser using JavaScript. The numbers you enter are never transmitted to or stored on Calcora's servers.
How accurate are Calcora's calculators?
Each calculator uses a standard, published formula for its category — the amortization formula for loans, the Mifflin–St Jeor equation for calorie needs, current IRS bracket figures for income tax, and so on — checked against known reference values before it goes live.
Can I use Calcora on my phone?
Yes. The site is fully responsive and works in any modern mobile or desktop browser — no app to install.
How many calculators does Calcora have?
43 calculators across five categories: Cultural Pulse, Financial, Health & Fitness, Math & Utilities, and Dates & Time.