Skip to content
jisuan

13 free calculators, no signup

Run the numbers before you make the decision

Mortgage payments, loan costs, federal taxes, take-home pay and retirement projections, with the formula shown and the assumptions spelled out. Everything runs instantly in your browser.

Instant
Results update as you type, with nothing to submit.
Transparent
Formula, assumptions and worked examples on every page.
Private
No accounts, no tracking of the numbers you enter.

The tools people reach for when a real decision is on the table.

See all 13 →

Browse by category

Why these calculators

The math is explained

Every calculator shows the formula behind it and works through a real example, so you can check the result rather than trust it.

No signup, no email

Nothing is gated. There is no account to create and no personal data required to get an answer.

Runs in your browser

Calculations happen on your device. Your numbers are never sent to a server or stored.

Assumptions are stated

Tax years, rate sources and known limitations are documented on each page instead of buried in fine print.

Latest guides

Plain-English explanations of how the numbers actually work.

All guides →
Loans5 min read

What Is a Good Debt-to-Income Ratio?

Debt-to-income ratio is the number that decides whether you get approved and how much you can borrow. Here is how it is calculated and what counts.

Read the guide →