About

What this is

Each tool answers one question people otherwise look up over and over: what a loan actually costs month by month, how much you can afford to borrow, what compound interest does over twenty years, your BMI against the cut-offs that apply to you, or a due date from a cycle that is not 28 days.

No ads, no sign-up, and nothing you type into a calculator is collected. Open the page, enter your numbers, get an answer.

Planning Poker is the exception: it is a tool several people share a room in, so the display name you choose and the card you play do pass through a server. The privacy policy says exactly what is sent and how long it is kept.

How the numbers are checked

The calculation logic is separated from the interface and has its own automated test suite — over 220 cases run on every change. A change that breaks a formula is caught before it reaches the site rather than after someone relies on it.

Where a tool follows a published standard, the standard is named on the page: Mifflin-St Jeor for TDEE, the WHO and Asian cut-offs for BMI, Naegele’s rule for due dates. You can check the method, not just the number.

The name and the domain

The site is called Toolist but its address is toolboxcore.com. The two names are different, so if you remember one and cannot find the other, that is why: Toolist is what it is called, toolboxcore.com is where it lives.

There is no other site of ours. Every tool described here sits under toolboxcore.com — a site calling itself Toolist at any other address is not this one.

Limits

These are estimates. For decisions that matter — financial, legal or medical — check the result against a qualified professional. A general-purpose form cannot know the specifics of your situation.