About Pulse Beam
Pulse Beam is a library of 300+ calculators. One editor writes them and checks each formula against the source that defines it.
Last reviewed 18 September 2026How a calculator gets published here
The same four steps run every time, whether the tool is about a payroll deduction or the amount of paint for a room.
Start from a calculation people actually repeat
A tool earns its place when the same arithmetic keeps showing up in real work: pricing a job, splitting a delivery cost, sizing a tank, comparing two loan offers. One-off curiosities do not get built.
Find the definition that governs the answer
Where a standards body, tax authority or regulator defines the formula, that definition wins and is named inside the tool. Where no single authority exists, we use the convention most widely used in practice and say so on the page rather than hiding the choice.
Build it around your numbers, not ours
Labelled fields, the unit printed next to the value, results that update as you type, and no signup between you and the answer.
Test the edges before it goes live
Every tool is run against worked examples and against the inputs that break naive arithmetic: zero, negatives, blank fields and values large enough to expose rounding. A tool that silently returns a wrong number is worse than no tool.
What we do not do
Pulse Beam is not your accountant, tax adviser, lawyer, engineer or physician. We do not review your personal circumstances, we do not tell you what to do, and nothing here is professional advice.
Every calculator on this site produces an estimate from the numbers you type in. It has no way of knowing whether those numbers are right, whether a rule applies to you, or which jurisdiction you are standing in. Where a decision carries tax, legal, medical, structural or financial consequences, take the estimate to a licensed professional and let them check it against your situation.
Where the numbers come from
Most calculators on this site are not original research. They are a careful implementation of a formula that already exists somewhere authoritative, plus an interface that does not make you hunt for the right unit.
Where an authority exists, the tool names it: a statutory contribution formula, a published conversion factor, an accounting identity, an engineering coefficient from a recognised reference. That citation is part of the tool, not an afterthought, because it is the only way you can check our work independently.
Where the field has no single authority, we pick the convention that dominates in practice, state the assumption next to the result, and avoid presenting a contested definition as settled fact.
Ray writes and maintains the calculator library on this site. The work is checking that the formula behind each tool matches the source that defines it, that the units cannot be misread, and that the output is labelled as an estimate rather than a verdict. He is not a licensed accountant, financial adviser, attorney or physician, and Pulse Beam does not offer professional advice. If a number here disagrees with your own source, say so and it will be checked.
Corrections, in the open
If a calculator returns something you believe is wrong, send the tool name, the values you entered and the result you expected. Errors are treated as the priority queue: the tool is checked against its source and corrected if it disagrees. Nothing is quietly removed to make the site look tidier.
Advertising does not influence which calculators get built, how a formula is defined, or what a guide recommends. If this site ever carries a sponsored placement, it will be labelled as one.