About ZemTools

What you can use ZemTools for

The site is organised around the task you need to complete:

• Math & Science: time calculations, significant figures, rounding, and business-hours calculations.
• Digital & Developer: text cleaning, word counting, line handling, case conversion, find-and-replace, and small developer utilities.
• Home & Construction: planning estimates for gravel, fencing, decking, paint, paver edges, and related projects.
• Energy & Electrical: practical planning tools such as wire-size, voltage-drop, and conduit-fill calculations.

You can browse the full directory on the All Tools page, or open a category to find tools for a particular kind of task.

Designed around practical tasks

Each tool is intended to make one job easier to understand and complete. Depending on the tool, that may mean entering measurements, choosing units, cleaning text, comparing quantities, or reviewing a calculated result. We aim to keep the controls straightforward and to explain important inputs, units, assumptions, and limitations where they matter.

Tools are provided for general use. A result should make sense alongside the inputs you supplied; check the units and assumptions before using it in a real project.

Accuracy, updates, and corrections

Calculators can depend on formulas, conversion factors, material assumptions, and the way a project is measured. A result may be an estimate rather than a final quantity or specification. We work to improve the tools and correct issues when they are identified, but we cannot promise that every result will be suitable for every situation.

For construction, electrical, financial, medical, legal, or other safety-critical decisions, independently verify the result and consult an appropriately qualified professional where needed. ZemTools should not be the only basis for a consequential decision.

Privacy and your information

The current calculator and utility tools are designed to process their core inputs in your browser rather than sending those values to a ZemTools application server. The site also uses Google Analytics to understand general website usage. Read the Privacy Policy for details about analytics, hosting-related technical data, external services, and the site's current advertising status. Please do not enter passwords or other sensitive personal information into any tool or public feedback channel.

Feedback and improvements

Found an issue, unclear result, or a tool that would be useful? Visit the Contact page to send a report or suggestion through the project's public issue tracker. Include the page or tool name and a description of the problem, but leave out private or sensitive information.