Eucalyptus One Software

Tools that
show their work.

Engineering calculations, PCB analysis, and step-by-step mathematics. Check results against equations, worked steps, and examples.

No account needed. Calculations stay in your browser.

Clear equations & worked examplesInputs stay on your deviceModel assumptions included

Free calculators

Choose a subject

Start here

Three calculations to try

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Our software

What we’re building

Engineering and PCB software, free mathematics tools, and CreditCadence for iPhone and iPad.

Electrical engineering · Pre-release

Engineering Workbench

A collection of electrical engineering tools spanning design, commissioning, verification, and reports.

Explore the workbench ↗

PCB analysis · Pre-release

TraceFlow

Explore board geometry, multilayer connections, and electrical power distribution.

Discover TraceFlow ↗

Mathematics · All tools free

Math Workbench

Free matrix, differential-equation, and numerical-method calculators with typeset steps and local downloads.

Explore Math Workbench ↗

iPhone & iPad · Pre-release

CreditCadence

Keep track of your cards, compare purchase rewards, and manage benefit deadlines.

About CreditCadence ↗

Using the calculators

Check the method
behind the result.

Every free tool pairs its answer with equations, a worked example, and the assumptions behind the model. Start with the example, then enter your own values and check the calculation steps.

About Eucalyptus One ↗

Understand the method

Follow intermediate steps and see where approximations enter the calculation.

Keep your work local

Calculator inputs are processed in your browser. No account, upload, or saved project is required.

Know the limits

Read the assumptions for each tool, including the effects and operating conditions its model leaves out.