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Free calculators and converters that make your games & screens smarter.

Free Online Tools brings together 154 fast, focused calculators, converters, and utility tools. From fuel costs, paint estimates, and Ohm's law, to gaming helpers, URL encoding, public IP checks and much more.

Fast & lightweight

No bloated dashboards. Open a tool and get straight to work.

Privacy-minded

Simple tools with minimal friction, clear purpose, and no account required.

Easy to use

Consistent layouts across every tool, so you can find what you need quickly.

Built in Brisbane by Ethan & Tony

Free Online Tools is a father-and-son project from Queensland, Australia. We build calculators we actually use, fuel and towing maths, electrical helpers, converters, and everyday utilities, then add clear how-to notes so the page is useful even before you hit calculate.

Every public tool is maintained by us. Thin stubs, unfinished experiments, and policy-risky pages are kept offline. Prefer to know who runs the site? Read About, our Articles, or get in touch.

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154 free tools from Free Online Tools, listed in A, Z order within each category.

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Tool of the day

Steel & Aluminium Price Aggregator

Metal traders, fabrication estimators and procurement staff upload supplier CSV price lists to compare steel and aluminium products across vendors with categories, materials and profiles aligned automatically. In browser calculations highlight outliers before you place mill orders. Optional export supports internal quoting workflows. Use it when you reconcile monthly supplier sheets, train junior buyers on fair pricing, or sanity check a single urgent quote without opening a full ERP module.

Normalise messy supplier columns, flag missing grades, and export a comparison table your estimator can paste into a quote template before calling the mill. Charts can highlight cheapest supplier per profile when you upload multiple months, which supports tender reviews in fabrication shops.

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