Simple pricing. No surprises.
Core engineering tools remain free forever. Upgrade to Premium for advanced professional capabilities.
Free
Everything you need, no strings attached.
- Horizontal tank volume calculator
- Vertical tank volume calculator
- Engineering unit converter (200+ units)
- Full calculation breakdown & formula display
- SI and imperial unit support
- PASS / FAIL code compliance output
- No account required
- Works on any device, any OS
Premium
Coming soonAdvanced features for professional engineers.
- Beam bending & stress calculators
- Heat exchanger sizing
- Pump head & NPSH calculations
- Save and export results as PDF
- Custom material property library
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Got questions?
Frequently asked
Are the core calculators free?
Yes — completely. All fundamental calculators are free to use with no hidden charges. We believe basic engineering tools should be accessible to everyone.
Do I need to create an account?
No. You can use every free calculator without signing up. A Premium account will be required for advanced features like saving results and generating reports.
How accurate are the calculations?
Calculation formulas are documented and implemented with consistent units and numerical checks. Results are displayed to practical engineering precision.
What is included in Premium?
Premium unlocks professional tools like PDF exports, custom material libraries, pump head calculations, and advanced stress calculators. The core free tools will remain free forever.