Purpose and scope
Effective October 18, 2026. These tools and guides provide general educational calculation support. You are responsible for verifying inputs, interpreting assumptions and checking results against appropriate equipment documentation and professional advice for your application.
Estimates and equipment decisions
Theoretical speeds, empirical drag-racing results and selected drivetrain-loss scenarios do not guarantee performance. A ratio or chain-length result does not establish component strength, fit, ratings or safe operation. Follow manufacturer instructions and applicable event requirements.
Do not use these worksheets as an aviation instrument, vehicle control system or substitute for engineering validation. No search ranking, indexing, traffic or advertising outcome is promised.
Use of the service
You may use the calculators without an account. Do not interfere with service availability or misrepresent a copied result as a measured or professionally certified value. Keep the formula context and assumptions with results you share.
Availability and corrections
Tools and content may be corrected or updated as issues are identified. Preserve your input values, units and method date when reproducibility matters. Report an issue with enough information to reproduce it.
Nothing here is intended to exclude rights that cannot lawfully be excluded. Operator identity, applicable terms and jurisdiction-specific legal review must be completed before public launch.