Permanent way & track design
Rail Engineering calculators
Calculators for track geometry, rail stress and permanent way design — built for track engineers, designers and maintainers.
- Cant Deficiency CalculatorEquilibrium cant, deficiency and excess for a curve — from speed, radius and applied cant.
- Rail Thermal Expansion CalculatorFree expansion of jointed rail, and the axial force locked into CWR, from temperature change.
- Curve Speed CalculatorMaximum permissible speed through a curve — from radius, applied cant and your deficiency limit.
- Transition Curve Length CalculatorRequired transition length from cant gradient, rate of change of cant, and rate of change of deficiency.
- Versine to Radius ConverterCurve radius from a measured versine — and the equivalent versine on any other chord length.
- Grade Resistance & Trailing Load CalculatorTotal resistance to motion on a ruling grade — and the trailing load your tractive effort will actually move.