Foundry & Forging calculator

Riser Yield Impact Calculator

Calculate how much riser weight affects casting yield for a mold or casting family. Use it when evaluating riser sizing, feeding practice, simulation changes, exothermic sleeves, chills, or pattern changes.

What this calculator does

  • Calculate how much riser weight affects casting yield for a mold or casting family.
  • Use it when evaluating riser sizing, feeding practice, simulation changes, exothermic sleeves, chills, or pattern changes.
  • Measures feeder/riser impact on yield.

Formula used

  • Riser Yield Impact rate = riser and feeder weight ÷ total pour weight × 100
  • Riser Yield Impact gap to target = calculated rate - target riser weight share

Inputs explained

  • Riser and feeder weight: Enter total riser, feeder, sleeve, and neck weight removed from the casting system.
  • Total pour weight: Use casting, gate, sprue, runner, riser, and overflow weight for the same mold or lot.
  • Target riser weight share: Use the engineering target or historical riser share for this casting family.

How to use the result

  • Use during casting layout and yield review.
  • This calculator is an estimating tool. Results can change with alloy chemistry, furnace practice, ladle losses, mold design, gating and riser layout, core condition, pattern allowance, die temperature, press condition, inspection criteria, rework rules, energy rates, labor standards, and actual shop performance. Validate safety-critical, metallurgical, tooling, press-capacity, and customer-spec decisions with qualified engineering, metallurgy, OEM data, and the applicable control plan.

Common questions

  • What information do I need before using the Riser Yield Impact? Use riser weight, total pour weight, and target riser share for the same mold design.
  • What does the result mean? It shows riser weight as a percentage of total pour weight and gap to target.
  • When is the result only an estimate? This calculator is an estimating tool. Results can change with alloy chemistry, furnace practice, ladle losses, mold design, gating and riser layout, core condition, pattern allowance, die temperature, press condition, inspection criteria, rework rules, energy rates, labor standards, and actual shop performance. Validate safety-critical, metallurgical, tooling, press-capacity, and customer-spec decisions with qualified engineering, metallurgy, OEM data, and the applicable control plan.
  • What decision can I make from the result? Use it to decide whether riser optimization, sleeve changes, or simulation work is worth pursuing.

Last reviewed 2026-05-12.