Additive Manufacturing calculator
Powder Refresh Rate Calculator
Powder bed processes often blend used powder with virgin powder to control part quality and material cost. This calculator shows the new-powder percentage in the blend so technicians can verify the build meets process limits.
What this calculator does
- Calculate new-powder refresh percentage in a powder bed blend and compare it with a target refresh rate.
- a powder bed technician or materials engineer needs to check virgin powder refresh before a build
- Returns the percent of virgin powder in the powder blend.
Formula used
- Powder refresh rate = virgin powder added รท total powder blend
- Gap to target = required refresh rate - actual refresh rate
Inputs explained
- Virgin powder added: undefined
- Total powder blend: undefined
- Required refresh rate: undefined
How to use the result
- Use it when preparing SLS, MJF, or metal powder builds with controlled refresh ratios.
- It does not account for particle size distribution, contamination, moisture, oxygen, or material-specific reuse limits.
Common questions
- What does a negative gap mean? The blend is above the required refresh target by that many percentage points.
- Should sieved powder be in total blend? Yes if it is actually loaded into the build as part of the reusable blend.
- Can this approve powder reuse? No. It checks the blend percentage; lab and machine-specific powder acceptance rules still apply.
- How does this help cost? It balances material cost savings from reuse against process requirements for part quality.
Last reviewed 2026-05-12.