Examples
Examples
Try the starting example
- Fixed ideally mixed system volume (L)
- 10
- Initial concentration on supplied comparable percentage basis
- 40
- Drain/refill stages: ID, drained L, replacement concentration %
- S1,2,0 S2,2,100
- Modeled concentration after each complete drain/refill (%)
- S1: 32; S2: 45.6
- Final modeled concentration (%)
- 45.6
- Total replacement volume added (L)
- 4
- Final modeled solute-equivalent volume (L)
- 4.56
Try another scenario
- Fixed ideally mixed system volume (L)
- 10
- Initial concentration on supplied comparable percentage basis
- 40
- Drain/refill stages: ID, drained L, replacement concentration %
- S1,2,0 S2,2,50
- Modeled concentration after each complete drain/refill (%)
- S1: 32; S2: 35.6
- Final modeled concentration (%)
- 35.6
- Total replacement volume added (L)
- 4
- Final modeled solute-equivalent volume (L)
- 3.56
Calculation method
Calculation method
Modeled concentration after each complete drain/refill (%)
New concentration=old×(1−drained/system)+replacement×drained/system, fully mixing before next stage.
Final modeled concentration (%)
Last stage concentration without clipping or choosing a target.
Total replacement volume added (L)
Sum supplied drained/replaced volumes.
Final modeled solute-equivalent volume (L)
Fixed system volume×final concentration/100, under additive comparable-volume assumptions.
Symbols and units
- a
- Fixed ideally mixed system volume (L)
- b
- Initial concentration on supplied comparable percentage basis
- c
- Drain/refill stages: ID, drained L, replacement concentration %
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- An ideal nonreacting constant-volume drain/refill concentration model. It does not identify coolant chemistry, compatibility, freeze protection, actual mixing behavior or an acceptable vehicle specification.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
OpenStax: ratios, unit rates and supplied measurement arithmetic ↗
Background reading; this does not imply endorsement or independent review of SumFizz.