Project notes
Understand this estimate
Dilution instructions can state a percentage of base volume or a parts ratio for a final batch. The denominator must be clear before calculating.
How to use the calculator
Select the label’s ratio basis
Choose base-relative percentage or parts in a specified final batch.
Inputs Mixing basis
Enter only inputs used by that basis
Percentage mode uses base volume and percent. Ratio mode uses final batch volume and base-to-reducer parts.
Inputs Base coating volume · Reducer percentage · Desired final mixture · Base coating parts · Reducer parts
Formula and variables
Percentage basis: reducer = base volume × percentage ÷ 100; final volume = base + reducer. Final-batch ratio: each component = final volume × its parts ÷ total parts.
- B × p ÷ 100Percentage-mode reducer
- Percentage of base coating volume.US fl oz
- T × a ÷ (a + b)Ratio-mode base
- Base share of the desired final volume.US fl oz
- T × b ÷ (a + b)Ratio-mode reducer
- Reducer share of the desired final volume.US fl oz
What the result means
Result interpretation
The outputs show base, added reducer and final mixture. The calculator does not choose a reducer or recommend a ratio; use only a current compatible product instruction with an explicit basis.
Limits and assumptions
The calculator does not recommend a thinner, reducer or dilution ratio. A label saying only “1:10” is ambiguous unless it defines the components and denominator. Follow product-specific limits and compatibility instructions.
Worked examples
Add 10% of base volume
Assumptions
- The label explicitly defines 10% relative to base coating volume.
- Base volume is 128 US fl oz.
Calculation
- 128 × 0.10 = 12.8 fl oz reducer.
- 128 + 12.8 = 140.8 fl oz final mixture.
| Base coating | 128 US fl oz |
|---|---|
| Added reducer | 12.8 US fl oz |
| Final mixture | 140.8 US fl oz |
Make a 256-fluid-ounce 1:9 final ratio
Assumptions
- The label defines a final-batch base-to-reducer ratio of 1:9.
- The desired final mixture is 256 US fl oz.
Calculation
- 256 × 1 ÷ 10 = 25.6 fl oz base.
- 256 × 9 ÷ 10 = 230.4 fl oz reducer.
| Base coating | 25.6 US fl oz |
|---|---|
| Added reducer | 230.4 US fl oz |
| Final mixture | 256 US fl oz |
Common questions
- Does “1:10” always mean one part coating and ten parts reducer?
- No. Verify component order and denominator in the product instructions before entering a ratio.
- Does this calculator recommend a reducer?
- No. Compatibility and allowed dilution are product-specific.