Calculation method
See formulas, exact units, worked examples and the limits of Mixkind’s quantity calculations.
Mold geometry
All dimensions are converted to centimetres first. One cm³ is one mL. Rectangle volume is length × width × depth. Circular cylinder volume is π × (diameter/2)² × depth. Only internal, straight-sided empty cavities are supported. The count is an integer. The optional allowance is applied once after multiplying by count.
Density and material state
Mass = volume × density, using g, mL and g/mL. Enter the density provided for the exact material and state; the tool has no generic resin density. For example, 500 mL × 1.1 g/mL = 550 g. This is an arithmetic illustration, not a suggested density. It does not model cure shrinkage or process chemistry.
A:B ratios are basis-specific
A mass ratio and a volume ratio are different information. This tool never converts between them. For a:b and total T in the selected basis, A = T a/(a+b), B = T × b ÷ (a + b). For a known A, B = A b/a. A 2:1 mass ratio gives 200 g + 100 g from 300 g; the same numbers in a volume ratio describe mL, not grams. Follow the supplied product instructions.
Batch cost
Each component cost equals grams/1,000 × price/kg. Other entered cost is added once per batch. Multiply by an integer count for the full run. At 200 g A priced 20/kg and 100 g B priced 30/kg, the material cost is 7; with 1 extra, five batches cost 40. Currency is a label only.
Exact unit definitions
1 in = 2.54 cm; 1 mm = 0.1 cm; 1 L = 1,000 mL; 1 US fluid ounce = 29.5735295625 mL; 1 kg = 1,000 g; 1 avoirdupois ounce = 28.349523125 g. The volume ounce is explicitly US fluid oz and is not the mass ounce. Unit changes convert the existing valid amount. Changing ratio basis starts a fresh basis and clears ratio and amount fields.
Input limits and rounding
Dimensions: >0 to 1,000,000 in the selected length unit. Count: integer 1–100,000. Extra allowance: 0–200%. Density: >0 to 100 g/mL. Each ratio part: >0 to 1,000,000. Other amounts and prices: 0 to 10¹², with positive conversion and mixing amounts. Outputs must remain finite and at most 10¹⁵ in base units. Display uses up to four decimals (or significant digits for very small values); CSV preserves underlying numeric precision.
Practical boundary
These are quantity and cost calculations. They do not recommend a formulation, ratio, cure time, maximum pour depth, temperature or chemical handling steps. Irregular molds, embedded objects, shrinkage, material compatibility and actual process losses are outside the model. Use product documentation and verify measurements before working.