Universal Custom Ratio Mix Splitter
Calculate mix splits by weight or volume using custom mix ratios (like 100:43) and custom specific densities. Adjust the parameters in the interactive workbench below to get immediate recipe card outputs.
Universal Custom Ratio Mix Splitter
Advanced Mix Ratio Config
MEASUREMENT OUTPUTS
RESIN (PART A)
288.8g
Volume
262.5ml
HARDENER (PART B)
288.8g
Volume
262.5ml
TOTAL WEIGHT
577.5g
Material Cost
$17.32
MakerRatio • Studio Workshop Batch Sheet
https://makerratio.com • Precision Craft Formula Record
Date: _______________
Batch #: ____________
Project: Custom Ratio (Generic Epoxy)
Category: epoxy
Dimensions: 525.0 ml
Mix Ratio: 1:1 (weight)
Specific Gravity: 1.1 g/ml
Safety Spill Margin: 5%
Batch Mix Breakdown (By Exact Weight)
Workshop Safety & Quality Protocol:
[ ] Ambient room temp 70°F–78°F (21°C–25°C) & mold leveled.
[ ] Protective nitrile gloves on & workspace ventilation active.
[ ] Mix thoroughly scraping sides and bottom for 3 full minutes.
[ ] Verify pot life and demold window per manufacturer TDS.
Curing Schedule Log:
Pour Time: ___________
Gel / Tack-Free: ______
Demold Time: ________
Recommended Materials & Tools for this Project
Puduo 1:1 Crystal Clear Tabletop Epoxy
Formula: 1:1 mix ratio. High-gloss self-leveling surface coating for countertops, tumblers, and shallow mold castings.
Precision Digital Gram Scale (0.01g Accuracy)
Specification: Tare-capable digital scale with 0.01g to 500g range for exact Part A and Part B chemical weight measurement.
Transparency Notice: As an Amazon Associate, MakerRatio earns from qualifying purchases at zero extra cost to you. Product recommendations are selected based on verified Manufacturer Technical Data Sheets (TDS). Always consult chemical safety data before pouring.
Embed This Calculator on Your Blog or Shop Website
Allow your readers or craft customers to calculate exact material ratios directly on your website. Free, responsive, and easy to copy.
<iframe src="https://makerratio.com/resin/custom-ratio-calculator/" width="100%" height="650" frameborder="0" style="border-radius:16px; border:1px solid #1e293b;" title="Universal Custom Ratio Mix Splitter"></iframe><p style="font-size:12px; text-align:center; margin-top:8px;">Powered by <a href="https://makerratio.com/resin/custom-ratio-calculator/" target="_blank" rel="noopener">MakerRatio Craft Calculators</a></p>Calculation Logic & Engineering Formula
To calculate the exact volume and weight splits for this craft project, the workbench executes the following geometric equations:
Universal 2-Part Polymer Mixing Ratio Roster
Stoichiometric FormulationsMathematical formulation splits, percentage allocations, and industrial brand mappings across universal 2-part polymer systems.
| Chemical Ratio Notation | Ratio Math Formulation | Target Batch Weight (g) | Part A (Resin / Base) | Part B (Hardener / Catalyst) | Common Industrial Brands |
|---|---|---|---|---|---|
| 1:1 Equal Ratio | Total / 2 | 200.0 g | 100.0 g (50.0%) | 100.0 g (50.0%) | ArtResin, Let's Resin, Tabletop Epoxies |
| 2:1 Standard Ratio | Part A = Tot × (2/3) | 300.0 g | 200.0 g (66.7%) | 100.0 g (33.3%) | Superclear 2.0, EcoPoxy, Liquid Glass |
| 3:1 Deep Pour Ratio | Part A = Tot × (3/4) | 400.0 g | 300.0 g (75.0%) | 100.0 g (25.0%) | TotalBoat ThickSet, MAS Deep Pour |
| 4:1 High Build Ratio | Part A = Tot × (4/5) | 500.0 g | 400.0 g (80.0%) | 200.0 g (20.0%) | Jesmonite AC730, Marine Gelcoats |
| 5:1 Marine Epoxy | Part A = Tot × (5/6) | 600.0 g | 500.0 g (83.3%) | 100.0 g (16.7%) | West System 105/205 Marine Epoxy |
| 10:1 Condensation Silicone | Part A = Tot × (10/11) | 550.0 g | 500.0 g (90.9%) | 50.0 g (9.1%) | Tin-Cure Mold Rubbers, RTV Silicones |
| 100:45 European Ratio | Part A = Tot / 1.45 | 290.0 g | 200.0 g (69.0%) | 90.0 g (31.0%) | Specialized European Craft Epoxies |
In-Depth Crafting Guide & Density Analysis
Advanced polymer casting, marine composite repair, and industrial mold making rely on specialized non-1:1 mixing ratios (such as 2:1, 3:1, 5:1, 10:1, or 100:45) that cannot be calculated with basic equal-part math. Because hardeners and base resins possess distinct chemical stoichiometries, estimating ratios by eye causes tacky surfaces, uncured soft spots, and permanent structural failure.
This universal custom ratio solver computes exact Part A and Part B component splits by weight or volume, supports custom specific gravity densities, and gives digital scale target readouts in grams or ounces.
Frequently Asked Questions (Custom Ratio Craft Calculator)
What mathematical formula splits any custom 2-part ratio (A:B)?
For a target total weight (W_total) and ratio A:B, calculate: Part A = W_total × (A / (A + B)) and Part B = W_total × (B / (A + B)). For example, in a 5:1 ratio for 600g: Part A is 600 × (5/6) = 500g, and Part B is 600 × (1/6) = 100g.
Why do mixing ratios by volume differ from mixing ratios by weight?
Volume ratios assume 1 liter to 1 liter. However, hardeners (Part B) are frequently less dense than resin bases (Part A). If a product specifies 100A:45B by weight, measuring 100ml:45ml in cups will cause an incorrect chemical cure. Always verify whether the packaging states by weight or by volume.
What happens if you add extra hardener to make resin cure faster?
Epoxy is not polyester fiberglass resin. Adding extra hardener disrupts stoichiometric balance; unbonded chemical molecules cannot cross-link, causing the cured resin to remain permanently rubbery, sticky, or oily.
How do you calculate a 100:30 by weight ratio for 260 grams of material?
Divide total target weight by 1.30 to find Part A: 260 / 1.30 = 200.0g of Part A. Multiply 200.0 × 0.30 = 60.0g of Part B.
How does temperature affect mixing accuracy for non-1:1 ratios?
Cold temperatures (below 65°F / 18°C) thicken Part A resin significantly, causing makers to under-pour Part A. Always warm resin bottles in a 75°F–80°F water bath before weighing on a scale.
Other Calculators in the RESIN Suite
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