How to use (3 steps)
- Pick metric or US units and choose whether the product ratio is by weight or volume.
- Enter the mix ratio and either the total amount, a known A/B amount, or densities to convert weight to volume.
- Review the auto-calculated amounts, copy the shareable URL, and mix thoroughly.
A 4:1 sample is preloaded so results appear right away.
Mix settings
Units are for display only—keep one system per calculation.
Use the ratio type printed in the technical datasheet. If only weight is given, keep "By weight".
Inputs stay in your browser and are stored in the shareable URL.
Calculation mode
Inputs
Inputs
Inputs
Results
Auto-updated when you change any field.
Keep the same units within one batch; mix in a clean cup and scrape the sides.
Related calculators
How to use this calculator effectively
This guide helps you use Epoxy mix ratio calculator (weight & volume) in a repeatable way: set a baseline, change one variable at a time, and interpret the output with clear assumptions before sharing or exporting results.
How it works
The calculator takes your input values, applies a deterministic formula set, and returns output using display rounding only at the final step. This means the tool is best used as a comparison engine: keep one scenario as a reference, then test alternate assumptions so you can quantify how sensitive the final answer is to each input.
When to use
Use this page when you need a fast planning estimate, a classroom sanity check, or a shareable scenario that another person can reproduce from the same parameters. It is especially useful before deeper modeling, because it exposes direction and magnitude quickly without requiring sign-in or setup friction.
Common mistakes to avoid
- Mixing units (for example, percent vs decimal, or monthly vs yearly assumptions).
- Changing multiple fields at once, which makes it hard to explain why results shifted.
- Comparing outputs from different tools without aligning defaults and conventions.
- Reading rounded display numbers as exact values in downstream calculations.
Interpretation and worked example
Run a baseline case first and keep a copy of that output. Next, change one assumption to represent your realistic alternative, then compare the delta in both absolute and percentage terms. If the direction matches your domain intuition and the size of change is plausible, your setup is likely coherent. If not, review units, sign conventions, and hidden defaults before drawing conclusions.
See also
FAQ
Should I mix by weight or by volume?
Follow the datasheet. If only a weight ratio is provided, measure by weight. Use the converter only when you must measure by volume.
How much deviation is acceptable?
Stay within the tolerance from the manufacturer—commonly within about ±2–3%. If you overshoot, remix a fresh batch instead of trying to fix a small cup.
What should I enter first?
Start with the minimum required inputs shown above the calculate button, then keep optional settings at their defaults for a first run. After you get a baseline result, change one parameter at a time so you can see exactly what caused the output to move.
How precise are the results?
The calculator keeps internal precision and rounds only for display. Small differences can still appear when another tool uses different constants, unit assumptions, or rounding rules. Match the same assumptions before comparing values.
Why can my result differ from another calculator?
Different tools often choose different conventions, default rates, or date-count methods. Check units, period settings, and any hidden defaults first. If your setup matches and values still differ, use the worked example and steps section to identify the branch where methods diverge.
What is pot life and how should I plan around it?
Pot life is the amount of usable time after Part A and Part B are mixed. Exceeding it can increase viscosity, create heat, and reduce wetting quality. To avoid surprises, mix smaller batches, keep working temperature stable, and only mix what you can coat within one pot life.
Can I mix Part A and Part B from different brands?
Not unless the datasheet explicitly lists the pair as compatible. Even when the chemistry seems similar, catalyst and solvent systems can vary, causing cure delay, poor adhesion, or brittle films.
How much extra material should I prepare?
For smooth wall and deck coating, a 5–15% reserve is common; for uneven or filled substrates, 15–30% helps prevent running out on-site. Start with a pilot batch, then add a small overage to the final estimate.